diff --git a/go/vt/sqlparser/analyzer.go b/go/vt/sqlparser/analyzer.go
index 3469edcd0c2..466a2346584 100644
--- a/go/vt/sqlparser/analyzer.go
+++ b/go/vt/sqlparser/analyzer.go
@@ -20,7 +20,6 @@ package sqlparser
 
 import (
 	"fmt"
-	"strconv"
 	"strings"
 	"unicode"
 
@@ -96,6 +95,15 @@ func CanNormalize(stmt Statement) bool {
 	return false
 }
 
+//IsSetStatement takes Statement and returns if the statement is set statement.
+func IsSetStatement(stmt Statement) bool {
+	switch stmt.(type) {
+	case *Set:
+		return true
+	}
+	return false
+}
+
 // Preview analyzes the beginning of the query using a simpler and faster
 // textual comparison to identify the statement type.
 func Preview(sql string) StatementType {
@@ -365,101 +373,3 @@ func NewPlanValue(node Expr) (sqltypes.PlanValue, error) {
 	}
 	return sqltypes.PlanValue{}, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "expression is too complex '%v'", String(node))
 }
-
-// SetKey is the extracted key from one SetExpr
-type SetKey struct {
-	Key   string
-	Scope string
-}
-
-// ExtractSetValues returns a map of key-value pairs
-// if the query is a SET statement. Values can be bool, int64 or string.
-// Since set variable names are case insensitive, all keys are returned
-// as lower case.
-func ExtractSetValues(sql string) (keyValues map[SetKey]interface{}, scope string, err error) {
-	stmt, err := Parse(sql)
-	if err != nil {
-		return nil, "", err
-	}
-	setStmt, ok := stmt.(*Set)
-	if !ok {
-		return nil, "", fmt.Errorf("ast did not yield *sqlparser.Set: %T", stmt)
-	}
-	result := make(map[SetKey]interface{})
-	for _, expr := range setStmt.Exprs {
-		var scope string
-		key := expr.Name.Lowered()
-
-		switch expr.Name.at {
-		case NoAt:
-			scope = ImplicitStr
-		case SingleAt:
-			scope = VariableStr
-		case DoubleAt:
-			switch {
-			case strings.HasPrefix(key, "global."):
-				scope = GlobalStr
-				key = strings.TrimPrefix(key, "global.")
-			case strings.HasPrefix(key, "session."):
-				scope = SessionStr
-				key = strings.TrimPrefix(key, "session.")
-			case strings.HasPrefix(key, "vitess_metadata."):
-				scope = VitessMetadataStr
-				key = strings.TrimPrefix(key, "vitess_metadata.")
-			default:
-				scope = SessionStr
-			}
-
-			// This is what correctly allows us to handle queries such as "set @@session.`autocommit`=1"
-			// it will remove backticks and double quotes that might surround the part after the first period
-			_, out := NewStringTokenizer(key).Scan()
-			key = string(out)
-		}
-
-		if setStmt.Scope != "" && scope != "" {
-			return nil, "", fmt.Errorf("unsupported in set: mixed using of variable scope")
-		}
-
-		setKey := SetKey{
-			Key:   key,
-			Scope: scope,
-		}
-
-		switch expr := expr.Expr.(type) {
-		case *SQLVal:
-			switch expr.Type {
-			case StrVal:
-				result[setKey] = strings.ToLower(string(expr.Val))
-			case IntVal:
-				num, err := strconv.ParseInt(string(expr.Val), 0, 64)
-				if err != nil {
-					return nil, "", err
-				}
-				result[setKey] = num
-			case FloatVal:
-				num, err := strconv.ParseFloat(string(expr.Val), 64)
-				if err != nil {
-					return nil, "", err
-				}
-				result[setKey] = num
-			default:
-				return nil, "", fmt.Errorf("invalid value type: %v", String(expr))
-			}
-		case BoolVal:
-			var val int64
-			if expr {
-				val = 1
-			}
-			result[setKey] = val
-		case *ColName:
-			result[setKey] = expr.Name.String()
-		case *NullVal:
-			result[setKey] = nil
-		case *Default:
-			result[setKey] = "default"
-		default:
-			return nil, "", fmt.Errorf("invalid syntax: %s", String(expr))
-		}
-	}
-	return result, strings.ToLower(setStmt.Scope), nil
-}
diff --git a/go/vt/sqlparser/analyzer_test.go b/go/vt/sqlparser/analyzer_test.go
index a0d6e731965..5ec11870b21 100644
--- a/go/vt/sqlparser/analyzer_test.go
+++ b/go/vt/sqlparser/analyzer_test.go
@@ -21,9 +21,6 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/google/go-cmp/cmp"
-	"github.com/stretchr/testify/require"
-
 	"github.com/stretchr/testify/assert"
 	"vitess.io/vitess/go/sqltypes"
 )
@@ -435,188 +432,6 @@ func TestNewPlanValue(t *testing.T) {
 	}
 }
 
-func TestExtractSetValues(t *testing.T) {
-	testcases := []struct {
-		sql   string
-		out   map[SetKey]interface{}
-		scope string
-		err   string
-	}{{
-		sql: "invalid",
-		err: "syntax error at position 8 near 'invalid'",
-	}, {
-		sql: "select * from t",
-		err: "ast did not yield *sqlparser.Set: *sqlparser.Select",
-	}, {
-		sql: "set autocommit=1+1",
-		err: "invalid syntax: 1 + 1",
-	}, {
-		sql: "set transaction_mode='single'",
-		out: map[SetKey]interface{}{{Key: "transaction_mode", Scope: ImplicitStr}: "single"},
-	}, {
-		sql: "set autocommit=1",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: ImplicitStr}: int64(1)},
-	}, {
-		sql: "set autocommit=true",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: ImplicitStr}: int64(1)},
-	}, {
-		sql: "set autocommit=false",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: ImplicitStr}: int64(0)},
-	}, {
-		sql: "set autocommit=on",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: ImplicitStr}: "on"},
-	}, {
-		sql: "set autocommit=off",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: ImplicitStr}: "off"},
-	}, {
-		sql: "set @@global.autocommit=1",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: GlobalStr}: int64(1)},
-	}, {
-		sql: "set @@global.autocommit=1",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: GlobalStr}: int64(1)},
-	}, {
-		sql: "set @@session.autocommit=1",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: SessionStr}: int64(1)},
-	}, {
-		sql: "set @@session.`autocommit`=1",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: SessionStr}: int64(1)},
-	}, {
-		sql: "set @@session.'autocommit'=1",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: SessionStr}: int64(1)},
-	}, {
-		sql: "set @@session.\"autocommit\"=1",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: SessionStr}: int64(1)},
-	}, {
-		sql: "set @@session.'\"autocommit'=1",
-		out: map[SetKey]interface{}{{Key: "\"autocommit", Scope: SessionStr}: int64(1)},
-	}, {
-		sql: "set @@session.`autocommit'`=1",
-		out: map[SetKey]interface{}{{Key: "autocommit'", Scope: SessionStr}: int64(1)},
-	}, {
-		sql: "set AUTOCOMMIT=1",
-		out: map[SetKey]interface{}{{Key: "autocommit", Scope: ImplicitStr}: int64(1)},
-	}, {
-		sql: "SET character_set_results = NULL",
-		out: map[SetKey]interface{}{{Key: "character_set_results", Scope: ImplicitStr}: nil},
-	}, {
-		sql: "SET foo = 0x1234",
-		err: "invalid value type: 0x1234",
-	}, {
-		sql: "SET names utf8",
-		out: map[SetKey]interface{}{{Key: "names", Scope: ImplicitStr}: "utf8"},
-	}, {
-		sql: "SET names ascii collate ascii_bin",
-		out: map[SetKey]interface{}{{Key: "names", Scope: ImplicitStr}: "ascii"},
-	}, {
-		sql: "SET charset default",
-		out: map[SetKey]interface{}{{Key: "charset", Scope: ImplicitStr}: "default"},
-	}, {
-		sql: "SET character set ascii",
-		out: map[SetKey]interface{}{{Key: "charset", Scope: ImplicitStr}: "ascii"},
-	}, {
-		sql:   "SET SESSION wait_timeout = 3600",
-		out:   map[SetKey]interface{}{{Key: "wait_timeout", Scope: ImplicitStr}: int64(3600)},
-		scope: SessionStr,
-	}, {
-		sql:   "SET GLOBAL wait_timeout = 3600",
-		out:   map[SetKey]interface{}{{Key: "wait_timeout", Scope: ImplicitStr}: int64(3600)},
-		scope: GlobalStr,
-	}, {
-		sql:   "set session transaction isolation level repeatable read",
-		out:   map[SetKey]interface{}{{Key: TransactionStr, Scope: ImplicitStr}: IsolationLevelRepeatableRead},
-		scope: SessionStr,
-	}, {
-		sql:   "set session transaction isolation level read committed",
-		out:   map[SetKey]interface{}{{Key: TransactionStr, Scope: ImplicitStr}: IsolationLevelReadCommitted},
-		scope: SessionStr,
-	}, {
-		sql:   "set session transaction isolation level read uncommitted",
-		out:   map[SetKey]interface{}{{Key: TransactionStr, Scope: ImplicitStr}: IsolationLevelReadUncommitted},
-		scope: SessionStr,
-	}, {
-		sql:   "set session transaction isolation level serializable",
-		out:   map[SetKey]interface{}{{Key: TransactionStr, Scope: ImplicitStr}: IsolationLevelSerializable},
-		scope: SessionStr,
-	}, {
-		sql: "set transaction isolation level serializable",
-		out: map[SetKey]interface{}{{Key: TransactionStr, Scope: ImplicitStr}: IsolationLevelSerializable},
-	}, {
-		sql: "set transaction read only",
-		out: map[SetKey]interface{}{{Key: TransactionStr, Scope: ImplicitStr}: TxReadOnly},
-	}, {
-		sql: "set transaction read write",
-		out: map[SetKey]interface{}{{Key: TransactionStr, Scope: ImplicitStr}: TxReadWrite},
-	}, {
-		sql:   "set session transaction read write",
-		out:   map[SetKey]interface{}{{Key: TransactionStr, Scope: ImplicitStr}: TxReadWrite},
-		scope: SessionStr,
-	}, {
-		sql:   "set session tx_read_only = 0",
-		out:   map[SetKey]interface{}{{Key: "tx_read_only", Scope: ImplicitStr}: int64(0)},
-		scope: SessionStr,
-	}, {
-		sql:   "set session tx_read_only = 1",
-		out:   map[SetKey]interface{}{{Key: "tx_read_only", Scope: ImplicitStr}: int64(1)},
-		scope: SessionStr,
-	}, {
-		sql:   "set session sql_safe_updates = 0",
-		out:   map[SetKey]interface{}{{Key: "sql_safe_updates", Scope: ImplicitStr}: int64(0)},
-		scope: SessionStr,
-	}, {
-		sql:   "set session transaction_read_only = 0",
-		out:   map[SetKey]interface{}{{Key: "transaction_read_only", Scope: ImplicitStr}: int64(0)},
-		scope: SessionStr,
-	}, {
-		sql:   "set session transaction_read_only = 1",
-		out:   map[SetKey]interface{}{{Key: "transaction_read_only", Scope: ImplicitStr}: int64(1)},
-		scope: SessionStr,
-	}, {
-		sql:   "set session sql_safe_updates = 1",
-		out:   map[SetKey]interface{}{{Key: "sql_safe_updates", Scope: ImplicitStr}: int64(1)},
-		scope: SessionStr,
-	}, {
-		sql: "set @foo = 42",
-		out: map[SetKey]interface{}{
-			{Key: "foo", Scope: VariableStr}: int64(42),
-		},
-		scope: ImplicitStr,
-	}, {
-		sql: "set @foo.bar.baz = 42",
-		out: map[SetKey]interface{}{
-			{Key: "foo.bar.baz", Scope: VariableStr}: int64(42),
-		},
-		scope: ImplicitStr,
-	}, {
-		sql: "set @`string` = 'abc', @`float` = 4.2, @`int` = 42",
-		out: map[SetKey]interface{}{
-			{Key: "string", Scope: VariableStr}: "abc",
-			{Key: "float", Scope: VariableStr}:  4.2,
-			{Key: "int", Scope: VariableStr}:    int64(42),
-		},
-		scope: ImplicitStr,
-	}, {
-		sql: "set session @foo = 42",
-		err: "unsupported in set: scope and user defined variables",
-	}, {
-		sql: "set global @foo = 42",
-		err: "unsupported in set: scope and user defined variables",
-	}}
-	for _, tcase := range testcases {
-		t.Run(tcase.sql, func(t *testing.T) {
-			out, _, err := ExtractSetValues(tcase.sql)
-			if tcase.err != "" {
-				require.Error(t, err, tcase.err)
-			} else if err != nil {
-				require.NoError(t, err)
-			}
-
-			if diff := cmp.Diff(tcase.out, out); diff != "" {
-				t.Error(diff)
-			}
-		})
-	}
-}
-
 func newStrVal(in string) *SQLVal {
 	return NewStrVal([]byte(in))
 }
diff --git a/go/vt/sqlparser/ast.go b/go/vt/sqlparser/ast.go
index 09c85e8ce93..a52dbbce444 100644
--- a/go/vt/sqlparser/ast.go
+++ b/go/vt/sqlparser/ast.go
@@ -132,7 +132,30 @@ type (
 	Set struct {
 		Comments Comments
 		Exprs    SetExprs
-		Scope    string
+	}
+
+	// SetTransaction represents a SET TRANSACTION statement.
+	SetTransaction struct {
+		SQLNode
+		Comments        Comments
+		Scope           string
+		Characteristics []Characteristic
+	}
+
+	// Characteristic is a transaction related change
+	Characteristic interface {
+		SQLNode
+		iChar()
+	}
+
+	// IsolationLevel is self-explanatory in this context
+	IsolationLevel struct {
+		Level string
+	}
+
+	// AccessMode is ReadOnly/ReadWrite
+	AccessMode struct {
+		Mode string
 	}
 
 	// DBDDL represents a CREATE, DROP, or ALTER database statement.
@@ -222,6 +245,7 @@ func (*Insert) iStatement()            {}
 func (*Update) iStatement()            {}
 func (*Delete) iStatement()            {}
 func (*Set) iStatement()               {}
+func (*SetTransaction) iStatement()    {}
 func (*DBDDL) iStatement()             {}
 func (*DDL) iStatement()               {}
 func (*Show) iStatement()              {}
@@ -782,8 +806,9 @@ type SetExprs []*SetExpr
 
 // SetExpr represents a set expression.
 type SetExpr struct {
-	Name ColIdent
-	Expr Expr
+	Scope string
+	Name  ColIdent
+	Expr  Expr
 }
 
 // OnDup represents an ON DUPLICATE KEY clause.
@@ -860,10 +885,22 @@ func (node *Delete) Format(buf *TrackedBuffer) {
 
 // Format formats the node.
 func (node *Set) Format(buf *TrackedBuffer) {
+	buf.astPrintf(node, "set %v%v", node.Comments, node.Exprs)
+}
+
+// Format formats the node.
+func (node *SetTransaction) Format(buf *TrackedBuffer) {
 	if node.Scope == "" {
-		buf.astPrintf(node, "set %v%v", node.Comments, node.Exprs)
+		buf.astPrintf(node, "set %vtransaction ", node.Comments)
 	} else {
-		buf.astPrintf(node, "set %v%s %v", node.Comments, node.Scope, node.Exprs)
+		buf.astPrintf(node, "set %v%s transaction ", node.Comments, node.Scope)
+	}
+
+	for i, char := range node.Characteristics {
+		if i > 0 {
+			buf.WriteString(", ")
+		}
+		buf.astPrintf(node, "%v", char)
 	}
 }
 
@@ -1719,13 +1756,18 @@ func (node SetExprs) Format(buf *TrackedBuffer) {
 
 // Format formats the node.
 func (node *SetExpr) Format(buf *TrackedBuffer) {
+	if node.Scope != "" {
+		buf.WriteString(node.Scope)
+		buf.WriteString(" ")
+	}
 	// We don't have to backtick set variable names.
-	if node.Name.EqualString("charset") || node.Name.EqualString("names") {
+	switch {
+	case node.Name.EqualString("charset") || node.Name.EqualString("names"):
 		buf.astPrintf(node, "%s %v", node.Name.String(), node.Expr)
-	} else if node.Name.EqualString(TransactionStr) {
+	case node.Name.EqualString(TransactionStr):
 		sqlVal := node.Expr.(*SQLVal)
 		buf.astPrintf(node, "%s %s", node.Name.String(), strings.ToLower(string(sqlVal.Val)))
-	} else {
+	default:
 		buf.astPrintf(node, "%v = %v", node.Name, node.Expr)
 	}
 }
@@ -1755,3 +1797,16 @@ func (node TableIdent) Format(buf *TrackedBuffer) {
 func (node ColIdent) AtCount() AtCount {
 	return node.at
 }
+
+func (*IsolationLevel) iChar() {}
+func (*AccessMode) iChar()     {}
+
+// Format formats the node.
+func (node *IsolationLevel) Format(buf *TrackedBuffer) {
+	buf.WriteString("isolation level " + node.Level)
+}
+
+// Format formats the node.
+func (node *AccessMode) Format(buf *TrackedBuffer) {
+	buf.WriteString(node.Mode)
+}
diff --git a/go/vt/sqlparser/constants.go b/go/vt/sqlparser/constants.go
index 13c22dc8be5..74807baa0c7 100644
--- a/go/vt/sqlparser/constants.go
+++ b/go/vt/sqlparser/constants.go
@@ -154,10 +154,11 @@ const (
 	// TransactionStr is the Name for a SET TRANSACTION statement
 	TransactionStr = "transaction"
 
-	IsolationLevelReadUncommitted = "isolation level read uncommitted"
-	IsolationLevelReadCommitted   = "isolation level read committed"
-	IsolationLevelRepeatableRead  = "isolation level repeatable read"
-	IsolationLevelSerializable    = "isolation level serializable"
+	// Transaction isolation levels
+	ReadUncommitted = "read uncommitted"
+	ReadCommitted   = "read committed"
+	RepeatableRead  = "repeatable read"
+	Serializable    = "serializable"
 
 	TxReadOnly  = "read only"
 	TxReadWrite = "read write"
diff --git a/go/vt/sqlparser/expression_rewriting.go b/go/vt/sqlparser/expression_rewriting.go
index be933738aa1..514cafb4636 100644
--- a/go/vt/sqlparser/expression_rewriting.go
+++ b/go/vt/sqlparser/expression_rewriting.go
@@ -24,8 +24,10 @@ import (
 )
 
 // PrepareAST will normalize the query
-func PrepareAST(in Statement, bindVars map[string]*querypb.BindVariable, prefix string) (*RewriteASTResult, error) {
-	Normalize(in, bindVars, prefix)
+func PrepareAST(in Statement, bindVars map[string]*querypb.BindVariable, prefix string, parameterize bool) (*RewriteASTResult, error) {
+	if parameterize {
+		Normalize(in, bindVars, prefix)
+	}
 	return RewriteAST(in)
 }
 
@@ -41,10 +43,17 @@ type BindVarNeeds struct {
 func RewriteAST(in Statement) (*RewriteASTResult, error) {
 	er := newExpressionRewriter()
 	er.shouldRewriteDatabaseFunc = shouldRewriteDatabaseFunc(in)
-	Rewrite(in, er.goingDown, nil)
+	setRewriter := &setNormalizer{}
+	out, ok := Rewrite(in, er.goingDown, setRewriter.rewriteSetComingUp).(Statement)
+	if !ok {
+		return nil, vterrors.Errorf(vtrpc.Code_INTERNAL, "statement rewriting returned a non statement: %s", String(out))
+	}
+	if setRewriter.err != nil {
+		return nil, setRewriter.err
+	}
 
 	r := &RewriteASTResult{
-		AST: in,
+		AST: out,
 	}
 	if _, ok := er.bindVars[LastInsertIDName]; ok {
 		r.NeedLastInsertID = true
diff --git a/go/vt/sqlparser/rewriter.go b/go/vt/sqlparser/rewriter.go
index bb5e386b09c..b9388e5bc28 100644
--- a/go/vt/sqlparser/rewriter.go
+++ b/go/vt/sqlparser/rewriter.go
@@ -579,6 +579,20 @@ func (r *replaceSetExprsItems) inc() {
 	*r++
 }
 
+type replaceSetTransactionCharacteristics int
+
+func (r *replaceSetTransactionCharacteristics) replace(newNode, container SQLNode) {
+	container.(*SetTransaction).Characteristics[int(*r)] = newNode.(Characteristic)
+}
+
+func (r *replaceSetTransactionCharacteristics) inc() {
+	*r++
+}
+
+func replaceSetTransactionComments(newNode, parent SQLNode) {
+	parent.(*SetTransaction).Comments = newNode.(Comments)
+}
+
 func replaceShowOnTable(newNode, parent SQLNode) {
 	parent.(*Show).OnTable = newNode.(TableName)
 }
@@ -842,6 +856,8 @@ func (a *application) apply(parent, node SQLNode, replacer replacerFunc) {
 	// (the order of the cases is alphabetical)
 	switch n := node.(type) {
 	case nil:
+	case *AccessMode:
+
 	case *AliasedExpr:
 		a.apply(node, n.As, replaceAliasedExprAs)
 		a.apply(node, n.Expr, replaceAliasedExprExpr)
@@ -1029,6 +1045,8 @@ func (a *application) apply(parent, node SQLNode, replacer replacerFunc) {
 	case *IsExpr:
 		a.apply(node, n.Expr, replaceIsExprExpr)
 
+	case *IsolationLevel:
+
 	case JoinCondition:
 		a.apply(node, n.On, replaceJoinConditionOn)
 		a.apply(node, n.Using, replaceJoinConditionUsing)
@@ -1158,6 +1176,15 @@ func (a *application) apply(parent, node SQLNode, replacer replacerFunc) {
 			replacerRef.inc()
 		}
 
+	case *SetTransaction:
+		replacerCharacteristics := replaceSetTransactionCharacteristics(0)
+		replacerCharacteristicsB := &replacerCharacteristics
+		for _, item := range n.Characteristics {
+			a.apply(node, item, replacerCharacteristicsB.replace)
+			replacerCharacteristicsB.inc()
+		}
+		a.apply(node, n.Comments, replaceSetTransactionComments)
+
 	case *Show:
 		a.apply(node, n.OnTable, replaceShowOnTable)
 		a.apply(node, n.Table, replaceShowTable)
diff --git a/go/vt/sqlparser/set_normalizer.go b/go/vt/sqlparser/set_normalizer.go
new file mode 100644
index 00000000000..4926708582f
--- /dev/null
+++ b/go/vt/sqlparser/set_normalizer.go
@@ -0,0 +1,81 @@
+/*
+Copyright 2019 The Vitess Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package sqlparser
+
+import (
+	"strings"
+
+	"vitess.io/vitess/go/vt/proto/vtrpc"
+	"vitess.io/vitess/go/vt/vterrors"
+)
+
+type setNormalizer struct {
+	err error
+}
+
+func (n *setNormalizer) rewriteSetComingUp(cursor *Cursor) bool {
+	set, ok := cursor.node.(*Set)
+	if ok {
+		for i, expr := range set.Exprs {
+			exp, err := n.normalizeSetExpr(expr)
+			if err != nil {
+				n.err = err
+				return false
+			}
+			set.Exprs[i] = exp
+		}
+	}
+	return true
+}
+
+func (n *setNormalizer) normalizeSetExpr(in *SetExpr) (*SetExpr, error) {
+	switch in.Name.at { // using switch so we can use break
+	case DoubleAt:
+		if in.Scope != "" {
+			return nil, vterrors.Errorf(vtrpc.Code_INVALID_ARGUMENT, "cannot use scope and @@")
+		}
+		switch {
+		case strings.HasPrefix(in.Name.Lowered(), "session."):
+			in.Name = NewColIdent(in.Name.Lowered()[8:])
+			in.Scope = SessionStr
+		case strings.HasPrefix(in.Name.Lowered(), "global."):
+			in.Name = NewColIdent(in.Name.Lowered()[7:])
+			in.Scope = GlobalStr
+		case strings.HasPrefix(in.Name.Lowered(), "vitess_metadata."):
+			in.Name = NewColIdent(in.Name.Lowered()[16:])
+			in.Scope = VitessMetadataStr
+		default:
+			in.Name.at = NoAt
+			in.Scope = SessionStr
+		}
+		return in, nil
+	case SingleAt:
+		if in.Scope != "" {
+			return nil, vterrors.Errorf(vtrpc.Code_INVALID_ARGUMENT, "cannot mix scope and user defined variables")
+		}
+		return in, nil
+	case NoAt:
+		switch in.Scope {
+		case "":
+			in.Scope = SessionStr
+		case "local":
+			in.Scope = SessionStr
+		}
+		return in, nil
+	}
+	panic("this should never happen")
+}
diff --git a/go/vt/sqlparser/set_normalizer_test.go b/go/vt/sqlparser/set_normalizer_test.go
new file mode 100644
index 00000000000..394ff4f63ee
--- /dev/null
+++ b/go/vt/sqlparser/set_normalizer_test.go
@@ -0,0 +1,84 @@
+/*
+Copyright 2019 The Vitess Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package sqlparser
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestNormalizeSetExpr(t *testing.T) {
+	tests := []struct {
+		in, expected, err string
+	}{{
+		in:       "@@foo = 42",
+		expected: "session foo = 42",
+	}, {
+		in:       "@@session.foo = 42",
+		expected: "session foo = 42",
+	}, {
+		in: "session foo = 42",
+	}, {
+		in: "global foo = 42",
+	}, {
+		in:       "@@global.foo = 42",
+		expected: "global foo = 42",
+	}, {
+		in:  "global @foo = 42",
+		err: "cannot mix scope and user defined variables",
+	}, {
+		in:  "global @@foo = 42",
+		err: "cannot use scope and @@",
+	}, {
+		in:  "session @@foo = 42",
+		err: "cannot use scope and @@",
+	}, {
+		in:       "foo = 42",
+		expected: "session foo = 42",
+	}, {
+		in:       "@@vitess_metadata.foo = 42",
+		expected: "vitess_metadata foo = 42",
+	}, {
+		in:       "@@x.foo = 42",
+		expected: "session `x.foo` = 42",
+	}, {
+		in:       "@@session.x.foo = 42",
+		expected: "session `x.foo` = 42",
+		//}, { TODO: we should support local scope as well
+		//	in:  "local foo = 42",
+		//	expected: "session foo = 42",
+	}}
+	for _, tt := range tests {
+		t.Run(tt.in, func(t *testing.T) {
+			if tt.expected == "" {
+				tt.expected = tt.in
+			}
+
+			statement, err := Parse("set " + tt.in)
+			require.NoError(t, err)
+			rewriter := setNormalizer{}
+			out, err := rewriter.normalizeSetExpr(statement.(*Set).Exprs[0])
+			if tt.err != "" {
+				require.EqualError(t, err, tt.err)
+			} else {
+				require.NoError(t, err)
+				require.Equal(t, tt.expected, String(out))
+			}
+		})
+	}
+}
diff --git a/go/vt/sqlparser/sql.go b/go/vt/sqlparser/sql.go
index 76515b81a27..b89da26f663 100644
--- a/go/vt/sqlparser/sql.go
+++ b/go/vt/sqlparser/sql.go
@@ -79,6 +79,8 @@ type yySymType struct {
 	setExprs             SetExprs
 	updateExpr           *UpdateExpr
 	setExpr              *SetExpr
+	characteristic       Characteristic
+	characteristics      []Characteristic
 	colIdent             ColIdent
 	tableIdent           TableIdent
 	convertType          *ConvertType
@@ -805,34 +807,34 @@ var yyExca = [...]int{
 	1, -1,
 	-2, 0,
 	-1, 3,
-	5, 32,
+	5, 33,
 	-2, 4,
-	-1, 37,
+	-1, 38,
 	33, 299,
 	127, 299,
 	139, 299,
 	164, 313,
 	165, 313,
 	-2, 301,
-	-1, 327,
-	115, 657,
-	-2, 653,
 	-1, 328,
 	115, 658,
 	-2, 654,
-	-1, 397,
-	85, 908,
-	-2, 66,
+	-1, 329,
+	115, 659,
+	-2, 655,
 	-1, 398,
-	85, 825,
+	85, 909,
+	-2, 66,
+	-1, 399,
+	85, 826,
 	-2, 67,
-	-1, 403,
-	85, 793,
-	-2, 619,
-	-1, 405,
-	85, 856,
-	-2, 621,
-	-1, 706,
+	-1, 404,
+	85, 794,
+	-2, 620,
+	-1, 406,
+	85, 857,
+	-2, 622,
+	-1, 707,
 	1, 366,
 	5, 366,
 	12, 366,
@@ -856,1671 +858,1670 @@ var yyExca = [...]int{
 	57, 366,
 	352, 366,
 	-2, 384,
-	-1, 709,
-	54, 47,
-	56, 47,
-	-2, 51,
-	-1, 864,
-	115, 660,
-	-2, 656,
-	-1, 1095,
-	5, 33,
+	-1, 710,
+	54, 48,
+	56, 48,
+	-2, 52,
+	-1, 865,
+	115, 661,
+	-2, 657,
+	-1, 1096,
+	5, 34,
 	-2, 452,
-	-1, 1126,
-	5, 32,
-	-2, 593,
-	-1, 1374,
+	-1, 1127,
 	5, 33,
+	-2, 593,
+	-1, 1375,
+	5, 34,
 	-2, 594,
-	-1, 1427,
-	5, 32,
-	-2, 596,
-	-1, 1507,
+	-1, 1428,
 	5, 33,
+	-2, 596,
+	-1, 1508,
+	5, 34,
 	-2, 597,
 }
 
 const yyPrivate = 57344
 
-const yyLast = 16225
+const yyLast = 16226
 
 var yyAct = [...]int{
 
-	327, 1541, 1335, 1495, 1531, 1129, 661, 979, 1440, 332,
-	1407, 1223, 1147, 358, 1275, 345, 1309, 306, 952, 1276,
-	1022, 1174, 950, 1130, 975, 1272, 57, 988, 1288, 978,
-	557, 1282, 80, 889, 896, 1153, 270, 297, 290, 270,
-	1394, 1247, 808, 900, 827, 1200, 402, 1086, 1191, 992,
-	722, 954, 939, 918, 702, 866, 592, 660, 3, 526,
-	1018, 598, 396, 703, 932, 391, 613, 270, 80, 604,
-	315, 527, 270, 721, 270, 330, 388, 708, 393, 711,
-	675, 56, 298, 299, 300, 301, 1534, 1518, 304, 61,
-	546, 1529, 1505, 1526, 1002, 1336, 1517, 1504, 1041, 676,
-	1264, 1366, 531, 266, 262, 263, 264, 319, 1008, 305,
-	1304, 1305, 1040, 268, 899, 63, 64, 65, 66, 67,
-	370, 1303, 376, 377, 374, 375, 373, 372, 371, 969,
-	568, 82, 83, 84, 970, 971, 378, 379, 723, 1248,
-	724, 82, 83, 84, 390, 258, 586, 303, 256, 528,
-	260, 530, 1039, 1469, 626, 625, 635, 636, 628, 629,
-	630, 631, 632, 633, 634, 627, 1162, 302, 637, 1161,
-	581, 1182, 1163, 1001, 582, 579, 580, 1225, 1250, 1397,
-	82, 83, 84, 1009, 1357, 1355, 296, 797, 574, 575,
-	584, 796, 1227, 794, 1528, 1525, 1496, 1222, 399, 563,
-	933, 565, 1036, 1033, 1034, 585, 1032, 1545, 1488, 993,
-	1549, 571, 1252, 547, 1256, 533, 1251, 260, 1249, 1228,
-	1441, 801, 1449, 1254, 265, 1148, 1150, 795, 798, 995,
-	1226, 785, 1253, 562, 564, 1443, 1298, 1297, 1296, 1043,
-	1046, 82, 83, 84, 259, 1255, 1257, 1219, 529, 536,
-	273, 261, 1053, 1221, 1477, 1052, 1104, 270, 538, 539,
-	1101, 1377, 270, 1233, 548, 995, 257, 1158, 270, 649,
-	650, 1114, 1080, 838, 270, 555, 1038, 717, 561, 80,
-	617, 976, 553, 80, 965, 80, 627, 835, 832, 637,
-	637, 80, 612, 543, 274, 82, 83, 84, 1037, 70,
-	1486, 277, 1458, 1442, 1149, 570, 82, 83, 84, 284,
-	828, 1286, 1503, 611, 610, 1009, 1210, 572, 1543, 560,
-	1268, 1544, 80, 1542, 559, 1470, 1450, 1448, 994, 1180,
-	612, 725, 787, 919, 537, 1266, 600, 71, 1042, 545,
-	588, 589, 919, 282, 1111, 552, 1206, 1207, 1208, 289,
-	1491, 554, 1220, 1044, 1218, 549, 550, 551, 540, 1322,
-	541, 649, 650, 542, 994, 649, 650, 822, 873, 601,
-	630, 631, 632, 633, 634, 627, 275, 610, 637, 611,
-	610, 607, 871, 872, 870, 1509, 270, 270, 270, 1403,
-	82, 83, 84, 612, 829, 80, 612, 995, 841, 842,
-	1402, 80, 602, 286, 278, 558, 287, 288, 294, 701,
-	1195, 1194, 279, 281, 291, 1209, 276, 293, 292, 325,
-	1214, 1211, 1202, 1212, 1205, 525, 1201, 82, 83, 84,
-	1203, 1204, 626, 625, 635, 636, 628, 629, 630, 631,
-	632, 633, 634, 627, 1213, 1183, 637, 54, 1511, 611,
-	610, 823, 678, 680, 682, 684, 686, 688, 689, 869,
-	1487, 998, 1421, 700, 710, 709, 612, 999, 1099, 715,
-	1098, 679, 681, 719, 685, 687, 255, 690, 628, 629,
-	630, 631, 632, 633, 634, 627, 1550, 1087, 637, 611,
-	610, 532, 1400, 1241, 1192, 1063, 994, 856, 858, 859,
-	813, 991, 989, 857, 990, 591, 612, 1077, 1078, 1079,
-	713, 987, 993, 626, 625, 635, 636, 628, 629, 630,
-	631, 632, 633, 634, 627, 399, 270, 637, 1551, 1455,
-	783, 80, 1454, 786, 1318, 788, 270, 270, 80, 80,
-	80, 385, 386, 996, 270, 1446, 1527, 270, 837, 591,
-	270, 806, 807, 714, 270, 716, 80, 22, 1100, 1513,
-	591, 80, 80, 80, 270, 80, 80, 58, 534, 535,
-	82, 83, 84, 1285, 891, 80, 80, 82, 83, 84,
-	54, 1165, 82, 83, 84, 902, 836, 812, 626, 625,
-	635, 636, 628, 629, 630, 631, 632, 633, 634, 627,
-	810, 1372, 637, 733, 80, 611, 610, 1273, 1093, 270,
-	1285, 611, 610, 789, 790, 80, 1457, 310, 843, 1446,
-	1499, 799, 612, 802, 390, 1446, 591, 805, 612, 941,
-	944, 945, 946, 942, 867, 943, 947, 936, 890, 1289,
-	1290, 818, 1224, 1446, 1478, 1446, 1445, 892, 625, 635,
-	636, 628, 629, 630, 631, 632, 633, 634, 627, 80,
-	862, 637, 1392, 1391, 864, 348, 347, 350, 351, 352,
-	353, 1379, 591, 845, 349, 354, 1376, 591, 909, 912,
-	1154, 860, 1328, 1327, 920, 935, 852, 1324, 1325, 1324,
-	1323, 1154, 80, 80, 1093, 591, 936, 591, 24, 713,
-	270, 902, 591, 1326, 328, 732, 731, 1236, 270, 270,
-	1166, 936, 270, 270, 24, 968, 270, 270, 270, 80,
-	24, 904, 1124, 1117, 936, 893, 894, 1125, 1116, 928,
-	929, 1093, 80, 527, 960, 1285, 81, 959, 962, 712,
-	271, 916, 714, 271, 712, 712, 718, 54, 863, 1426,
-	839, 800, 1093, 1519, 1409, 651, 652, 653, 654, 655,
-	656, 657, 658, 54, 810, 1003, 1384, 1023, 1314, 54,
-	1169, 271, 81, 1019, 958, 312, 271, 934, 271, 905,
-	906, 966, 963, 911, 914, 915, 270, 80, 1014, 80,
-	961, 1045, 983, 1013, 967, 270, 270, 270, 270, 270,
-	1410, 270, 270, 1024, 1026, 270, 80, 1536, 927, 1289,
-	1290, 930, 931, 941, 944, 945, 946, 942, 1532, 943,
-	947, 1316, 270, 1295, 54, 1292, 1273, 270, 1196, 270,
-	270, 833, 804, 851, 270, 1294, 1004, 1005, 1006, 1007,
-	1020, 1021, 1141, 1139, 1138, 1137, 1523, 1142, 1140, 399,
-	316, 317, 1015, 1016, 1017, 1010, 1011, 1012, 1060, 1516,
-	1232, 1065, 980, 1027, 1143, 1521, 945, 946, 1075, 1074,
-	605, 1187, 1047, 1048, 1049, 1050, 1051, 605, 1054, 1055,
-	593, 1068, 1056, 606, 867, 864, 603, 730, 556, 1179,
-	606, 1493, 594, 1088, 1492, 1424, 1177, 1171, 1370, 1058,
-	1070, 1069, 1405, 1029, 1059, 803, 949, 313, 314, 307,
-	1463, 1064, 308, 626, 625, 635, 636, 628, 629, 630,
-	631, 632, 633, 634, 627, 1073, 1082, 637, 58, 1462,
-	1412, 1154, 583, 1072, 1538, 1537, 1538, 270, 270, 270,
-	270, 270, 1105, 1102, 826, 1131, 608, 1474, 1398, 270,
-	834, 60, 270, 62, 55, 1, 270, 1530, 1337, 1406,
-	270, 271, 1035, 1494, 1439, 1076, 271, 1308, 986, 863,
-	977, 1110, 271, 69, 524, 68, 1485, 1164, 271, 80,
-	821, 569, 1155, 81, 985, 984, 1167, 81, 1170, 81,
-	1126, 1132, 1175, 1175, 1135, 81, 1156, 1447, 1157, 1396,
-	1144, 1133, 1134, 997, 1136, 1181, 1000, 1152, 1315, 904,
-	1178, 1490, 1091, 1092, 1176, 738, 736, 737, 735, 1159,
-	740, 739, 734, 283, 394, 948, 81, 80, 80, 726,
-	1025, 1108, 609, 1186, 72, 1188, 1189, 1190, 1217, 865,
-	1172, 1173, 874, 875, 876, 877, 878, 879, 880, 881,
-	882, 883, 884, 885, 886, 887, 888, 80, 1216, 1031,
-	831, 280, 577, 1193, 578, 285, 645, 1071, 1160, 1199,
-	400, 1280, 270, 840, 597, 1461, 1411, 1109, 672, 1215,
-	917, 80, 333, 855, 346, 343, 344, 846, 1123, 619,
-	271, 271, 271, 331, 323, 705, 698, 924, 940, 81,
-	890, 938, 937, 1230, 1231, 81, 389, 1291, 1287, 980,
-	704, 1235, 1365, 1184, 1185, 1468, 1239, 850, 26, 59,
-	318, 19, 18, 17, 20, 16, 334, 15, 80, 80,
-	1274, 1240, 14, 1258, 1131, 1265, 544, 1246, 30, 1277,
-	21, 13, 1259, 12, 11, 10, 9, 8, 7, 1234,
-	6, 5, 80, 4, 309, 23, 2, 1068, 0, 0,
-	0, 864, 0, 0, 1293, 1284, 0, 80, 0, 80,
-	80, 0, 0, 1175, 1175, 0, 1307, 0, 0, 0,
-	1300, 0, 0, 1299, 0, 1279, 0, 0, 1321, 0,
-	0, 1302, 0, 0, 1312, 1313, 1306, 270, 1311, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 1319,
-	1320, 1238, 0, 0, 0, 0, 0, 270, 0, 0,
-	0, 0, 0, 80, 0, 1338, 80, 80, 80, 270,
-	271, 0, 0, 0, 80, 81, 0, 270, 1330, 0,
-	271, 271, 81, 81, 81, 1269, 0, 0, 271, 0,
-	0, 271, 0, 1331, 271, 1333, 0, 0, 271, 1346,
-	81, 1343, 1344, 0, 357, 81, 81, 81, 271, 81,
-	81, 1345, 0, 1353, 1329, 0, 0, 0, 0, 81,
-	81, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	0, 1083, 1084, 1085, 1332, 1131, 79, 980, 0, 980,
-	1371, 0, 0, 0, 0, 0, 1342, 80, 81, 1381,
-	0, 1380, 0, 271, 1167, 80, 0, 0, 1390, 81,
-	0, 0, 0, 0, 359, 51, 0, 0, 0, 0,
-	80, 0, 401, 0, 0, 0, 0, 80, 0, 0,
-	0, 0, 0, 1350, 1351, 0, 1352, 0, 0, 1354,
-	0, 1356, 1414, 635, 636, 628, 629, 630, 631, 632,
-	633, 634, 627, 81, 1238, 637, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 0, 51, 80, 80, 0,
-	80, 0, 0, 1420, 311, 80, 1277, 80, 80, 80,
-	270, 0, 1425, 80, 0, 0, 81, 81, 1432, 0,
-	0, 0, 0, 0, 271, 1393, 0, 923, 1438, 1444,
-	80, 270, 271, 271, 1451, 0, 271, 271, 0, 0,
-	271, 271, 271, 81, 1452, 1433, 1453, 1434, 1436, 1437,
-	0, 0, 1399, 1427, 1401, 0, 81, 980, 0, 0,
-	1277, 1475, 1484, 0, 0, 0, 0, 80, 1483, 0,
-	1459, 1482, 0, 0, 0, 0, 647, 0, 80, 80,
-	1413, 0, 0, 0, 0, 0, 1498, 1408, 1497, 0,
-	1501, 0, 0, 0, 0, 0, 0, 0, 80, 0,
-	1506, 0, 566, 0, 1131, 0, 1476, 0, 1460, 270,
-	271, 81, 0, 81, 0, 0, 0, 80, 0, 271,
-	271, 271, 271, 271, 0, 271, 271, 1242, 1243, 271,
-	81, 1515, 0, 706, 0, 0, 0, 1520, 1522, 0,
-	80, 1260, 1261, 0, 1262, 1263, 271, 1369, 0, 0,
-	0, 271, 0, 271, 271, 1535, 1270, 1271, 271, 0,
-	1546, 0, 0, 401, 0, 0, 0, 401, 0, 401,
-	0, 0, 0, 0, 0, 401, 0, 0, 0, 0,
-	1524, 0, 0, 0, 0, 0, 1510, 626, 625, 635,
-	636, 628, 629, 630, 631, 632, 633, 634, 627, 1368,
-	0, 637, 0, 0, 0, 0, 615, 0, 1408, 980,
-	1363, 0, 0, 0, 0, 0, 0, 0, 0, 1317,
-	0, 0, 0, 567, 0, 0, 0, 567, 0, 567,
-	0, 0, 0, 0, 0, 567, 0, 0, 0, 626,
-	625, 635, 636, 628, 629, 630, 631, 632, 633, 634,
-	627, 0, 0, 637, 321, 0, 51, 1362, 0, 0,
-	0, 271, 271, 271, 271, 271, 0, 0, 0, 0,
-	0, 646, 0, 271, 648, 0, 271, 1361, 0, 401,
-	271, 1348, 0, 0, 271, 727, 0, 626, 625, 635,
-	636, 628, 629, 630, 631, 632, 633, 634, 627, 0,
-	0, 637, 659, 81, 663, 664, 665, 666, 667, 668,
-	669, 670, 671, 0, 674, 677, 677, 677, 683, 677,
-	677, 683, 677, 691, 692, 693, 694, 695, 696, 697,
-	0, 707, 0, 590, 626, 625, 635, 636, 628, 629,
-	630, 631, 632, 633, 634, 627, 0, 0, 637, 0,
-	1360, 81, 81, 0, 626, 625, 635, 636, 628, 629,
-	630, 631, 632, 633, 634, 627, 0, 868, 637, 626,
-	625, 635, 636, 628, 629, 630, 631, 632, 633, 634,
-	627, 81, 0, 637, 0, 573, 0, 576, 0, 0,
-	0, 0, 0, 587, 0, 0, 271, 0, 0, 0,
-	1415, 1416, 1417, 1418, 1419, 81, 0, 0, 1422, 1423,
-	0, 0, 0, 0, 0, 401, 0, 0, 0, 0,
-	0, 0, 401, 401, 401, 0, 0, 626, 625, 635,
-	636, 628, 629, 630, 631, 632, 633, 634, 627, 0,
-	401, 637, 0, 0, 0, 401, 401, 401, 0, 401,
-	401, 0, 81, 81, 706, 0, 0, 0, 706, 401,
-	401, 0, 706, 0, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 567, 81, 0, 0, 0,
-	0, 0, 567, 567, 567, 0, 0, 0, 847, 0,
-	0, 81, 0, 81, 81, 0, 0, 0, 0, 615,
-	567, 0, 401, 0, 0, 567, 567, 567, 0, 567,
-	567, 0, 0, 0, 0, 0, 0, 0, 0, 567,
-	567, 271, 0, 0, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	0, 271, 0, 895, 0, 0, 0, 81, 0, 0,
-	81, 81, 81, 271, 0, 0, 0, 0, 81, 921,
-	0, 271, 595, 599, 0, 0, 0, 0, 0, 0,
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+	103, 0, 225, 249, 250, 0, 0, 104, 123, 117,
+	187, 121, 163, 100, 132, 215, 140, 147, 194, 253,
+	177, 200, 107, 239, 216, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 86, 95, 144, 252, 192, 120,
+	241, 0, 0, 113, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 88, 89, 96, 102,
+	108, 112, 116, 119, 125, 128, 131, 133, 134, 135,
+	138, 149, 152, 153, 154, 155, 165, 166, 167, 169,
+	172, 173, 174, 175, 176, 179, 181, 182, 183, 184,
+	185, 186, 193, 196, 202, 203, 204, 205, 206, 207,
+	208, 210, 211, 212, 213, 219, 222, 228, 229, 238,
+	245, 248, 171, 0, 0, 0, 0, 0, 0, 0,
+	0, 115, 0, 0, 0, 0, 0, 143, 0, 0,
+	145, 0, 0, 217, 159, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 83, 84, 85, 0, 0, 0, 0, 0,
+	0, 0, 0, 105, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 124, 0,
+	0, 0, 273, 0, 0, 0, 0, 190, 0, 221,
+	127, 142, 101, 139, 87, 97, 0, 126, 168, 197,
+	201, 0, 0, 0, 109, 0, 199, 178, 237, 0,
+	180, 198, 146, 227, 191, 236, 246, 247, 224, 244,
+	251, 214, 90, 223, 235, 106, 209, 92, 233, 220,
+	157, 136, 137, 91, 0, 195, 114, 122, 111, 170,
+	230, 231, 110, 254, 98, 243, 94, 99, 242, 164,
+	226, 234, 158, 151, 93, 232, 156, 150, 141, 118,
+	129, 188, 148, 189, 130, 161, 160, 162, 0, 0,
+	0, 218, 240, 255, 103, 0, 225, 249, 250, 0,
+	0, 104, 123, 117, 187, 121, 163, 100, 132, 215,
+	140, 147, 194, 253, 177, 200, 107, 239, 216, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 86, 95,
+	144, 252, 192, 120, 241, 0, 0, 113, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	88, 89, 96, 102, 108, 112, 116, 119, 125, 128,
+	131, 133, 134, 135, 138, 149, 152, 153, 154, 155,
+	165, 166, 167, 169, 172, 173, 174, 175, 176, 179,
+	181, 182, 183, 184, 185, 186, 193, 196, 202, 203,
+	204, 205, 206, 207, 208, 210, 211, 212, 213, 219,
+	222, 228, 229, 238, 245, 248,
 }
 var yyPact = [...]int{
 
-	2438, -1000, -271, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
-	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
-	-1000, -1000, 913, 946, -1000, -1000, -1000, -1000, -1000, -1000,
-	244, 11512, 20, 125, -22, 15539, 124, 183, 15873, -1000,
-	16, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -55, -75,
-	-1000, 708, -1000, -1000, -1000, -1000, -1000, 892, 896, 769,
-	887, 809, -1000, 8160, 87, 87, 15205, 6824, -1000, -1000,
-	332, 15873, 121, 15873, -152, 84, 84, 84, -1000, -1000,
+	2356, -1000, -273, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
+	-1000, -1000, -1000, 1018, 1069, -1000, -1000, -1000, -1000, -1000,
+	-1000, 320, 11513, -2, 141, -25, 15540, 140, 136, 15874,
+	-1000, -29, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -98,
+	-115, -1000, 770, -1000, -1000, -1000, -1000, -1000, 1013, 1016,
+	839, 1004, 913, -1000, 8161, 106, 106, 15206, 6825, -1000,
+	-1000, 530, 15874, 130, 15874, -160, 87, 87, 87, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
@@ -2537,23 +2538,23 @@ var yyPact = [...]int{
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
-	-1000, -1000, -1000, -1000, -1000, 123, 15873, 524, 524, 240,
-	-1000, 15873, 82, 524, 82, 82, 82, 15873, -1000, 167,
-	-1000, -1000, -1000, 15873, 524, 858, 312, 73, 4395, -1000,
-	178, -1000, 4395, 24, 4395, -52, 920, 25, -17, -1000,
-	4395, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
-	-1000, -1000, -1000, -1000, -1000, 448, 861, 9508, 9508, 913,
-	-1000, 708, -1000, -1000, -1000, 849, -1000, -1000, 313, 935,
-	-1000, 11178, 165, -1000, 9508, 2418, 525, -1000, -1000, 525,
-	-1000, -1000, 153, -1000, -1000, 10510, 10510, 10510, 10510, 10510,
-	10510, 10510, 10510, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
-	-1000, -1000, -1000, -1000, -1000, -1000, -1000, 525, -1000, 9174,
-	525, 525, 525, 525, 525, 525, 525, 525, 9508, 525,
-	525, 525, 525, 525, 525, 525, 525, 525, 525, 525,
-	525, 525, 525, 525, 525, 14864, 13862, 15873, 688, 499,
-	-1000, -1000, 162, 690, 6477, -98, -1000, -1000, -1000, 246,
-	13194, -1000, -1000, -1000, 857, -1000, -1000, -1000, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
+	-1000, -1000, -1000, -1000, -1000, -1000, 138, 15874, 596, 596,
+	254, -1000, 15874, 83, 596, 83, 83, 83, 15874, -1000,
+	188, -1000, -1000, -1000, 15874, 596, 947, 369, 52, 4396,
+	-1000, 177, -1000, 4396, 33, 4396, -35, 1026, -28, -41,
+	-1000, 4396, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
+	-1000, -1000, -1000, -1000, -1000, -1000, 501, 972, 9509, 9509,
+	1018, -1000, 770, -1000, -1000, -1000, 948, -1000, -1000, 357,
+	1058, -1000, 11179, 185, -1000, 9509, 345, 532, -1000, -1000,
+	532, -1000, -1000, 172, -1000, -1000, 10511, 10511, 10511, 10511,
+	10511, 10511, 10511, 10511, -1000, -1000, -1000, -1000, -1000, -1000,
+	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, 532, -1000,
+	9175, 532, 532, 532, 532, 532, 532, 532, 532, 9509,
+	532, 532, 532, 532, 532, 532, 532, 532, 532, 532,
+	532, 532, 532, 532, 532, 532, 14865, 13863, 15874, 816,
+	813, -1000, -1000, 182, 787, 6478, -130, -1000, -1000, -1000,
+	283, 13195, -1000, -1000, -1000, 946, -1000, -1000, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
@@ -2564,216 +2565,205 @@ var yyPact = [...]int{
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
-	-1000, -1000, -1000, -1000, 649, 15873, -1000, 2882, -1000, 524,
-	4395, 103, 524, 255, 524, 15873, 15873, 4395, 4395, 4395,
-	31, 65, 61, 15873, 695, 92, 15873, 882, 779, 15873,
-	524, 524, -1000, 5783, -1000, 4395, 312, -1000, 438, 9508,
-	4395, 4395, 4395, 15873, 4395, 4395, -1000, -1000, -1000, 356,
-	-1000, -1000, -1000, -1000, 4395, 4395, -1000, 933, 299, -1000,
-	-1000, -1000, -1000, 9508, 195, -1000, 778, -1000, -1000, -1000,
-	-1000, -1000, -1000, 941, 192, 530, 158, 694, -1000, 374,
-	892, 448, 809, 12860, 789, -1000, -1000, -1000, 15873, -1000,
-	9508, 9508, 426, -1000, 14530, -1000, -1000, 5436, 200, 10510,
-	392, 289, 10510, 10510, 10510, 10510, 10510, 10510, 10510, 10510,
-	10510, 10510, 10510, 10510, 10510, 10510, 10510, 512, -1000, -1000,
-	-1000, -1000, -1000, -1000, -1000, -1000, 524, -1000, 708, 604,
-	604, 180, 180, 180, 180, 180, 180, 180, 10844, 7158,
-	448, 645, 304, 9174, 8160, 8160, 9508, 9508, 8828, 8494,
-	8160, 856, 252, 304, 15873, -1000, -1000, 10176, -1000, -1000,
-	-1000, -1000, -1000, 448, -1000, -1000, -1000, -1000, -1000, -1000,
-	-1000, 15873, 15873, 8160, 8160, 8160, 8160, 8160, 44, 15873,
-	-1000, 655, 770, -1000, -1000, -1000, 884, 12192, 12526, 44,
-	683, 13862, 15873, -1000, -1000, 13862, 15873, 5089, 6130, 690,
-	-98, 659, -1000, -108, -105, 7492, 171, -1000, -1000, -1000,
-	-1000, 4048, 369, 486, 390, -45, -1000, -1000, -1000, 710,
-	-1000, 710, 710, 710, 710, -10, -10, -10, -10, -1000,
-	-1000, -1000, -1000, -1000, 738, 733, -1000, 710, 710, 710,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
-	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, 718, 718,
-	718, 712, 712, 750, -1000, 15873, 4395, 880, 4395, -1000,
-	83, -1000, -1000, -1000, 15873, 15873, 15873, 15873, 15873, 132,
-	15873, 15873, 689, -1000, 15873, 4395, -1000, -1000, -1000, -1000,
-	-1000, -1000, -1000, -1000, 304, -1000, -1000, -1000, -1000, -1000,
-	-1000, 15873, -1000, -1000, -1000, -1000, 15873, 312, 15873, 15873,
-	304, -1000, 433, 15873, -1000, 822, 9508, 9508, 5783, 9508,
-	-1000, -1000, -1000, 861, -1000, 856, 914, -1000, 834, 833,
-	8160, -1000, -1000, 200, 301, -1000, -1000, 436, -1000, -1000,
-	-1000, -1000, 157, 525, -1000, 1653, -1000, -1000, -1000, -1000,
-	392, 10510, 10510, 10510, 336, 1653, 817, 1255, 551, 180,
-	268, 268, 179, 179, 179, 179, 179, 378, 378, -1000,
-	-1000, -1000, 448, -1000, -1000, -1000, 448, 8160, 8160, 675,
-	-1000, -1000, 9508, -1000, 448, 638, 638, 414, 536, 249,
-	932, 638, 245, 931, 638, 638, 8160, 261, -1000, 9508,
-	448, -1000, 156, -1000, 492, 672, 667, 638, 448, 448,
-	638, 638, 692, 525, -1000, 15873, 13862, 13862, 13862, 13862,
-	13862, -1000, 802, 801, -1000, 800, 799, 821, 15873, -1000,
-	640, 12192, 174, 525, -1000, 14196, -1000, -1000, 919, 13862,
-	668, -1000, 668, -1000, 152, -1000, -1000, 659, -98, -72,
-	-1000, -1000, -1000, -1000, 304, -1000, 519, 654, 3701, -1000,
-	-1000, -1000, -1000, -1000, -1000, -1000, 715, 524, -1000, 869,
-	201, 237, 524, 868, -1000, -1000, -1000, 860, -1000, 258,
-	-48, -1000, -1000, 382, -10, -10, -1000, -1000, 171, 841,
-	171, 171, 171, 432, 432, -1000, -1000, -1000, -1000, 348,
-	-1000, -1000, -1000, 347, -1000, 775, 15873, 4395, -1000, -1000,
-	-1000, -1000, 288, 288, 225, -1000, -1000, -1000, -1000, -1000,
-	-1000, -1000, -1000, -1000, -1000, -1000, 41, 588, -1000, -1000,
-	-1000, -1000, 15, 30, 90, -1000, 4395, -1000, 299, 299,
-	-1000, -1000, -1000, -1000, -1000, 820, 304, 304, 148, -1000,
-	-1000, 15873, -1000, -1000, -1000, -1000, 696, -1000, -1000, -1000,
-	4742, 8160, -1000, 336, 1653, 417, -1000, 10510, 10510, -1000,
-	-1000, 638, 638, 8160, 304, -1000, -1000, -1000, 28, 512,
-	28, 10510, 10510, -1000, 10510, 10510, -1000, -164, 552, 251,
-	-1000, 9508, 238, -1000, 5783, -1000, 10510, 10510, -1000, -1000,
-	-1000, -1000, -1000, 773, 15873, 525, -1000, 12192, 15873, 679,
-	-1000, 226, 770, 756, 772, 586, -1000, -1000, -1000, -1000,
-	792, -1000, 780, -1000, -1000, -1000, -1000, -1000, 111, 110,
-	109, 15873, -1000, 913, 9508, 668, -1000, -1000, 182, -1000,
-	-1000, -117, -132, -1000, -1000, -1000, 4048, -1000, 4048, 15873,
-	66, -1000, 524, 524, -1000, -1000, -1000, 713, 768, 10510,
-	-1000, -1000, -1000, 477, 171, 171, -1000, 248, -1000, -1000,
-	-1000, 633, -1000, 631, 647, 626, 15873, -1000, -1000, -1000,
+	-1000, -1000, -1000, -1000, -1000, 764, 15874, -1000, 2030, -1000,
+	596, 4396, 115, 596, 317, 596, 15874, 15874, 4396, 4396,
+	4396, 5, 53, 23, 15874, 786, 113, 15874, 996, 873,
+	15874, 596, 596, -1000, 5784, -1000, 4396, 369, -1000, 522,
+	9509, 4396, 4396, 4396, 15874, 4396, 4396, -1000, -1000, -1000,
+	373, -1000, -1000, -1000, -1000, 4396, 4396, -1000, 1057, 300,
+	-1000, -1000, -1000, -1000, 9509, 222, -1000, 872, -1000, -1000,
+	-1000, -1000, -1000, -1000, 1063, 239, 640, 179, 785, -1000,
+	607, 1013, 501, 913, 12861, 892, -1000, -1000, -1000, 15874,
+	-1000, 9509, 9509, 574, -1000, 14531, -1000, -1000, 5437, 244,
+	10511, 480, 304, 10511, 10511, 10511, 10511, 10511, 10511, 10511,
+	10511, 10511, 10511, 10511, 10511, 10511, 10511, 10511, 667, -1000,
+	-1000, -1000, -1000, -1000, -1000, -1000, -1000, 596, -1000, 770,
+	795, 795, 195, 195, 195, 195, 195, 195, 195, 10845,
+	7159, 501, 718, 288, 9175, 8161, 8161, 9509, 9509, 8829,
+	8495, 8161, 965, 292, 288, 15874, -1000, -1000, 10177, -1000,
+	-1000, -1000, -1000, -1000, 501, -1000, -1000, -1000, -1000, -1000,
+	-1000, -1000, 15874, 15874, 8161, 8161, 8161, 8161, 8161, 46,
+	15874, -1000, 796, 842, -1000, -1000, -1000, 998, 12193, 12527,
+	46, 730, 13863, 15874, -1000, -1000, 13863, 15874, 5090, 6131,
+	-130, -1000, 738, -1000, -122, -135, 7493, 181, -1000, -1000,
+	-1000, -1000, 4049, 285, 604, 390, -91, -1000, -1000, -1000,
+	794, -1000, 794, 794, 794, 794, -57, -57, -57, -57,
+	-1000, -1000, -1000, -1000, -1000, 860, 851, -1000, 794, 794,
+	794, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
+	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, 844,
+	844, 844, 826, 826, 850, -1000, 15874, 4396, 994, 4396,
+	-1000, 84, -1000, -1000, -1000, 15874, 15874, 15874, 15874, 15874,
+	148, 15874, 15874, 782, -1000, 15874, 4396, -1000, -1000, -1000,
+	-1000, -1000, -1000, -1000, -1000, 288, -1000, -1000, -1000, -1000,
+	-1000, -1000, 15874, -1000, -1000, -1000, -1000, 15874, 369, 15874,
+	15874, 288, -1000, 521, 15874, -1000, 925, 9509, 9509, 5784,
+	9509, -1000, -1000, -1000, 972, -1000, 965, 1015, -1000, 937,
+	936, 8161, -1000, -1000, 244, 309, -1000, -1000, 508, -1000,
+	-1000, -1000, -1000, 178, 532, -1000, 1710, -1000, -1000, -1000,
+	-1000, 480, 10511, 10511, 10511, 127, 1710, 1668, 496, 1745,
+	195, 531, 531, 220, 220, 220, 220, 220, 468, 468,
+	-1000, -1000, -1000, 501, -1000, -1000, -1000, 501, 8161, 8161,
+	781, -1000, -1000, 9509, -1000, 501, 691, 691, 632, 467,
+	276, 1053, 691, 262, 1028, 691, 691, 8161, 340, -1000,
+	9509, 501, -1000, 175, -1000, 403, 780, 776, 691, 501,
+	501, 691, 691, 799, 532, -1000, 15874, 13863, 13863, 13863,
+	13863, 13863, -1000, 902, 901, -1000, 887, 886, 920, 15874,
+	-1000, 713, 12193, 165, 532, -1000, 14197, -1000, -1000, 1024,
+	13863, 711, -1000, 711, -1000, 170, -1000, -1000, 738, -130,
+	-55, -1000, -1000, -1000, -1000, 288, -1000, 693, 733, 3702,
+	-1000, -1000, -1000, -1000, -1000, -1000, -1000, 838, 596, -1000,
+	984, 228, 191, 596, 983, -1000, -1000, -1000, 952, -1000,
+	315, -94, -1000, -1000, 481, -57, -57, -1000, -1000, 181,
+	945, 181, 181, 181, 499, 499, -1000, -1000, -1000, -1000,
+	470, -1000, -1000, -1000, 448, -1000, 871, 15874, 4396, -1000,
+	-1000, -1000, -1000, 273, 273, 224, -1000, -1000, -1000, -1000,
+	-1000, -1000, -1000, -1000, -1000, -1000, -1000, 45, 797, -1000,
+	-1000, -1000, -1000, -33, -11, 110, -1000, 4396, -1000, 300,
+	300, -1000, -1000, -1000, -1000, -1000, 918, 288, 288, 167,
+	-1000, -1000, 15874, -1000, -1000, -1000, -1000, 790, -1000, -1000,
+	-1000, 4743, 8161, -1000, 127, 1710, 418, -1000, 10511, 10511,
+	-1000, -1000, 691, 691, 8161, 288, -1000, -1000, -1000, 124,
+	667, 124, 10511, 10511, -1000, 10511, 10511, -1000, -172, 644,
+	274, -1000, 9509, 537, -1000, 5784, -1000, 10511, 10511, -1000,
+	-1000, -1000, -1000, -1000, 869, 15874, 532, -1000, 12193, 15874,
+	724, -1000, 277, 842, 849, 868, 864, -1000, -1000, -1000,
+	-1000, 900, -1000, 894, -1000, -1000, -1000, -1000, -1000, 128,
+	121, 118, 15874, -1000, 1018, 9509, 711, -1000, -1000, 207,
+	-1000, -1000, -140, -147, -1000, -1000, -1000, 4049, -1000, 4049,
+	15874, 66, -1000, 596, 596, -1000, -1000, -1000, 829, 867,
+	10511, -1000, -1000, -1000, 592, 181, 181, -1000, 438, -1000,
+	-1000, -1000, 689, -1000, 686, 715, 655, 15874, -1000, -1000,
 	-1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
-	-1000, -1000, -1000, -1000, -1000, -1000, 15873, -1000, -1000, -1000,
-	-1000, -1000, 15873, -172, 524, 15873, 15873, 15873, 15873, -1000,
-	312, 312, -1000, 5783, -1000, 919, 13862, -1000, -1000, 448,
-	-1000, 10510, 1653, 1653, -1000, -1000, -1000, 448, 710, 710,
-	-1000, 710, 712, -1000, 710, 7, 710, 6, 448, 448,
-	1711, 1638, 1618, 1571, 525, -159, -1000, 304, 9508, -1000,
-	1523, 1471, -1000, 871, 554, 545, -1000, -1000, 7826, 448,
-	620, 146, 615, -1000, 913, 15873, 9508, -1000, -1000, 9508,
-	711, -1000, 9508, -1000, -1000, -1000, 525, 525, 525, 615,
-	892, 304, -1000, -1000, -1000, -1000, 3701, -1000, 606, -1000,
-	710, -1000, -1000, -1000, 15873, -36, 939, 1653, -1000, -1000,
-	-1000, -1000, -1000, -10, 430, -10, 337, -1000, 326, 4395,
-	-1000, -1000, -1000, -1000, 876, -1000, 5783, -1000, -1000, 699,
-	746, -1000, -1000, -1000, -1000, 917, 581, -1000, 1653, -1000,
-	-1000, 122, -1000, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
-	10510, 10510, 10510, 10510, 10510, 892, 400, 304, 10510, 10510,
-	867, -1000, 525, -1000, -1000, 714, 15873, 15873, -1000, 15873,
-	892, -1000, 304, 304, 15873, 304, 13528, 15873, 15873, 11846,
-	-1000, 166, 15873, -1000, 589, -1000, 194, -1000, -125, 171,
-	-1000, 171, 475, 472, -1000, 525, 560, -1000, 217, 15873,
-	15873, 915, 894, -1000, -1000, 492, 492, 492, 492, 58,
-	448, -1000, 492, 492, 938, -1000, 525, -1000, 708, 139,
-	-1000, -1000, -1000, 587, 569, -1000, 569, 569, 174, 166,
-	-1000, 524, 215, 398, -1000, 63, 15873, 281, 866, -1000,
-	863, -1000, -1000, -1000, -1000, -1000, 40, 5783, 4048, 563,
-	-1000, -1000, 9508, 9508, -1000, -1000, -1000, -1000, 448, 47,
-	-176, -1000, -1000, -1000, 15873, 545, 448, 15873, -1000, -1000,
-	-1000, -1000, -1000, -1000, -1000, 322, -1000, -1000, 15873, -1000,
-	-1000, 386, -1000, -1000, 503, -1000, 15873, -1000, -1000, 588,
-	304, 529, -1000, 819, -170, -182, 517, -1000, -1000, -1000,
-	698, -1000, -1000, 40, 830, -172, -1000, 806, -1000, 15873,
-	-1000, 37, -1000, -174, 489, 35, -177, 765, 525, -183,
-	754, -1000, 925, 9842, -1000, -1000, 927, 177, 177, 492,
-	448, -1000, -1000, -1000, 70, 457, -1000, -1000, -1000, -1000,
-	-1000, -1000,
+	-1000, -1000, -1000, -1000, -1000, -1000, -1000, 15874, -1000, -1000,
+	-1000, -1000, -1000, 15874, -179, 596, 15874, 15874, 15874, 15874,
+	-1000, 369, 369, -1000, 5784, -1000, 1024, 13863, -1000, -1000,
+	501, -1000, 10511, 1710, 1710, -1000, -1000, -1000, 501, 794,
+	794, -1000, 794, 826, -1000, 794, -38, 794, -39, 501,
+	501, 1620, 1572, 1521, 566, 532, -167, -1000, 288, 9509,
+	-1000, 712, 381, -1000, 986, 625, 639, -1000, -1000, 7827,
+	501, 649, 157, 646, -1000, 1018, 15874, 9509, -1000, -1000,
+	9509, 800, -1000, 9509, -1000, -1000, -1000, 532, 532, 532,
+	646, 1013, 288, -1000, -1000, -1000, -1000, 3702, -1000, 641,
+	-1000, 794, -1000, -1000, -1000, 15874, -84, 1062, 1710, -1000,
+	-1000, -1000, -1000, -1000, -57, 498, -57, 432, -1000, 427,
+	4396, -1000, -1000, -1000, -1000, 988, -1000, 5784, -1000, -1000,
+	793, 843, -1000, -1000, -1000, -1000, 1022, 698, -1000, 1710,
+	-1000, -1000, 88, -1000, -1000, -1000, -1000, -1000, -1000, -1000,
+	-1000, 10511, 10511, 10511, 10511, 10511, 1013, 494, 288, 10511,
+	10511, 981, -1000, 532, -1000, -1000, 827, 15874, 15874, -1000,
+	15874, 1013, -1000, 288, 288, 15874, 288, 13529, 15874, 15874,
+	11847, -1000, 184, 15874, -1000, 635, -1000, 192, -1000, -77,
+	181, -1000, 181, 586, 554, -1000, 532, 682, -1000, 265,
+	15874, 15874, 1017, 1005, -1000, -1000, 403, 403, 403, 403,
+	59, 501, -1000, 403, 403, 1061, -1000, 532, -1000, 770,
+	155, -1000, -1000, -1000, 633, 570, -1000, 570, 570, 165,
+	184, -1000, 596, 253, 488, -1000, 63, 15874, 334, 976,
+	-1000, 974, -1000, -1000, -1000, -1000, -1000, 44, 5784, 4049,
+	564, -1000, -1000, 9509, 9509, -1000, -1000, -1000, -1000, 501,
+	41, -183, -1000, -1000, -1000, 15874, 639, 501, 15874, -1000,
+	-1000, -1000, -1000, -1000, -1000, -1000, 363, -1000, -1000, 15874,
+	-1000, -1000, 484, -1000, -1000, 561, -1000, 15874, -1000, -1000,
+	797, 288, 628, -1000, 909, -177, -186, 618, -1000, -1000,
+	-1000, 792, -1000, -1000, 44, 933, -179, -1000, 907, -1000,
+	15874, -1000, 30, -1000, -180, 551, 18, -184, 866, 532,
+	-187, 863, -1000, 1050, 9843, -1000, -1000, 1052, 176, 176,
+	403, 501, -1000, -1000, -1000, 71, 483, -1000, -1000, -1000,
+	-1000, -1000, -1000,
 }
 var yyPgo = [...]int{
 
-	0, 1156, 57, 557, 1155, 1154, 1153, 1151, 1150, 1148,
-	1147, 1146, 1145, 1144, 1143, 1141, 1140, 1138, 1136, 1132,
-	1127, 1125, 1124, 1123, 1122, 1121, 89, 1120, 1119, 1118,
-	69, 1117, 70, 1115, 1112, 47, 114, 34, 43, 1634,
-	1111, 22, 54, 63, 1110, 28, 1108, 1107, 76, 1106,
-	1102, 52, 1101, 1098, 77, 1096, 65, 1095, 12, 35,
-	1094, 1093, 1089, 1088, 75, 419, 1087, 1086, 15, 1085,
-	1084, 99, 1083, 55, 6, 14, 13, 19, 1082, 1126,
-	9, 1080, 53, 1078, 1077, 1076, 1075, 26, 1074, 61,
-	1073, 17, 56, 1071, 40, 64, 31, 25, 5, 78,
-	73, 1070, 23, 62, 50, 1068, 1067, 476, 1066, 1065,
-	44, 1064, 1062, 1061, 30, 1060, 90, 491, 1059, 1058,
-	1038, 1034, 46, 704, 1264, 130, 66, 1032, 1030, 1029,
-	2331, 42, 51, 18, 1025, 37, 1482, 33, 1024, 1023,
-	41, 1022, 1021, 1020, 1018, 1017, 1016, 1015, 94, 1011,
-	1010, 1008, 108, 24, 1006, 1005, 60, 20, 1003, 999,
-	997, 48, 59, 985, 984, 49, 981, 980, 21, 976,
-	975, 974, 973, 970, 29, 7, 968, 16, 967, 8,
-	964, 27, 963, 3, 962, 10, 959, 2, 0, 958,
-	11, 45, 1, 957, 4, 955, 954, 1324, 1407, 79,
-	953, 80,
+	0, 1302, 63, 591, 1299, 1291, 1290, 1289, 1287, 1286,
+	1285, 1284, 1283, 1282, 1279, 1278, 1277, 1276, 1272, 1265,
+	1263, 1262, 1258, 1254, 1253, 1251, 1250, 90, 1248, 1247,
+	1237, 67, 1234, 71, 1233, 1232, 47, 261, 34, 44,
+	283, 1225, 22, 54, 66, 1223, 32, 1222, 1221, 76,
+	1220, 1219, 52, 1217, 1216, 77, 1215, 65, 1214, 13,
+	36, 1213, 1211, 1210, 1209, 70, 419, 1208, 1207, 15,
+	1206, 1205, 80, 1203, 51, 6, 14, 18, 19, 1202,
+	1037, 9, 1201, 55, 1200, 1194, 1191, 1190, 26, 1188,
+	57, 1186, 28, 56, 1185, 41, 74, 30, 25, 5,
+	1184, 1182, 23, 62, 48, 60, 1180, 1178, 463, 1176,
+	1173, 42, 1172, 1166, 1165, 24, 1164, 81, 414, 1163,
+	1162, 1159, 1158, 31, 704, 1264, 130, 61, 1157, 1156,
+	1155, 2331, 38, 50, 17, 1152, 86, 795, 43, 1151,
+	1149, 35, 1148, 1146, 1140, 1138, 1134, 1133, 1123, 382,
+	1120, 1118, 1116, 16, 53, 1115, 1114, 58, 20, 1112,
+	1111, 1109, 46, 59, 1108, 1107, 49, 1105, 1104, 21,
+	1099, 1097, 1096, 1095, 1094, 29, 7, 1090, 12, 1089,
+	8, 1088, 27, 1086, 3, 1085, 10, 1084, 2, 0,
+	1083, 11, 45, 1, 1078, 4, 1077, 1076, 1324, 1407,
+	78, 1075, 97,
 }
 var yyR1 = [...]int{
 
-	0, 195, 196, 196, 1, 1, 1, 1, 1, 1,
+	0, 196, 197, 197, 1, 1, 1, 1, 1, 1,
 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-	1, 1, 1, 1, 188, 188, 188, 2, 2, 2,
-	6, 3, 4, 4, 5, 5, 7, 7, 29, 29,
-	8, 9, 9, 9, 9, 199, 199, 48, 48, 49,
-	49, 95, 95, 10, 10, 10, 10, 100, 100, 104,
-	104, 104, 105, 105, 105, 105, 138, 138, 11, 11,
-	11, 11, 11, 11, 11, 190, 190, 189, 187, 187,
-	186, 186, 185, 17, 170, 172, 172, 171, 171, 171,
-	171, 162, 141, 141, 141, 141, 144, 144, 142, 142,
-	142, 142, 142, 142, 142, 142, 142, 143, 143, 143,
-	143, 143, 145, 145, 145, 145, 145, 146, 146, 146,
-	146, 146, 146, 146, 146, 146, 146, 146, 146, 146,
-	146, 146, 147, 147, 147, 147, 147, 147, 147, 147,
-	161, 161, 148, 148, 156, 156, 157, 157, 157, 154,
-	154, 155, 155, 158, 158, 158, 150, 150, 151, 151,
-	159, 159, 152, 152, 152, 153, 153, 153, 160, 160,
-	160, 160, 160, 149, 149, 163, 163, 180, 180, 179,
-	179, 179, 169, 169, 176, 176, 176, 176, 176, 166,
-	166, 166, 167, 167, 165, 165, 168, 168, 178, 178,
-	177, 164, 164, 181, 181, 181, 181, 193, 194, 192,
-	192, 192, 192, 192, 173, 173, 173, 174, 174, 174,
-	175, 175, 175, 12, 12, 12, 12, 12, 12, 12,
-	12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
-	191, 191, 191, 191, 191, 191, 191, 191, 191, 191,
-	191, 191, 191, 191, 184, 182, 182, 183, 183, 13,
-	18, 18, 14, 14, 14, 14, 14, 15, 15, 19,
-	20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
-	20, 20, 20, 20, 20, 20, 20, 20, 20, 20,
-	20, 20, 20, 20, 20, 20, 20, 111, 111, 113,
-	113, 109, 109, 112, 112, 110, 110, 110, 114, 114,
-	114, 115, 115, 139, 139, 139, 21, 21, 23, 23,
-	24, 25, 22, 22, 22, 22, 22, 22, 22, 16,
-	200, 26, 27, 27, 28, 28, 28, 32, 32, 32,
-	30, 30, 30, 31, 31, 37, 37, 36, 36, 38,
-	38, 38, 38, 127, 127, 127, 126, 126, 40, 40,
-	41, 41, 42, 42, 43, 43, 43, 43, 57, 57,
-	94, 94, 96, 96, 44, 44, 44, 44, 45, 45,
-	46, 46, 47, 47, 134, 134, 133, 133, 133, 132,
-	132, 50, 50, 50, 52, 51, 51, 51, 51, 53,
-	53, 55, 55, 54, 54, 56, 58, 58, 58, 58,
-	58, 59, 59, 39, 39, 39, 39, 39, 39, 39,
-	108, 108, 61, 61, 60, 60, 60, 60, 60, 60,
-	60, 60, 60, 60, 72, 72, 72, 72, 72, 72,
-	62, 62, 62, 62, 62, 62, 62, 35, 35, 73,
-	73, 73, 79, 74, 74, 65, 65, 65, 65, 65,
-	65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-	65, 65, 65, 65, 65, 65, 65, 65, 65, 65,
-	65, 65, 65, 65, 65, 65, 65, 69, 69, 69,
-	69, 67, 67, 67, 67, 67, 67, 67, 67, 67,
-	67, 67, 67, 67, 68, 68, 68, 68, 68, 68,
-	68, 68, 68, 68, 68, 68, 68, 68, 68, 68,
-	201, 201, 71, 70, 70, 70, 70, 70, 70, 70,
-	33, 33, 33, 33, 33, 137, 137, 140, 140, 140,
-	140, 140, 140, 140, 140, 140, 140, 140, 140, 140,
-	83, 83, 34, 34, 81, 81, 82, 84, 84, 80,
-	80, 80, 64, 64, 64, 64, 64, 64, 64, 64,
-	66, 66, 66, 85, 85, 86, 86, 87, 87, 88,
-	88, 89, 90, 90, 90, 91, 91, 91, 91, 92,
-	92, 92, 63, 63, 63, 63, 63, 63, 93, 93,
-	93, 93, 97, 97, 75, 75, 77, 77, 76, 78,
-	98, 98, 102, 99, 99, 103, 103, 103, 103, 101,
-	101, 101, 129, 129, 129, 106, 106, 116, 116, 117,
-	117, 107, 107, 118, 118, 118, 118, 118, 118, 118,
-	118, 118, 118, 119, 119, 119, 120, 120, 121, 121,
-	121, 128, 128, 124, 124, 125, 125, 130, 130, 131,
-	131, 122, 122, 122, 122, 122, 122, 122, 122, 122,
-	122, 122, 122, 122, 122, 122, 122, 122, 122, 122,
-	122, 122, 122, 122, 122, 122, 122, 122, 122, 122,
-	122, 122, 122, 122, 122, 122, 122, 122, 122, 122,
-	122, 122, 122, 122, 122, 122, 122, 122, 122, 122,
-	122, 122, 122, 122, 122, 122, 122, 122, 122, 122,
-	122, 122, 122, 122, 122, 122, 122, 122, 122, 122,
-	122, 122, 122, 122, 122, 122, 122, 122, 122, 122,
-	122, 122, 122, 122, 122, 122, 122, 122, 122, 122,
-	122, 122, 122, 122, 122, 122, 122, 122, 122, 122,
-	122, 122, 122, 122, 122, 122, 122, 122, 122, 122,
-	122, 122, 122, 122, 122, 122, 122, 122, 122, 123,
-	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
+	1, 1, 1, 1, 1, 189, 189, 189, 2, 2,
+	2, 6, 3, 4, 4, 5, 5, 7, 7, 30,
+	30, 8, 9, 9, 9, 9, 200, 200, 49, 49,
+	50, 50, 96, 96, 10, 11, 11, 105, 105, 104,
+	104, 104, 106, 106, 106, 106, 139, 139, 12, 12,
+	12, 12, 12, 12, 12, 191, 191, 190, 188, 188,
+	187, 187, 186, 18, 171, 173, 173, 172, 172, 172,
+	172, 163, 142, 142, 142, 142, 145, 145, 143, 143,
+	143, 143, 143, 143, 143, 143, 143, 144, 144, 144,
+	144, 144, 146, 146, 146, 146, 146, 147, 147, 147,
+	147, 147, 147, 147, 147, 147, 147, 147, 147, 147,
+	147, 147, 148, 148, 148, 148, 148, 148, 148, 148,
+	162, 162, 149, 149, 157, 157, 158, 158, 158, 155,
+	155, 156, 156, 159, 159, 159, 151, 151, 152, 152,
+	160, 160, 153, 153, 153, 154, 154, 154, 161, 161,
+	161, 161, 161, 150, 150, 164, 164, 181, 181, 180,
+	180, 180, 170, 170, 177, 177, 177, 177, 177, 167,
+	167, 167, 168, 168, 166, 166, 169, 169, 179, 179,
+	178, 165, 165, 182, 182, 182, 182, 194, 195, 193,
+	193, 193, 193, 193, 174, 174, 174, 175, 175, 175,
+	176, 176, 176, 13, 13, 13, 13, 13, 13, 13,
+	13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
+	192, 192, 192, 192, 192, 192, 192, 192, 192, 192,
+	192, 192, 192, 192, 185, 183, 183, 184, 184, 14,
+	19, 19, 15, 15, 15, 15, 15, 16, 16, 20,
+	21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+	21, 21, 21, 21, 21, 21, 21, 21, 21, 21,
+	21, 21, 21, 21, 21, 21, 21, 112, 112, 114,
+	114, 110, 110, 113, 113, 111, 111, 111, 115, 115,
+	115, 116, 116, 140, 140, 140, 22, 22, 24, 24,
+	25, 26, 23, 23, 23, 23, 23, 23, 23, 17,
+	201, 27, 28, 28, 29, 29, 29, 33, 33, 33,
+	31, 31, 31, 32, 32, 38, 38, 37, 37, 39,
+	39, 39, 39, 128, 128, 128, 127, 127, 41, 41,
+	42, 42, 43, 43, 44, 44, 44, 44, 58, 58,
+	95, 95, 97, 97, 45, 45, 45, 45, 46, 46,
+	47, 47, 48, 48, 135, 135, 134, 134, 134, 133,
+	133, 51, 51, 51, 53, 52, 52, 52, 52, 54,
+	54, 56, 56, 55, 55, 57, 59, 59, 59, 59,
+	59, 60, 60, 40, 40, 40, 40, 40, 40, 40,
+	109, 109, 62, 62, 61, 61, 61, 61, 61, 61,
+	61, 61, 61, 61, 73, 73, 73, 73, 73, 73,
+	63, 63, 63, 63, 63, 63, 63, 36, 36, 74,
+	74, 74, 80, 75, 75, 66, 66, 66, 66, 66,
+	66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
+	66, 66, 66, 66, 66, 66, 66, 66, 66, 66,
+	66, 66, 66, 66, 66, 66, 66, 70, 70, 70,
+	70, 68, 68, 68, 68, 68, 68, 68, 68, 68,
+	68, 68, 68, 68, 69, 69, 69, 69, 69, 69,
+	69, 69, 69, 69, 69, 69, 69, 69, 69, 69,
+	202, 202, 72, 71, 71, 71, 71, 71, 71, 71,
+	34, 34, 34, 34, 34, 138, 138, 141, 141, 141,
+	141, 141, 141, 141, 141, 141, 141, 141, 141, 141,
+	84, 84, 35, 35, 82, 82, 83, 85, 85, 81,
+	81, 81, 65, 65, 65, 65, 65, 65, 65, 65,
+	67, 67, 67, 86, 86, 87, 87, 88, 88, 89,
+	89, 90, 91, 91, 91, 92, 92, 92, 92, 93,
+	93, 93, 64, 64, 64, 64, 64, 64, 94, 94,
+	94, 94, 98, 98, 76, 76, 78, 78, 77, 79,
+	99, 99, 102, 100, 100, 100, 103, 103, 103, 103,
+	101, 101, 101, 130, 130, 130, 107, 107, 117, 117,
+	118, 118, 108, 108, 119, 119, 119, 119, 119, 119,
+	119, 119, 119, 119, 120, 120, 120, 121, 121, 122,
+	122, 122, 129, 129, 125, 125, 126, 126, 131, 131,
+	132, 132, 123, 123, 123, 123, 123, 123, 123, 123,
 	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
 	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
 	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
@@ -2785,21 +2775,33 @@ var yyR1 = [...]int{
 	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
 	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
 	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
-	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
-	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
-	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
-	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
-	123, 123, 123, 123, 123, 123, 123, 123, 123, 123,
-	197, 198, 135, 136, 136, 136,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+	124, 198, 199, 136, 137, 137, 137,
 }
 var yyR2 = [...]int{
 
 	0, 2, 0, 1, 1, 1, 1, 1, 1, 1,
 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-	1, 1, 1, 0, 1, 1, 1, 4, 6, 7,
-	5, 10, 1, 3, 1, 3, 7, 8, 1, 1,
-	9, 8, 7, 6, 6, 1, 1, 1, 3, 1,
-	3, 0, 4, 3, 4, 5, 4, 1, 3, 3,
+	1, 1, 1, 1, 0, 1, 1, 1, 4, 6,
+	7, 5, 10, 1, 3, 1, 3, 7, 8, 1,
+	1, 9, 8, 7, 6, 6, 1, 1, 1, 3,
+	1, 3, 0, 4, 3, 5, 4, 1, 3, 3,
 	2, 2, 2, 2, 2, 1, 1, 1, 2, 2,
 	8, 4, 6, 5, 5, 0, 2, 1, 0, 2,
 	1, 3, 3, 4, 4, 2, 4, 1, 3, 3,
@@ -2855,11 +2857,11 @@ var yyR2 = [...]int{
 	3, 2, 0, 1, 1, 0, 2, 4, 4, 0,
 	2, 4, 2, 1, 3, 5, 4, 6, 1, 3,
 	3, 5, 0, 5, 1, 3, 1, 2, 3, 1,
-	1, 3, 3, 1, 3, 3, 3, 3, 3, 1,
-	2, 1, 1, 1, 1, 1, 1, 0, 2, 0,
-	3, 0, 1, 1, 1, 1, 1, 1, 1, 1,
-	1, 1, 1, 0, 1, 1, 1, 1, 0, 1,
-	1, 0, 2, 1, 1, 1, 1, 1, 1, 1,
+	1, 3, 3, 1, 2, 3, 3, 3, 3, 3,
+	1, 2, 1, 1, 1, 1, 1, 1, 0, 2,
+	0, 3, 0, 1, 1, 1, 1, 1, 1, 1,
+	1, 1, 1, 1, 0, 1, 1, 1, 1, 0,
+	1, 1, 0, 2, 1, 1, 1, 1, 1, 1,
 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
@@ -2889,178 +2891,178 @@ var yyR2 = [...]int{
 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-	1, 1, 0, 0, 1, 1,
+	1, 1, 1, 0, 0, 1, 1,
 }
 var yyChk = [...]int{
 
-	-1000, -195, -1, -2, -6, -7, -8, -9, -10, -11,
-	-12, -13, -14, -15, -19, -20, -21, -23, -24, -25,
-	-22, -16, -3, -4, 6, 7, -29, 9, 10, 30,
-	-17, 118, 119, 121, 120, 154, 122, 147, 51, 168,
-	169, 171, 172, 25, 148, 149, 152, 153, 31, 32,
-	124, -197, 8, 254, 55, -196, 352, -87, 15, -28,
-	5, -26, -200, -26, -26, -26, -26, -26, -170, -172,
-	55, 93, -121, 128, 75, 246, 125, 126, 132, -124,
-	-188, -123, 58, 59, 60, 264, 140, 296, 297, 168,
-	179, 173, 200, 192, 265, 298, 141, 190, 193, 233,
-	138, 299, 220, 227, 69, 171, 242, 300, 150, 188,
-	184, 301, 273, 182, 27, 302, 229, 205, 303, 269,
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+	55, 54, -86, 13, -153, -189, -66, -66, -66, -66,
+	-66, -92, 62, -66, -66, 28, -78, 35, -2, -198,
+	-125, -125, -125, -92, -95, -95, -199, -95, -95, -134,
+	-181, -180, 54, 137, 69, -178, 57, 56, -161, 133,
+	28, 132, -69, -154, -154, 57, 57, -198, 56, 85,
+	-95, -55, -87, 14, 16, -199, -199, -199, -199, -34,
+	95, 267, -199, -199, -199, 9, -76, -2, 115, 57,
+	-199, -199, -199, -59, -180, -189, -170, 85, 62, 145,
+	-125, -150, 69, 28, 28, -183, -184, 156, -186, -176,
+	57, -40, -75, -199, 265, 50, 268, -99, -199, -125,
+	63, -55, 62, -199, 56, -125, -191, 40, 266, 269,
+	55, -184, 35, -188, 40, -95, 158, 267, 57, 159,
+	268, -194, -195, 53, -198, 269, -195, 53, 10, 9,
+	-66, 155, -193, 146, 141, 144, 30, -193, -199, -199,
+	140, 29, 71,
 }
 var yyDef = [...]int{
 
-	23, -2, 2, -2, 5, 6, 7, 8, 9, 10,
+	24, -2, 2, -2, 5, 6, 7, 8, 9, 10,
 	11, 12, 13, 14, 15, 16, 17, 18, 19, 20,
-	21, 22, 577, 0, 330, 330, 330, 330, 330, 330,
-	0, 648, 631, 0, 0, 0, 0, -2, 317, 318,
-	0, 320, 321, 952, 952, 952, 952, 952, 0, 0,
-	952, 0, 38, 39, 950, 1, 3, 585, 0, 0,
-	334, 337, 332, 0, 631, 631, 0, 0, 68, 69,
-	0, 0, 0, 939, 0, 629, 629, 629, 649, 650,
-	653, 654, 24, 25, 26, 779, 780, 781, 782, 783,
+	21, 22, 23, 577, 0, 330, 330, 330, 330, 330,
+	330, 0, 649, 632, 0, 0, 0, 0, -2, 317,
+	318, 0, 320, 321, 953, 953, 953, 953, 953, 0,
+	0, 953, 0, 39, 40, 951, 1, 3, 585, 0,
+	0, 334, 337, 332, 0, 632, 632, 0, 0, 68,
+	69, 0, 0, 0, 940, 0, 630, 630, 630, 650,
+	651, 654, 655, 25, 26, 27, 780, 781, 782, 783,
 	784, 785, 786, 787, 788, 789, 790, 791, 792, 793,
 	794, 795, 796, 797, 798, 799, 800, 801, 802, 803,
 	804, 805, 806, 807, 808, 809, 810, 811, 812, 813,
@@ -3076,23 +3078,23 @@ var yyDef = [...]int{
 	904, 905, 906, 907, 908, 909, 910, 911, 912, 913,
 	914, 915, 916, 917, 918, 919, 920, 921, 922, 923,
 	924, 925, 926, 927, 928, 929, 930, 931, 932, 933,
-	934, 935, 936, 937, 938, 940, 941, 942, 943, 944,
-	945, 946, 947, 948, 949, 0, 0, 0, 0, 0,
-	632, 0, 627, 0, 627, 627, 627, 0, 268, 403,
-	657, 658, 939, 0, 0, 0, 308, 0, 953, 280,
-	0, 282, 953, 0, 953, 0, 289, 0, 0, 295,
-	953, 300, 314, 315, 302, 316, 319, 322, 323, 324,
-	325, 326, 952, 952, 329, 32, 589, 0, 0, 577,
-	34, 0, 330, 335, 336, 340, 338, 339, 331, 0,
-	349, 353, 0, 413, 0, 418, 420, -2, -2, 0,
-	455, 456, 457, 458, 459, 0, 0, 0, 0, 0,
-	0, 0, 0, 483, 484, 485, 486, 562, 563, 564,
-	565, 566, 567, 568, 569, 422, 423, 559, 609, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 550, 0,
-	520, 520, 520, 520, 520, 520, 520, 520, 0, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	47, 49, 403, 53, 0, 928, 613, -2, -2, 0,
-	0, 655, 656, -2, 792, -2, 661, 662, 663, 664,
+	934, 935, 936, 937, 938, 939, 941, 942, 943, 944,
+	945, 946, 947, 948, 949, 950, 0, 0, 0, 0,
+	0, 633, 0, 628, 0, 628, 628, 628, 0, 268,
+	403, 658, 659, 940, 0, 0, 0, 308, 0, 954,
+	280, 0, 282, 954, 0, 954, 0, 289, 0, 0,
+	295, 954, 300, 314, 315, 302, 316, 319, 322, 323,
+	324, 325, 326, 953, 953, 329, 33, 589, 0, 0,
+	577, 35, 0, 330, 335, 336, 340, 338, 339, 331,
+	0, 349, 353, 0, 413, 0, 418, 420, -2, -2,
+	0, 455, 456, 457, 458, 459, 0, 0, 0, 0,
+	0, 0, 0, 0, 483, 484, 485, 486, 562, 563,
+	564, 565, 566, 567, 568, 569, 422, 423, 559, 609,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 550,
+	0, 520, 520, 520, 520, 520, 520, 520, 520, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 48, 50, 403, 54, 0, 929, 613, -2, -2,
+	0, 0, 656, 657, -2, 793, -2, 662, 663, 664,
 	665, 666, 667, 668, 669, 670, 671, 672, 673, 674,
 	675, 676, 677, 678, 679, 680, 681, 682, 683, 684,
 	685, 686, 687, 688, 689, 690, 691, 692, 693, 694,
@@ -3104,110 +3106,110 @@ var yyDef = [...]int{
 	745, 746, 747, 748, 749, 750, 751, 752, 753, 754,
 	755, 756, 757, 758, 759, 760, 761, 762, 763, 764,
 	765, 766, 767, 768, 769, 770, 771, 772, 773, 774,
-	775, 776, 777, 778, 0, 0, 87, 0, 85, 0,
-	953, 0, 0, 0, 0, 0, 0, 953, 953, 953,
-	0, 0, 0, 0, 259, 0, 0, 0, 0, 0,
-	0, 0, 267, 0, 269, 953, 308, 272, 0, 0,
-	953, 953, 953, 0, 953, 953, 279, 954, 955, 0,
-	189, 190, 191, 283, 953, 953, 285, 0, 305, 303,
-	304, 297, 298, 0, 311, 292, 293, 296, 327, 328,
-	33, 951, 27, 0, 0, 586, 0, 578, 579, 582,
-	585, 32, 337, 0, 343, 341, 342, 333, 0, 350,
-	0, 0, 0, 354, 0, 356, 357, 0, 416, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 0, 0, 0, 0, 440, 441,
-	442, 443, 444, 445, 446, 419, 0, 433, 0, 0,
-	0, 475, 476, 477, 478, 479, 480, 481, 0, 345,
-	32, 0, 453, 0, 0, 0, 0, 0, 0, 0,
-	0, 340, 0, 551, 0, 504, 512, 0, 505, 513,
-	506, 514, 507, 0, 508, 515, 509, 516, 510, 511,
-	517, 0, 0, 0, 345, 345, 0, 0, 51, 0,
-	402, 0, 360, 362, 363, 364, -2, 0, 386, -2,
-	0, 0, 0, 45, 46, 0, 0, 0, 0, 54,
-	928, 56, 57, 0, 0, 0, 165, 622, 623, 624,
-	620, 214, 0, 0, 153, 149, 93, 94, 95, 142,
-	97, 142, 142, 142, 142, 162, 162, 162, 162, 125,
-	126, 127, 128, 129, 0, 0, 112, 142, 142, 142,
-	116, 132, 133, 134, 135, 136, 137, 138, 139, 98,
-	99, 100, 101, 102, 103, 104, 105, 106, 144, 144,
-	144, 146, 146, 651, 71, 0, 953, 0, 953, 83,
-	0, 228, 230, 231, 0, 0, 0, 0, 0, 0,
-	0, 0, 262, 628, 0, 953, 265, 266, 404, 659,
-	660, 270, 271, 309, 310, 273, 274, 275, 276, 277,
-	278, 0, 192, 193, 284, 288, 0, 308, 0, 0,
-	290, 291, 0, 0, 590, 0, 0, 0, 0, 0,
-	581, 583, 584, 589, 35, 340, 0, 570, 0, 0,
-	0, 344, 30, 414, 415, 417, 434, 0, 436, 438,
-	355, 351, 0, 560, -2, 424, 425, 449, 450, 451,
-	0, 0, 0, 0, 447, 429, 0, 460, 461, 462,
-	463, 464, 465, 466, 467, 468, 469, 470, 471, 474,
-	535, 536, 0, 472, 473, 482, 0, 0, 0, 346,
-	347, 452, 0, 608, 32, 0, 0, 0, 0, 457,
-	562, 0, 457, 562, 0, 0, 0, 557, 554, 0,
-	0, 559, 0, 521, 0, 0, 0, 0, 0, 0,
-	0, 0, 0, 0, 401, 0, 0, 0, 0, 0,
-	0, 391, 0, 0, 394, 0, 0, 0, 0, 385,
-	0, 0, 406, 873, 387, 0, 389, 390, 411, 0,
-	411, 48, 411, 50, 0, 405, 614, 55, 0, 0,
-	60, 61, 615, 616, 617, 618, 0, 84, 215, 217,
-	220, 221, 222, 88, 89, 90, 0, 0, 202, 0,
-	0, 196, 196, 0, 194, 195, 86, 156, 154, 0,
-	151, 150, 96, 0, 162, 162, 119, 120, 165, 0,
-	165, 165, 165, 0, 0, 113, 114, 115, 107, 0,
-	108, 109, 110, 0, 111, 0, 0, 953, 73, 630,
-	74, 952, 0, 0, 643, 229, 633, 634, 635, 636,
-	637, 638, 639, 640, 641, 642, 0, 75, 233, 235,
-	234, 238, 0, 0, 0, 260, 953, 264, 305, 305,
-	287, 306, 307, 312, 294, 0, 587, 588, 0, 580,
-	28, 0, 625, 626, 571, 572, 358, 435, 437, 439,
-	0, 345, 426, 447, 430, 0, 427, 0, 0, 421,
-	487, 0, 0, 0, 454, -2, 491, 492, 0, 0,
-	0, 0, 0, 528, 0, 0, 529, 0, 577, 0,
-	555, 0, 0, 503, 0, 522, 0, 0, 523, 524,
-	525, 526, 527, 602, 0, 0, -2, 0, 0, 411,
-	610, 0, 361, 380, 382, 0, 377, 392, 393, 395,
-	0, 397, 0, 399, 400, 365, 367, 368, 0, 0,
-	0, 0, 388, 577, 0, 411, 43, 44, 0, 58,
-	59, 0, 0, 65, 166, 167, 0, 218, 0, 0,
-	0, 184, 196, 196, 187, 197, 188, 0, 158, 0,
-	155, 92, 152, 0, 165, 165, 121, 0, 122, 123,
-	124, 0, 140, 0, 0, 0, 0, 652, 72, 223,
-	952, 240, 241, 242, 243, 244, 245, 246, 247, 248,
-	249, 250, 251, 252, 253, 952, 0, 952, 644, 645,
-	646, 647, 0, 78, 0, 0, 0, 0, 0, 263,
-	308, 308, 591, 0, 29, 411, 0, 352, 561, 0,
-	428, 0, 448, 431, 488, 489, 348, 0, 142, 142,
-	540, 142, 146, 543, 142, 545, 142, 548, 0, 0,
-	0, 0, 0, 0, 0, 552, 502, 558, 0, 560,
-	0, 0, 36, 0, 602, 592, 604, 606, 0, 32,
-	0, 598, 0, 372, 577, 0, 0, 374, 381, 0,
-	0, 375, 0, 376, 396, 398, 0, 0, 0, 0,
-	585, 412, 42, 62, 63, 64, 216, 219, 0, 198,
-	142, 201, 185, 186, 0, 160, 0, 157, 143, 117,
-	118, 163, 164, 162, 0, 162, 0, 147, 0, 953,
-	224, 225, 226, 227, 0, 232, 0, 76, 77, 0,
-	0, 237, 261, 281, 286, 573, 359, 490, 432, 493,
-	537, 162, 541, 542, 544, 546, 547, 549, 495, 494,
-	0, 0, 0, 0, 0, 585, 0, 556, 0, 0,
-	0, 37, 0, 607, -2, 0, 0, 0, 52, 0,
-	585, 611, 612, 378, 0, 383, 0, 0, 0, 386,
-	41, 176, 0, 200, 0, 370, 168, 161, 0, 165,
-	141, 165, 0, 0, 70, 0, 79, 80, 0, 0,
-	0, 575, 0, 538, 539, 0, 0, 0, 0, 530,
-	0, 553, 0, 0, 0, 605, 0, -2, 0, 600,
-	599, 373, 40, 0, 0, 408, 0, 0, 406, 175,
-	177, 0, 182, 0, 199, 0, 0, 173, 0, 170,
-	172, 159, 130, 131, 145, 148, 0, 0, 0, 0,
-	239, 31, 0, 0, 496, 498, 497, 499, 0, 0,
-	0, 501, 518, 519, 0, 595, 32, 0, 379, 407,
-	409, 410, 369, 178, 179, 0, 183, 181, 0, 371,
-	91, 0, 169, 171, 0, 255, 0, 81, 82, 75,
-	576, 574, 500, 0, 0, 0, 603, -2, 601, 180,
-	0, 174, 254, 0, 0, 78, 531, 0, 534, 0,
-	256, 0, 236, 532, 0, 0, 0, 203, 0, 0,
-	204, 205, 0, 0, 533, 206, 0, 0, 0, 0,
-	0, 207, 209, 210, 0, 0, 208, 257, 258, 211,
-	212, 213,
+	775, 776, 777, 778, 779, 0, 0, 87, 0, 85,
+	0, 954, 0, 0, 0, 0, 0, 0, 954, 954,
+	954, 0, 0, 0, 0, 259, 0, 0, 0, 0,
+	0, 0, 0, 267, 0, 269, 954, 308, 272, 0,
+	0, 954, 954, 954, 0, 954, 954, 279, 955, 956,
+	0, 189, 190, 191, 283, 954, 954, 285, 0, 305,
+	303, 304, 297, 298, 0, 311, 292, 293, 296, 327,
+	328, 34, 952, 28, 0, 0, 586, 0, 578, 579,
+	582, 585, 33, 337, 0, 343, 341, 342, 333, 0,
+	350, 0, 0, 0, 354, 0, 356, 357, 0, 416,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 440,
+	441, 442, 443, 444, 445, 446, 419, 0, 433, 0,
+	0, 0, 475, 476, 477, 478, 479, 480, 481, 0,
+	345, 33, 0, 453, 0, 0, 0, 0, 0, 0,
+	0, 0, 340, 0, 551, 0, 504, 512, 0, 505,
+	513, 506, 514, 507, 0, 508, 515, 509, 516, 510,
+	511, 517, 0, 0, 0, 345, 345, 0, 0, 52,
+	0, 402, 0, 360, 362, 363, 364, -2, 0, 386,
+	-2, 0, 0, 0, 46, 47, 0, 0, 0, 0,
+	929, 614, 56, 57, 0, 0, 0, 165, 623, 624,
+	625, 621, 214, 0, 0, 153, 149, 93, 94, 95,
+	142, 97, 142, 142, 142, 142, 162, 162, 162, 162,
+	125, 126, 127, 128, 129, 0, 0, 112, 142, 142,
+	142, 116, 132, 133, 134, 135, 136, 137, 138, 139,
+	98, 99, 100, 101, 102, 103, 104, 105, 106, 144,
+	144, 144, 146, 146, 652, 71, 0, 954, 0, 954,
+	83, 0, 228, 230, 231, 0, 0, 0, 0, 0,
+	0, 0, 0, 262, 629, 0, 954, 265, 266, 404,
+	660, 661, 270, 271, 309, 310, 273, 274, 275, 276,
+	277, 278, 0, 192, 193, 284, 288, 0, 308, 0,
+	0, 290, 291, 0, 0, 590, 0, 0, 0, 0,
+	0, 581, 583, 584, 589, 36, 340, 0, 570, 0,
+	0, 0, 344, 31, 414, 415, 417, 434, 0, 436,
+	438, 355, 351, 0, 560, -2, 424, 425, 449, 450,
+	451, 0, 0, 0, 0, 447, 429, 0, 460, 461,
+	462, 463, 464, 465, 466, 467, 468, 469, 470, 471,
+	474, 535, 536, 0, 472, 473, 482, 0, 0, 0,
+	346, 347, 452, 0, 608, 33, 0, 0, 0, 0,
+	457, 562, 0, 457, 562, 0, 0, 0, 557, 554,
+	0, 0, 559, 0, 521, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 401, 0, 0, 0, 0,
+	0, 0, 391, 0, 0, 394, 0, 0, 0, 0,
+	385, 0, 0, 406, 874, 387, 0, 389, 390, 411,
+	0, 411, 49, 411, 51, 0, 405, 615, 55, 0,
+	0, 60, 61, 616, 617, 618, 619, 0, 84, 215,
+	217, 220, 221, 222, 88, 89, 90, 0, 0, 202,
+	0, 0, 196, 196, 0, 194, 195, 86, 156, 154,
+	0, 151, 150, 96, 0, 162, 162, 119, 120, 165,
+	0, 165, 165, 165, 0, 0, 113, 114, 115, 107,
+	0, 108, 109, 110, 0, 111, 0, 0, 954, 73,
+	631, 74, 953, 0, 0, 644, 229, 634, 635, 636,
+	637, 638, 639, 640, 641, 642, 643, 0, 75, 233,
+	235, 234, 238, 0, 0, 0, 260, 954, 264, 305,
+	305, 287, 306, 307, 312, 294, 0, 587, 588, 0,
+	580, 29, 0, 626, 627, 571, 572, 358, 435, 437,
+	439, 0, 345, 426, 447, 430, 0, 427, 0, 0,
+	421, 487, 0, 0, 0, 454, -2, 491, 492, 0,
+	0, 0, 0, 0, 528, 0, 0, 529, 0, 577,
+	0, 555, 0, 0, 503, 0, 522, 0, 0, 523,
+	524, 525, 526, 527, 602, 0, 0, -2, 0, 0,
+	411, 610, 0, 361, 380, 382, 0, 377, 392, 393,
+	395, 0, 397, 0, 399, 400, 365, 367, 368, 0,
+	0, 0, 0, 388, 577, 0, 411, 44, 45, 0,
+	58, 59, 0, 0, 65, 166, 167, 0, 218, 0,
+	0, 0, 184, 196, 196, 187, 197, 188, 0, 158,
+	0, 155, 92, 152, 0, 165, 165, 121, 0, 122,
+	123, 124, 0, 140, 0, 0, 0, 0, 653, 72,
+	223, 953, 240, 241, 242, 243, 244, 245, 246, 247,
+	248, 249, 250, 251, 252, 253, 953, 0, 953, 645,
+	646, 647, 648, 0, 78, 0, 0, 0, 0, 0,
+	263, 308, 308, 591, 0, 30, 411, 0, 352, 561,
+	0, 428, 0, 448, 431, 488, 489, 348, 0, 142,
+	142, 540, 142, 146, 543, 142, 545, 142, 548, 0,
+	0, 0, 0, 0, 0, 0, 552, 502, 558, 0,
+	560, 0, 0, 37, 0, 602, 592, 604, 606, 0,
+	33, 0, 598, 0, 372, 577, 0, 0, 374, 381,
+	0, 0, 375, 0, 376, 396, 398, 0, 0, 0,
+	0, 585, 412, 43, 62, 63, 64, 216, 219, 0,
+	198, 142, 201, 185, 186, 0, 160, 0, 157, 143,
+	117, 118, 163, 164, 162, 0, 162, 0, 147, 0,
+	954, 224, 225, 226, 227, 0, 232, 0, 76, 77,
+	0, 0, 237, 261, 281, 286, 573, 359, 490, 432,
+	493, 537, 162, 541, 542, 544, 546, 547, 549, 495,
+	494, 0, 0, 0, 0, 0, 585, 0, 556, 0,
+	0, 0, 38, 0, 607, -2, 0, 0, 0, 53,
+	0, 585, 611, 612, 378, 0, 383, 0, 0, 0,
+	386, 42, 176, 0, 200, 0, 370, 168, 161, 0,
+	165, 141, 165, 0, 0, 70, 0, 79, 80, 0,
+	0, 0, 575, 0, 538, 539, 0, 0, 0, 0,
+	530, 0, 553, 0, 0, 0, 605, 0, -2, 0,
+	600, 599, 373, 41, 0, 0, 408, 0, 0, 406,
+	175, 177, 0, 182, 0, 199, 0, 0, 173, 0,
+	170, 172, 159, 130, 131, 145, 148, 0, 0, 0,
+	0, 239, 32, 0, 0, 496, 498, 497, 499, 0,
+	0, 0, 501, 518, 519, 0, 595, 33, 0, 379,
+	407, 409, 410, 369, 178, 179, 0, 183, 181, 0,
+	371, 91, 0, 169, 171, 0, 255, 0, 81, 82,
+	75, 576, 574, 500, 0, 0, 0, 603, -2, 601,
+	180, 0, 174, 254, 0, 0, 78, 531, 0, 534,
+	0, 256, 0, 236, 532, 0, 0, 0, 203, 0,
+	0, 204, 205, 0, 0, 533, 206, 0, 0, 0,
+	0, 0, 207, 209, 210, 0, 0, 208, 257, 258,
+	211, 212, 213,
 }
 var yyTok1 = [...]int{
 
@@ -3612,53 +3614,53 @@ yydefault:
 
 	case 1:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:325
+//line sql.y:329
 		{
 			setParseTree(yylex, yyDollar[1].statement)
 		}
 	case 2:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:330
+//line sql.y:334
 		{
 		}
 	case 3:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:331
+//line sql.y:335
 		{
 		}
 	case 4:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:335
+//line sql.y:339
 		{
 			yyVAL.statement = yyDollar[1].selStmt
 		}
-	case 23:
+	case 24:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:357
+//line sql.y:362
 		{
 			setParseTree(yylex, nil)
 		}
-	case 24:
+	case 25:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:363
+//line sql.y:368
 		{
 			yyVAL.colIdent = NewColIdentWithAt(string(yyDollar[1].bytes), NoAt)
 		}
-	case 25:
+	case 26:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:367
+//line sql.y:372
 		{
 			yyVAL.colIdent = NewColIdentWithAt(string(yyDollar[1].bytes), SingleAt)
 		}
-	case 26:
+	case 27:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:371
+//line sql.y:376
 		{
 			yyVAL.colIdent = NewColIdentWithAt(string(yyDollar[1].bytes), DoubleAt)
 		}
-	case 27:
+	case 28:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:377
+//line sql.y:382
 		{
 			sel := yyDollar[1].selStmt.(*Select)
 			sel.OrderBy = yyDollar[2].orderBy
@@ -3666,57 +3668,57 @@ yydefault:
 			sel.Lock = yyDollar[4].str
 			yyVAL.selStmt = sel
 		}
-	case 28:
+	case 29:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:385
+//line sql.y:390
 		{
 			yyVAL.selStmt = &Union{Type: yyDollar[2].str, Left: yyDollar[1].selStmt, Right: yyDollar[3].selStmt, OrderBy: yyDollar[4].orderBy, Limit: yyDollar[5].limit, Lock: yyDollar[6].str}
 		}
-	case 29:
+	case 30:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:389
+//line sql.y:394
 		{
 			yyVAL.selStmt = &Select{Comments: Comments(yyDollar[2].bytes2), Cache: yyDollar[3].str, SelectExprs: SelectExprs{Nextval{Expr: yyDollar[5].expr}}, From: TableExprs{&AliasedTableExpr{Expr: yyDollar[7].tableName}}}
 		}
-	case 30:
+	case 31:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:395
+//line sql.y:400
 		{
 			yyVAL.statement = &Stream{Comments: Comments(yyDollar[2].bytes2), SelectExpr: yyDollar[3].selectExpr, Table: yyDollar[5].tableName}
 		}
-	case 31:
+	case 32:
 		yyDollar = yyS[yypt-10 : yypt+1]
-//line sql.y:402
+//line sql.y:407
 		{
 			yyVAL.selStmt = &Select{Comments: Comments(yyDollar[2].bytes2), Cache: yyDollar[3].str, Distinct: yyDollar[4].str, Hints: yyDollar[5].str, SelectExprs: yyDollar[6].selectExprs, From: yyDollar[7].tableExprs, Where: NewWhere(WhereStr, yyDollar[8].expr), GroupBy: GroupBy(yyDollar[9].exprs), Having: NewWhere(HavingStr, yyDollar[10].expr)}
 		}
-	case 32:
+	case 33:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:408
+//line sql.y:413
 		{
 			yyVAL.selStmt = yyDollar[1].selStmt
 		}
-	case 33:
+	case 34:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:412
+//line sql.y:417
 		{
 			yyVAL.selStmt = &ParenSelect{Select: yyDollar[2].selStmt}
 		}
-	case 34:
+	case 35:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:418
+//line sql.y:423
 		{
 			yyVAL.selStmt = yyDollar[1].selStmt
 		}
-	case 35:
+	case 36:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:422
+//line sql.y:427
 		{
 			yyVAL.selStmt = &ParenSelect{Select: yyDollar[2].selStmt}
 		}
-	case 36:
+	case 37:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:429
+//line sql.y:434
 		{
 			// insert_data returns a *Insert pre-filled with Columns & Values
 			ins := yyDollar[6].ins
@@ -3728,9 +3730,9 @@ yydefault:
 			ins.OnDup = OnDup(yyDollar[7].updateExprs)
 			yyVAL.statement = ins
 		}
-	case 37:
+	case 38:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:441
+//line sql.y:446
 		{
 			cols := make(Columns, 0, len(yyDollar[7].updateExprs))
 			vals := make(ValTuple, 0, len(yyDollar[8].updateExprs))
@@ -3740,194 +3742,188 @@ yydefault:
 			}
 			yyVAL.statement = &Insert{Action: yyDollar[1].str, Comments: Comments(yyDollar[2].bytes2), Ignore: yyDollar[3].str, Table: yyDollar[4].tableName, Partitions: yyDollar[5].partitions, Columns: cols, Rows: Values{vals}, OnDup: OnDup(yyDollar[8].updateExprs)}
 		}
-	case 38:
+	case 39:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:453
+//line sql.y:458
 		{
 			yyVAL.str = InsertStr
 		}
-	case 39:
+	case 40:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:457
+//line sql.y:462
 		{
 			yyVAL.str = ReplaceStr
 		}
-	case 40:
+	case 41:
 		yyDollar = yyS[yypt-9 : yypt+1]
-//line sql.y:463
+//line sql.y:468
 		{
 			yyVAL.statement = &Update{Comments: Comments(yyDollar[2].bytes2), Ignore: yyDollar[3].str, TableExprs: yyDollar[4].tableExprs, Exprs: yyDollar[6].updateExprs, Where: NewWhere(WhereStr, yyDollar[7].expr), OrderBy: yyDollar[8].orderBy, Limit: yyDollar[9].limit}
 		}
-	case 41:
+	case 42:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:469
+//line sql.y:474
 		{
 			yyVAL.statement = &Delete{Comments: Comments(yyDollar[2].bytes2), TableExprs: TableExprs{&AliasedTableExpr{Expr: yyDollar[4].tableName}}, Partitions: yyDollar[5].partitions, Where: NewWhere(WhereStr, yyDollar[6].expr), OrderBy: yyDollar[7].orderBy, Limit: yyDollar[8].limit}
 		}
-	case 42:
+	case 43:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:473
+//line sql.y:478
 		{
 			yyVAL.statement = &Delete{Comments: Comments(yyDollar[2].bytes2), Targets: yyDollar[4].tableNames, TableExprs: yyDollar[6].tableExprs, Where: NewWhere(WhereStr, yyDollar[7].expr)}
 		}
-	case 43:
-		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:477
-		{
-			yyVAL.statement = &Delete{Comments: Comments(yyDollar[2].bytes2), Targets: yyDollar[3].tableNames, TableExprs: yyDollar[5].tableExprs, Where: NewWhere(WhereStr, yyDollar[6].expr)}
-		}
 	case 44:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:481
+//line sql.y:482
 		{
 			yyVAL.statement = &Delete{Comments: Comments(yyDollar[2].bytes2), Targets: yyDollar[3].tableNames, TableExprs: yyDollar[5].tableExprs, Where: NewWhere(WhereStr, yyDollar[6].expr)}
 		}
 	case 45:
-		yyDollar = yyS[yypt-1 : yypt+1]
+		yyDollar = yyS[yypt-6 : yypt+1]
 //line sql.y:486
 		{
+			yyVAL.statement = &Delete{Comments: Comments(yyDollar[2].bytes2), Targets: yyDollar[3].tableNames, TableExprs: yyDollar[5].tableExprs, Where: NewWhere(WhereStr, yyDollar[6].expr)}
 		}
 	case 46:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:487
+//line sql.y:491
 		{
 		}
 	case 47:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:491
+//line sql.y:492
 		{
-			yyVAL.tableNames = TableNames{yyDollar[1].tableName}
 		}
 	case 48:
+		yyDollar = yyS[yypt-1 : yypt+1]
+//line sql.y:496
+		{
+			yyVAL.tableNames = TableNames{yyDollar[1].tableName}
+		}
+	case 49:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:495
+//line sql.y:500
 		{
 			yyVAL.tableNames = append(yyVAL.tableNames, yyDollar[3].tableName)
 		}
-	case 49:
+	case 50:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:501
+//line sql.y:506
 		{
 			yyVAL.tableNames = TableNames{yyDollar[1].tableName}
 		}
-	case 50:
+	case 51:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:505
+//line sql.y:510
 		{
 			yyVAL.tableNames = append(yyVAL.tableNames, yyDollar[3].tableName)
 		}
-	case 51:
+	case 52:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:510
+//line sql.y:515
 		{
 			yyVAL.partitions = nil
 		}
-	case 52:
+	case 53:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:514
+//line sql.y:519
 		{
 			yyVAL.partitions = yyDollar[3].partitions
 		}
-	case 53:
+	case 54:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:520
+//line sql.y:525
 		{
 			yyVAL.statement = &Set{Comments: Comments(yyDollar[2].bytes2), Exprs: yyDollar[3].setExprs}
 		}
-	case 54:
-		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:524
-		{
-			yyVAL.statement = &Set{Comments: Comments(yyDollar[2].bytes2), Scope: yyDollar[3].str, Exprs: yyDollar[4].setExprs}
-		}
 	case 55:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:528
+//line sql.y:531
 		{
-			yyVAL.statement = &Set{Comments: Comments(yyDollar[2].bytes2), Scope: yyDollar[3].str, Exprs: yyDollar[5].setExprs}
+			yyVAL.statement = &SetTransaction{Comments: Comments(yyDollar[2].bytes2), Scope: yyDollar[3].str, Characteristics: yyDollar[5].characteristics}
 		}
 	case 56:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:532
+//line sql.y:535
 		{
-			yyVAL.statement = &Set{Comments: Comments(yyDollar[2].bytes2), Exprs: yyDollar[4].setExprs}
+			yyVAL.statement = &SetTransaction{Comments: Comments(yyDollar[2].bytes2), Characteristics: yyDollar[4].characteristics}
 		}
 	case 57:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:538
+//line sql.y:541
 		{
-			yyVAL.setExprs = SetExprs{yyDollar[1].setExpr}
+			yyVAL.characteristics = []Characteristic{yyDollar[1].characteristic}
 		}
 	case 58:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:542
+//line sql.y:545
 		{
-			yyVAL.setExprs = append(yyVAL.setExprs, yyDollar[3].setExpr)
+			yyVAL.characteristics = append(yyVAL.characteristics, yyDollar[3].characteristic)
 		}
 	case 59:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:548
+//line sql.y:551
 		{
-			yyVAL.setExpr = &SetExpr{Name: NewColIdent(TransactionStr), Expr: NewStrVal([]byte(yyDollar[3].str))}
+			yyVAL.characteristic = &IsolationLevel{Level: string(yyDollar[3].str)}
 		}
 	case 60:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:552
+//line sql.y:555
 		{
-			yyVAL.setExpr = &SetExpr{Name: NewColIdent(TransactionStr), Expr: NewStrVal([]byte(TxReadWrite))}
+			yyVAL.characteristic = &AccessMode{Mode: TxReadWrite}
 		}
 	case 61:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:556
+//line sql.y:559
 		{
-			yyVAL.setExpr = &SetExpr{Name: NewColIdent(TransactionStr), Expr: NewStrVal([]byte(TxReadOnly))}
+			yyVAL.characteristic = &AccessMode{Mode: TxReadOnly}
 		}
 	case 62:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:562
+//line sql.y:565
 		{
-			yyVAL.str = IsolationLevelRepeatableRead
+			yyVAL.str = RepeatableRead
 		}
 	case 63:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:566
+//line sql.y:569
 		{
-			yyVAL.str = IsolationLevelReadCommitted
+			yyVAL.str = ReadCommitted
 		}
 	case 64:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:570
+//line sql.y:573
 		{
-			yyVAL.str = IsolationLevelReadUncommitted
+			yyVAL.str = ReadUncommitted
 		}
 	case 65:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:574
+//line sql.y:577
 		{
-			yyVAL.str = IsolationLevelSerializable
+			yyVAL.str = Serializable
 		}
 	case 66:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:580
+//line sql.y:583
 		{
 			yyVAL.str = SessionStr
 		}
 	case 67:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:584
+//line sql.y:587
 		{
 			yyVAL.str = GlobalStr
 		}
 	case 68:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:590
+//line sql.y:593
 		{
 			yyDollar[1].ddl.TableSpec = yyDollar[2].TableSpec
 			yyVAL.statement = yyDollar[1].ddl
 		}
 	case 69:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:595
+//line sql.y:598
 		{
 			// Create table [name] like [name]
 			yyDollar[1].ddl.OptLike = yyDollar[2].optLike
@@ -3935,139 +3931,139 @@ yydefault:
 		}
 	case 70:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:601
+//line sql.y:604
 		{
 			// Change this to an alter statement
 			yyVAL.statement = &DDL{Action: AlterStr, Table: yyDollar[7].tableName}
 		}
 	case 71:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:606
+//line sql.y:609
 		{
 			yyVAL.statement = &DDL{Action: CreateStr, Table: yyDollar[3].tableName.ToViewName()}
 		}
 	case 72:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:610
+//line sql.y:613
 		{
 			yyVAL.statement = &DDL{Action: CreateStr, Table: yyDollar[5].tableName.ToViewName()}
 		}
 	case 73:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:614
+//line sql.y:617
 		{
 			yyVAL.statement = &DBDDL{Action: CreateStr, DBName: string(yyDollar[4].colIdent.String())}
 		}
 	case 74:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:618
+//line sql.y:621
 		{
 			yyVAL.statement = &DBDDL{Action: CreateStr, DBName: string(yyDollar[4].colIdent.String())}
 		}
 	case 75:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:623
+//line sql.y:626
 		{
 			yyVAL.colIdent = NewColIdent("")
 		}
 	case 76:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:627
+//line sql.y:630
 		{
 			yyVAL.colIdent = yyDollar[2].colIdent
 		}
 	case 77:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:633
+//line sql.y:636
 		{
 			yyVAL.colIdent = yyDollar[1].colIdent
 		}
 	case 78:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:638
+//line sql.y:641
 		{
 			var v []VindexParam
 			yyVAL.vindexParams = v
 		}
 	case 79:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:643
+//line sql.y:646
 		{
 			yyVAL.vindexParams = yyDollar[2].vindexParams
 		}
 	case 80:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:649
+//line sql.y:652
 		{
 			yyVAL.vindexParams = make([]VindexParam, 0, 4)
 			yyVAL.vindexParams = append(yyVAL.vindexParams, yyDollar[1].vindexParam)
 		}
 	case 81:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:654
+//line sql.y:657
 		{
 			yyVAL.vindexParams = append(yyVAL.vindexParams, yyDollar[3].vindexParam)
 		}
 	case 82:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:660
+//line sql.y:663
 		{
 			yyVAL.vindexParam = VindexParam{Key: yyDollar[1].colIdent, Val: yyDollar[3].str}
 		}
 	case 83:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:666
+//line sql.y:669
 		{
 			yyVAL.ddl = &DDL{Action: CreateStr, Table: yyDollar[4].tableName}
 			setDDL(yylex, yyVAL.ddl)
 		}
 	case 84:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:673
+//line sql.y:676
 		{
 			yyVAL.TableSpec = yyDollar[2].TableSpec
 			yyVAL.TableSpec.Options = yyDollar[4].str
 		}
 	case 85:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:680
+//line sql.y:683
 		{
 			yyVAL.optLike = &OptLike{LikeTable: yyDollar[2].tableName}
 		}
 	case 86:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:684
+//line sql.y:687
 		{
 			yyVAL.optLike = &OptLike{LikeTable: yyDollar[3].tableName}
 		}
 	case 87:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:690
+//line sql.y:693
 		{
 			yyVAL.TableSpec = &TableSpec{}
 			yyVAL.TableSpec.AddColumn(yyDollar[1].columnDefinition)
 		}
 	case 88:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:695
+//line sql.y:698
 		{
 			yyVAL.TableSpec.AddColumn(yyDollar[3].columnDefinition)
 		}
 	case 89:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:699
+//line sql.y:702
 		{
 			yyVAL.TableSpec.AddIndex(yyDollar[3].indexDefinition)
 		}
 	case 90:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:703
+//line sql.y:706
 		{
 			yyVAL.TableSpec.AddConstraint(yyDollar[3].constraintDefinition)
 		}
 	case 91:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:709
+//line sql.y:712
 		{
 			yyDollar[2].columnType.NotNull = yyDollar[3].boolVal
 			yyDollar[2].columnType.Default = yyDollar[4].optVal
@@ -4079,7 +4075,7 @@ yydefault:
 		}
 	case 92:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:720
+//line sql.y:723
 		{
 			yyVAL.columnType = yyDollar[1].columnType
 			yyVAL.columnType.Unsigned = yyDollar[2].boolVal
@@ -4087,74 +4083,74 @@ yydefault:
 		}
 	case 96:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:731
+//line sql.y:734
 		{
 			yyVAL.columnType = yyDollar[1].columnType
 			yyVAL.columnType.Length = yyDollar[2].sqlVal
 		}
 	case 97:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:736
+//line sql.y:739
 		{
 			yyVAL.columnType = yyDollar[1].columnType
 		}
 	case 98:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:742
+//line sql.y:745
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 99:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:746
+//line sql.y:749
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 100:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:750
+//line sql.y:753
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 101:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:754
+//line sql.y:757
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 102:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:758
+//line sql.y:761
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 103:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:762
+//line sql.y:765
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 104:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:766
+//line sql.y:769
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 105:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:770
+//line sql.y:773
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 106:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:774
+//line sql.y:777
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 107:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:780
+//line sql.y:783
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 			yyVAL.columnType.Length = yyDollar[2].LengthScaleOption.Length
@@ -4162,7 +4158,7 @@ yydefault:
 		}
 	case 108:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:786
+//line sql.y:789
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 			yyVAL.columnType.Length = yyDollar[2].LengthScaleOption.Length
@@ -4170,7 +4166,7 @@ yydefault:
 		}
 	case 109:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:792
+//line sql.y:795
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 			yyVAL.columnType.Length = yyDollar[2].LengthScaleOption.Length
@@ -4178,7 +4174,7 @@ yydefault:
 		}
 	case 110:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:798
+//line sql.y:801
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 			yyVAL.columnType.Length = yyDollar[2].LengthScaleOption.Length
@@ -4186,7 +4182,7 @@ yydefault:
 		}
 	case 111:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:804
+//line sql.y:807
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 			yyVAL.columnType.Length = yyDollar[2].LengthScaleOption.Length
@@ -4194,206 +4190,206 @@ yydefault:
 		}
 	case 112:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:812
+//line sql.y:815
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 113:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:816
+//line sql.y:819
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal}
 		}
 	case 114:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:820
+//line sql.y:823
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal}
 		}
 	case 115:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:824
+//line sql.y:827
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal}
 		}
 	case 116:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:828
+//line sql.y:831
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 117:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:834
+//line sql.y:837
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal, Charset: yyDollar[3].str, Collate: yyDollar[4].str}
 		}
 	case 118:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:838
+//line sql.y:841
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal, Charset: yyDollar[3].str, Collate: yyDollar[4].str}
 		}
 	case 119:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:842
+//line sql.y:845
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal}
 		}
 	case 120:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:846
+//line sql.y:849
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal}
 		}
 	case 121:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:850
+//line sql.y:853
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), Charset: yyDollar[2].str, Collate: yyDollar[3].str}
 		}
 	case 122:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:854
+//line sql.y:857
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), Charset: yyDollar[2].str, Collate: yyDollar[3].str}
 		}
 	case 123:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:858
+//line sql.y:861
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), Charset: yyDollar[2].str, Collate: yyDollar[3].str}
 		}
 	case 124:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:862
+//line sql.y:865
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), Charset: yyDollar[2].str, Collate: yyDollar[3].str}
 		}
 	case 125:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:866
+//line sql.y:869
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 126:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:870
+//line sql.y:873
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 127:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:874
+//line sql.y:877
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 128:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:878
+//line sql.y:881
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 129:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:882
+//line sql.y:885
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 130:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:886
+//line sql.y:889
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), EnumValues: yyDollar[3].strs, Charset: yyDollar[5].str, Collate: yyDollar[6].str}
 		}
 	case 131:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:891
+//line sql.y:894
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes), EnumValues: yyDollar[3].strs, Charset: yyDollar[5].str, Collate: yyDollar[6].str}
 		}
 	case 132:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:897
+//line sql.y:900
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 133:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:901
+//line sql.y:904
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 134:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:905
+//line sql.y:908
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 135:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:909
+//line sql.y:912
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 136:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:913
+//line sql.y:916
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 137:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:917
+//line sql.y:920
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 138:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:921
+//line sql.y:924
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 139:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:925
+//line sql.y:928
 		{
 			yyVAL.columnType = ColumnType{Type: string(yyDollar[1].bytes)}
 		}
 	case 140:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:931
+//line sql.y:934
 		{
 			yyVAL.strs = make([]string, 0, 4)
 			yyVAL.strs = append(yyVAL.strs, "'"+string(yyDollar[1].bytes)+"'")
 		}
 	case 141:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:936
+//line sql.y:939
 		{
 			yyVAL.strs = append(yyDollar[1].strs, "'"+string(yyDollar[3].bytes)+"'")
 		}
 	case 142:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:941
+//line sql.y:944
 		{
 			yyVAL.sqlVal = nil
 		}
 	case 143:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:945
+//line sql.y:948
 		{
 			yyVAL.sqlVal = NewIntVal(yyDollar[2].bytes)
 		}
 	case 144:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:950
+//line sql.y:953
 		{
 			yyVAL.LengthScaleOption = LengthScaleOption{}
 		}
 	case 145:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:954
+//line sql.y:957
 		{
 			yyVAL.LengthScaleOption = LengthScaleOption{
 				Length: NewIntVal(yyDollar[2].bytes),
@@ -4402,13 +4398,13 @@ yydefault:
 		}
 	case 146:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:962
+//line sql.y:965
 		{
 			yyVAL.LengthScaleOption = LengthScaleOption{}
 		}
 	case 147:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:966
+//line sql.y:969
 		{
 			yyVAL.LengthScaleOption = LengthScaleOption{
 				Length: NewIntVal(yyDollar[2].bytes),
@@ -4416,7 +4412,7 @@ yydefault:
 		}
 	case 148:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:972
+//line sql.y:975
 		{
 			yyVAL.LengthScaleOption = LengthScaleOption{
 				Length: NewIntVal(yyDollar[2].bytes),
@@ -4425,508 +4421,508 @@ yydefault:
 		}
 	case 149:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:980
+//line sql.y:983
 		{
 			yyVAL.boolVal = BoolVal(false)
 		}
 	case 150:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:984
+//line sql.y:987
 		{
 			yyVAL.boolVal = BoolVal(true)
 		}
 	case 151:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:989
+//line sql.y:992
 		{
 			yyVAL.boolVal = BoolVal(false)
 		}
 	case 152:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:993
+//line sql.y:996
 		{
 			yyVAL.boolVal = BoolVal(true)
 		}
 	case 153:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:999
+//line sql.y:1002
 		{
 			yyVAL.boolVal = BoolVal(false)
 		}
 	case 154:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1003
+//line sql.y:1006
 		{
 			yyVAL.boolVal = BoolVal(false)
 		}
 	case 155:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1007
+//line sql.y:1010
 		{
 			yyVAL.boolVal = BoolVal(true)
 		}
 	case 156:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1012
+//line sql.y:1015
 		{
 			yyVAL.optVal = nil
 		}
 	case 157:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1016
+//line sql.y:1019
 		{
 			yyVAL.optVal = yyDollar[2].expr
 		}
 	case 158:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1021
+//line sql.y:1024
 		{
 			yyVAL.optVal = nil
 		}
 	case 159:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1025
+//line sql.y:1028
 		{
 			yyVAL.optVal = yyDollar[3].expr
 		}
 	case 160:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1030
+//line sql.y:1033
 		{
 			yyVAL.boolVal = BoolVal(false)
 		}
 	case 161:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1034
+//line sql.y:1037
 		{
 			yyVAL.boolVal = BoolVal(true)
 		}
 	case 162:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1039
+//line sql.y:1042
 		{
 			yyVAL.str = ""
 		}
 	case 163:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1043
+//line sql.y:1046
 		{
 			yyVAL.str = string(yyDollar[3].colIdent.String())
 		}
 	case 164:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1047
+//line sql.y:1050
 		{
 			yyVAL.str = string(yyDollar[3].bytes)
 		}
 	case 165:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1052
+//line sql.y:1055
 		{
 			yyVAL.str = ""
 		}
 	case 166:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1056
+//line sql.y:1059
 		{
 			yyVAL.str = string(yyDollar[2].colIdent.String())
 		}
 	case 167:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1060
+//line sql.y:1063
 		{
 			yyVAL.str = string(yyDollar[2].bytes)
 		}
 	case 168:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1065
+//line sql.y:1068
 		{
 			yyVAL.colKeyOpt = colKeyNone
 		}
 	case 169:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1069
+//line sql.y:1072
 		{
 			yyVAL.colKeyOpt = colKeyPrimary
 		}
 	case 170:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1073
+//line sql.y:1076
 		{
 			yyVAL.colKeyOpt = colKey
 		}
 	case 171:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1077
+//line sql.y:1080
 		{
 			yyVAL.colKeyOpt = colKeyUniqueKey
 		}
 	case 172:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1081
+//line sql.y:1084
 		{
 			yyVAL.colKeyOpt = colKeyUnique
 		}
 	case 173:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1086
+//line sql.y:1089
 		{
 			yyVAL.sqlVal = nil
 		}
 	case 174:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1090
+//line sql.y:1093
 		{
 			yyVAL.sqlVal = NewStrVal(yyDollar[2].bytes)
 		}
 	case 175:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:1096
+//line sql.y:1099
 		{
 			yyVAL.indexDefinition = &IndexDefinition{Info: yyDollar[1].indexInfo, Columns: yyDollar[3].indexColumns, Options: yyDollar[5].indexOptions}
 		}
 	case 176:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1100
+//line sql.y:1103
 		{
 			yyVAL.indexDefinition = &IndexDefinition{Info: yyDollar[1].indexInfo, Columns: yyDollar[3].indexColumns}
 		}
 	case 177:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1106
+//line sql.y:1109
 		{
 			yyVAL.indexOptions = []*IndexOption{yyDollar[1].indexOption}
 		}
 	case 178:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1110
+//line sql.y:1113
 		{
 			yyVAL.indexOptions = append(yyVAL.indexOptions, yyDollar[2].indexOption)
 		}
 	case 179:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1116
+//line sql.y:1119
 		{
 			yyVAL.indexOption = &IndexOption{Name: string(yyDollar[1].bytes), Using: string(yyDollar[2].colIdent.String())}
 		}
 	case 180:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1120
+//line sql.y:1123
 		{
 			// should not be string
 			yyVAL.indexOption = &IndexOption{Name: string(yyDollar[1].bytes), Value: NewIntVal(yyDollar[3].bytes)}
 		}
 	case 181:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1125
+//line sql.y:1128
 		{
 			yyVAL.indexOption = &IndexOption{Name: string(yyDollar[1].bytes), Value: NewStrVal(yyDollar[2].bytes)}
 		}
 	case 182:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1131
+//line sql.y:1134
 		{
 			yyVAL.str = ""
 		}
 	case 183:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1135
+//line sql.y:1138
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 184:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1141
+//line sql.y:1144
 		{
 			yyVAL.indexInfo = &IndexInfo{Type: string(yyDollar[1].bytes) + " " + string(yyDollar[2].bytes), Name: NewColIdent("PRIMARY"), Primary: true, Unique: true}
 		}
 	case 185:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1145
+//line sql.y:1148
 		{
 			yyVAL.indexInfo = &IndexInfo{Type: string(yyDollar[1].bytes) + " " + string(yyDollar[2].str), Name: NewColIdent(yyDollar[3].str), Spatial: true, Unique: false}
 		}
 	case 186:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1149
+//line sql.y:1152
 		{
 			yyVAL.indexInfo = &IndexInfo{Type: string(yyDollar[1].bytes) + " " + string(yyDollar[2].str), Name: NewColIdent(yyDollar[3].str), Unique: true}
 		}
 	case 187:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1153
+//line sql.y:1156
 		{
 			yyVAL.indexInfo = &IndexInfo{Type: string(yyDollar[1].bytes), Name: NewColIdent(yyDollar[2].str), Unique: true}
 		}
 	case 188:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1157
+//line sql.y:1160
 		{
 			yyVAL.indexInfo = &IndexInfo{Type: string(yyDollar[1].str), Name: NewColIdent(yyDollar[2].str), Unique: false}
 		}
 	case 189:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1163
+//line sql.y:1166
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 190:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1167
+//line sql.y:1170
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 191:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1171
+//line sql.y:1174
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 192:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1178
+//line sql.y:1181
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 193:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1182
+//line sql.y:1185
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 194:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1188
+//line sql.y:1191
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 195:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1192
+//line sql.y:1195
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 196:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1197
+//line sql.y:1200
 		{
 			yyVAL.str = ""
 		}
 	case 197:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1201
+//line sql.y:1204
 		{
 			yyVAL.str = string(yyDollar[1].colIdent.String())
 		}
 	case 198:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1207
+//line sql.y:1210
 		{
 			yyVAL.indexColumns = []*IndexColumn{yyDollar[1].indexColumn}
 		}
 	case 199:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1211
+//line sql.y:1214
 		{
 			yyVAL.indexColumns = append(yyVAL.indexColumns, yyDollar[3].indexColumn)
 		}
 	case 200:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1217
+//line sql.y:1220
 		{
 			yyVAL.indexColumn = &IndexColumn{Column: yyDollar[1].colIdent, Length: yyDollar[2].sqlVal}
 		}
 	case 201:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1223
+//line sql.y:1226
 		{
 			yyVAL.constraintDefinition = &ConstraintDefinition{Name: string(yyDollar[2].colIdent.String()), Details: yyDollar[3].constraintInfo}
 		}
 	case 202:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1227
+//line sql.y:1230
 		{
 			yyVAL.constraintDefinition = &ConstraintDefinition{Details: yyDollar[1].constraintInfo}
 		}
 	case 203:
 		yyDollar = yyS[yypt-10 : yypt+1]
-//line sql.y:1234
+//line sql.y:1237
 		{
 			yyVAL.constraintInfo = &ForeignKeyDefinition{Source: yyDollar[4].columns, ReferencedTable: yyDollar[7].tableName, ReferencedColumns: yyDollar[9].columns}
 		}
 	case 204:
 		yyDollar = yyS[yypt-11 : yypt+1]
-//line sql.y:1238
+//line sql.y:1241
 		{
 			yyVAL.constraintInfo = &ForeignKeyDefinition{Source: yyDollar[4].columns, ReferencedTable: yyDollar[7].tableName, ReferencedColumns: yyDollar[9].columns, OnDelete: yyDollar[11].ReferenceAction}
 		}
 	case 205:
 		yyDollar = yyS[yypt-11 : yypt+1]
-//line sql.y:1242
+//line sql.y:1245
 		{
 			yyVAL.constraintInfo = &ForeignKeyDefinition{Source: yyDollar[4].columns, ReferencedTable: yyDollar[7].tableName, ReferencedColumns: yyDollar[9].columns, OnUpdate: yyDollar[11].ReferenceAction}
 		}
 	case 206:
 		yyDollar = yyS[yypt-12 : yypt+1]
-//line sql.y:1246
+//line sql.y:1249
 		{
 			yyVAL.constraintInfo = &ForeignKeyDefinition{Source: yyDollar[4].columns, ReferencedTable: yyDollar[7].tableName, ReferencedColumns: yyDollar[9].columns, OnDelete: yyDollar[11].ReferenceAction, OnUpdate: yyDollar[12].ReferenceAction}
 		}
 	case 207:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1252
+//line sql.y:1255
 		{
 			yyVAL.ReferenceAction = yyDollar[3].ReferenceAction
 		}
 	case 208:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1258
+//line sql.y:1261
 		{
 			yyVAL.ReferenceAction = yyDollar[3].ReferenceAction
 		}
 	case 209:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1264
+//line sql.y:1267
 		{
 			yyVAL.ReferenceAction = Restrict
 		}
 	case 210:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1268
+//line sql.y:1271
 		{
 			yyVAL.ReferenceAction = Cascade
 		}
 	case 211:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1272
+//line sql.y:1275
 		{
 			yyVAL.ReferenceAction = NoAction
 		}
 	case 212:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1276
+//line sql.y:1279
 		{
 			yyVAL.ReferenceAction = SetDefault
 		}
 	case 213:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1280
+//line sql.y:1283
 		{
 			yyVAL.ReferenceAction = SetNull
 		}
 	case 214:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1285
+//line sql.y:1288
 		{
 			yyVAL.str = ""
 		}
 	case 215:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1289
+//line sql.y:1292
 		{
 			yyVAL.str = " " + string(yyDollar[1].str)
 		}
 	case 216:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1293
+//line sql.y:1296
 		{
 			yyVAL.str = string(yyDollar[1].str) + ", " + string(yyDollar[3].str)
 		}
 	case 217:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1301
+//line sql.y:1304
 		{
 			yyVAL.str = yyDollar[1].str
 		}
 	case 218:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1305
+//line sql.y:1308
 		{
 			yyVAL.str = yyDollar[1].str + " " + yyDollar[2].str
 		}
 	case 219:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1309
+//line sql.y:1312
 		{
 			yyVAL.str = yyDollar[1].str + "=" + yyDollar[3].str
 		}
 	case 220:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1315
+//line sql.y:1318
 		{
 			yyVAL.str = yyDollar[1].colIdent.String()
 		}
 	case 221:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1319
+//line sql.y:1322
 		{
 			yyVAL.str = "'" + string(yyDollar[1].bytes) + "'"
 		}
 	case 222:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1323
+//line sql.y:1326
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 223:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:1329
+//line sql.y:1332
 		{
 			yyVAL.statement = &DDL{Action: AlterStr, Table: yyDollar[4].tableName}
 		}
 	case 224:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:1333
+//line sql.y:1336
 		{
 			yyVAL.statement = &DDL{Action: AlterStr, Table: yyDollar[4].tableName}
 		}
 	case 225:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:1337
+//line sql.y:1340
 		{
 			yyVAL.statement = &DDL{Action: AlterStr, Table: yyDollar[4].tableName}
 		}
 	case 226:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:1341
+//line sql.y:1344
 		{
 			// Change this to a rename statement
 			yyVAL.statement = &DDL{Action: RenameStr, FromTables: TableNames{yyDollar[4].tableName}, ToTables: TableNames{yyDollar[7].tableName}}
 		}
 	case 227:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:1346
+//line sql.y:1349
 		{
 			// Rename an index can just be an alter
 			yyVAL.statement = &DDL{Action: AlterStr, Table: yyDollar[4].tableName}
 		}
 	case 228:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1351
+//line sql.y:1354
 		{
 			yyVAL.statement = &DDL{Action: AlterStr, Table: yyDollar[3].tableName.ToViewName()}
 		}
 	case 229:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:1355
+//line sql.y:1358
 		{
 			yyVAL.statement = &DDL{Action: AlterStr, Table: yyDollar[4].tableName, PartitionSpec: yyDollar[5].partSpec}
 		}
 	case 230:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1359
+//line sql.y:1362
 		{
 			yyVAL.statement = &DBDDL{Action: AlterStr, DBName: string(yyDollar[3].colIdent.String())}
 		}
 	case 231:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1363
+//line sql.y:1366
 		{
 			yyVAL.statement = &DBDDL{Action: AlterStr, DBName: string(yyDollar[3].colIdent.String())}
 		}
 	case 232:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:1367
+//line sql.y:1370
 		{
 			yyVAL.statement = &DDL{
 				Action: CreateVindexStr,
@@ -4940,7 +4936,7 @@ yydefault:
 		}
 	case 233:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:1379
+//line sql.y:1382
 		{
 			yyVAL.statement = &DDL{
 				Action: DropVindexStr,
@@ -4952,19 +4948,19 @@ yydefault:
 		}
 	case 234:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:1389
+//line sql.y:1392
 		{
 			yyVAL.statement = &DDL{Action: AddVschemaTableStr, Table: yyDollar[5].tableName}
 		}
 	case 235:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:1393
+//line sql.y:1396
 		{
 			yyVAL.statement = &DDL{Action: DropVschemaTableStr, Table: yyDollar[5].tableName}
 		}
 	case 236:
 		yyDollar = yyS[yypt-12 : yypt+1]
-//line sql.y:1397
+//line sql.y:1400
 		{
 			yyVAL.statement = &DDL{
 				Action: AddColVindexStr,
@@ -4979,7 +4975,7 @@ yydefault:
 		}
 	case 237:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:1410
+//line sql.y:1413
 		{
 			yyVAL.statement = &DDL{
 				Action: DropColVindexStr,
@@ -4991,13 +4987,13 @@ yydefault:
 		}
 	case 238:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:1420
+//line sql.y:1423
 		{
 			yyVAL.statement = &DDL{Action: AddSequenceStr, Table: yyDollar[5].tableName}
 		}
 	case 239:
 		yyDollar = yyS[yypt-9 : yypt+1]
-//line sql.y:1424
+//line sql.y:1427
 		{
 			yyVAL.statement = &DDL{
 				Action: AddAutoIncStr,
@@ -5010,49 +5006,49 @@ yydefault:
 		}
 	case 254:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:1453
+//line sql.y:1456
 		{
 			yyVAL.partSpec = &PartitionSpec{Action: ReorganizeStr, Name: yyDollar[3].colIdent, Definitions: yyDollar[6].partDefs}
 		}
 	case 255:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1459
+//line sql.y:1462
 		{
 			yyVAL.partDefs = []*PartitionDefinition{yyDollar[1].partDef}
 		}
 	case 256:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1463
+//line sql.y:1466
 		{
 			yyVAL.partDefs = append(yyDollar[1].partDefs, yyDollar[3].partDef)
 		}
 	case 257:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:1469
+//line sql.y:1472
 		{
 			yyVAL.partDef = &PartitionDefinition{Name: yyDollar[2].colIdent, Limit: yyDollar[7].expr}
 		}
 	case 258:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:1473
+//line sql.y:1476
 		{
 			yyVAL.partDef = &PartitionDefinition{Name: yyDollar[2].colIdent, Maxvalue: true}
 		}
 	case 259:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1479
+//line sql.y:1482
 		{
 			yyVAL.statement = yyDollar[3].ddl
 		}
 	case 260:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1485
+//line sql.y:1488
 		{
 			yyVAL.ddl = &DDL{Action: RenameStr, FromTables: TableNames{yyDollar[1].tableName}, ToTables: TableNames{yyDollar[3].tableName}}
 		}
 	case 261:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:1489
+//line sql.y:1492
 		{
 			yyVAL.ddl = yyDollar[1].ddl
 			yyVAL.ddl.FromTables = append(yyVAL.ddl.FromTables, yyDollar[3].tableName)
@@ -5060,7 +5056,7 @@ yydefault:
 		}
 	case 262:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1497
+//line sql.y:1500
 		{
 			var exists bool
 			if yyDollar[3].byt != 0 {
@@ -5070,14 +5066,14 @@ yydefault:
 		}
 	case 263:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:1505
+//line sql.y:1508
 		{
 			// Change this to an alter statement
 			yyVAL.statement = &DDL{Action: AlterStr, Table: yyDollar[5].tableName}
 		}
 	case 264:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:1510
+//line sql.y:1513
 		{
 			var exists bool
 			if yyDollar[3].byt != 0 {
@@ -5087,143 +5083,143 @@ yydefault:
 		}
 	case 265:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1518
+//line sql.y:1521
 		{
 			yyVAL.statement = &DBDDL{Action: DropStr, DBName: string(yyDollar[4].colIdent.String())}
 		}
 	case 266:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1522
+//line sql.y:1525
 		{
 			yyVAL.statement = &DBDDL{Action: DropStr, DBName: string(yyDollar[4].colIdent.String())}
 		}
 	case 267:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1528
+//line sql.y:1531
 		{
 			yyVAL.statement = &DDL{Action: TruncateStr, Table: yyDollar[3].tableName}
 		}
 	case 268:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1532
+//line sql.y:1535
 		{
 			yyVAL.statement = &DDL{Action: TruncateStr, Table: yyDollar[2].tableName}
 		}
 	case 269:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1537
+//line sql.y:1540
 		{
 			yyVAL.statement = &OtherRead{}
 		}
 	case 270:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1543
+//line sql.y:1546
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes) + " " + string(yyDollar[3].colIdent.String())}
 		}
 	case 271:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1548
+//line sql.y:1551
 		{
 			showTablesOpt := &ShowTablesOpt{Filter: yyDollar[4].showFilter}
 			yyVAL.statement = &Show{Type: CharsetStr, ShowTablesOpt: showTablesOpt}
 		}
 	case 272:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1553
+//line sql.y:1556
 		{
 			showTablesOpt := &ShowTablesOpt{Filter: yyDollar[3].showFilter}
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes), ShowTablesOpt: showTablesOpt}
 		}
 	case 273:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1558
+//line sql.y:1561
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes) + " " + string(yyDollar[3].bytes)}
 		}
 	case 274:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1563
+//line sql.y:1566
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes) + " " + string(yyDollar[3].colIdent.String())}
 		}
 	case 275:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1567
+//line sql.y:1570
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes) + " " + string(yyDollar[3].bytes)}
 		}
 	case 276:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1571
+//line sql.y:1574
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes) + " " + string(yyDollar[3].bytes), Table: yyDollar[4].tableName}
 		}
 	case 277:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1575
+//line sql.y:1578
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes) + " " + string(yyDollar[3].bytes)}
 		}
 	case 278:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1579
+//line sql.y:1582
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes) + " " + string(yyDollar[3].bytes)}
 		}
 	case 279:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1583
+//line sql.y:1586
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes)}
 		}
 	case 280:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1587
+//line sql.y:1590
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes)}
 		}
 	case 281:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:1591
+//line sql.y:1594
 		{
 			showTablesOpt := &ShowTablesOpt{DbName: yyDollar[6].str, Filter: yyDollar[7].showFilter}
 			yyVAL.statement = &Show{Extended: string(yyDollar[2].str), Type: string(yyDollar[3].str), ShowTablesOpt: showTablesOpt, OnTable: yyDollar[5].tableName}
 		}
 	case 282:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1597
+//line sql.y:1600
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes)}
 		}
 	case 283:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1601
+//line sql.y:1604
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes)}
 		}
 	case 284:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1605
+//line sql.y:1608
 		{
 			yyVAL.statement = &Show{Scope: yyDollar[2].str, Type: string(yyDollar[3].bytes)}
 		}
 	case 285:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1609
+//line sql.y:1612
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes)}
 		}
 	case 286:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:1613
+//line sql.y:1616
 		{
 			showTablesOpt := &ShowTablesOpt{Full: yyDollar[2].str, DbName: yyDollar[6].str, Filter: yyDollar[7].showFilter}
 			yyVAL.statement = &Show{Type: string(yyDollar[3].str), ShowTablesOpt: showTablesOpt, OnTable: yyDollar[5].tableName}
 		}
 	case 287:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:1618
+//line sql.y:1621
 		{
 			// this is ugly, but I couldn't find a better way for now
 			if yyDollar[3].str == "processlist" {
@@ -5235,19 +5231,19 @@ yydefault:
 		}
 	case 288:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1628
+//line sql.y:1631
 		{
 			yyVAL.statement = &Show{Scope: yyDollar[2].str, Type: string(yyDollar[3].bytes)}
 		}
 	case 289:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1632
+//line sql.y:1635
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes)}
 		}
 	case 290:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1636
+//line sql.y:1639
 		{
 			// Cannot dereference $4 directly, or else the parser stackcannot be pooled. See yyParsePooled
 			showCollationFilterOpt := yyDollar[4].expr
@@ -5255,441 +5251,441 @@ yydefault:
 		}
 	case 291:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:1642
+//line sql.y:1645
 		{
 			showTablesOpt := &ShowTablesOpt{Filter: yyDollar[4].showFilter}
 			yyVAL.statement = &Show{Scope: string(yyDollar[2].bytes), Type: string(yyDollar[3].bytes), ShowTablesOpt: showTablesOpt}
 		}
 	case 292:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1647
+//line sql.y:1650
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes) + " " + string(yyDollar[3].bytes)}
 		}
 	case 293:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1651
+//line sql.y:1654
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes) + " " + string(yyDollar[3].bytes)}
 		}
 	case 294:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:1655
+//line sql.y:1658
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes) + " " + string(yyDollar[3].bytes), OnTable: yyDollar[5].tableName}
 		}
 	case 295:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1659
+//line sql.y:1662
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].bytes)}
 		}
 	case 296:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1673
+//line sql.y:1676
 		{
 			yyVAL.statement = &Show{Type: string(yyDollar[2].colIdent.String())}
 		}
 	case 297:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1679
+//line sql.y:1682
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 298:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1683
+//line sql.y:1686
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 299:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1689
+//line sql.y:1692
 		{
 			yyVAL.str = ""
 		}
 	case 300:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1693
+//line sql.y:1696
 		{
 			yyVAL.str = "extended "
 		}
 	case 301:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1699
+//line sql.y:1702
 		{
 			yyVAL.str = ""
 		}
 	case 302:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1703
+//line sql.y:1706
 		{
 			yyVAL.str = "full "
 		}
 	case 303:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1709
+//line sql.y:1712
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 304:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1713
+//line sql.y:1716
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 305:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1719
+//line sql.y:1722
 		{
 			yyVAL.str = ""
 		}
 	case 306:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1723
+//line sql.y:1726
 		{
 			yyVAL.str = yyDollar[2].tableIdent.v
 		}
 	case 307:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1727
+//line sql.y:1730
 		{
 			yyVAL.str = yyDollar[2].tableIdent.v
 		}
 	case 308:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1733
+//line sql.y:1736
 		{
 			yyVAL.showFilter = nil
 		}
 	case 309:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1737
+//line sql.y:1740
 		{
 			yyVAL.showFilter = &ShowFilter{Like: string(yyDollar[2].bytes)}
 		}
 	case 310:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1741
+//line sql.y:1744
 		{
 			yyVAL.showFilter = &ShowFilter{Filter: yyDollar[2].expr}
 		}
 	case 311:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1747
+//line sql.y:1750
 		{
 			yyVAL.showFilter = nil
 		}
 	case 312:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1751
+//line sql.y:1754
 		{
 			yyVAL.showFilter = &ShowFilter{Like: string(yyDollar[2].bytes)}
 		}
 	case 313:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1757
+//line sql.y:1760
 		{
 			yyVAL.str = ""
 		}
 	case 314:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1761
+//line sql.y:1764
 		{
 			yyVAL.str = SessionStr
 		}
 	case 315:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1765
+//line sql.y:1768
 		{
 			yyVAL.str = GlobalStr
 		}
 	case 316:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1771
+//line sql.y:1774
 		{
 			yyVAL.statement = &Use{DBName: yyDollar[2].tableIdent}
 		}
 	case 317:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1775
+//line sql.y:1778
 		{
 			yyVAL.statement = &Use{DBName: TableIdent{v: ""}}
 		}
 	case 318:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1781
+//line sql.y:1784
 		{
 			yyVAL.statement = &Begin{}
 		}
 	case 319:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1785
+//line sql.y:1788
 		{
 			yyVAL.statement = &Begin{}
 		}
 	case 320:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1791
+//line sql.y:1794
 		{
 			yyVAL.statement = &Commit{}
 		}
 	case 321:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1797
+//line sql.y:1800
 		{
 			yyVAL.statement = &Rollback{}
 		}
 	case 322:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1803
+//line sql.y:1806
 		{
 			yyVAL.statement = &OtherRead{}
 		}
 	case 323:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1807
+//line sql.y:1810
 		{
 			yyVAL.statement = &OtherRead{}
 		}
 	case 324:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1811
+//line sql.y:1814
 		{
 			yyVAL.statement = &OtherRead{}
 		}
 	case 325:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1815
+//line sql.y:1818
 		{
 			yyVAL.statement = &OtherAdmin{}
 		}
 	case 326:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1819
+//line sql.y:1822
 		{
 			yyVAL.statement = &OtherAdmin{}
 		}
 	case 327:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1823
+//line sql.y:1826
 		{
 			yyVAL.statement = &OtherAdmin{}
 		}
 	case 328:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1827
+//line sql.y:1830
 		{
 			yyVAL.statement = &OtherAdmin{}
 		}
 	case 329:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1833
+//line sql.y:1836
 		{
 			yyVAL.statement = &DDL{Action: FlushStr}
 		}
 	case 330:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1837
+//line sql.y:1840
 		{
 			setAllowComments(yylex, true)
 		}
 	case 331:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1841
+//line sql.y:1844
 		{
 			yyVAL.bytes2 = yyDollar[2].bytes2
 			setAllowComments(yylex, false)
 		}
 	case 332:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1847
+//line sql.y:1850
 		{
 			yyVAL.bytes2 = nil
 		}
 	case 333:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1851
+//line sql.y:1854
 		{
 			yyVAL.bytes2 = append(yyDollar[1].bytes2, yyDollar[2].bytes)
 		}
 	case 334:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1857
+//line sql.y:1860
 		{
 			yyVAL.str = UnionStr
 		}
 	case 335:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1861
+//line sql.y:1864
 		{
 			yyVAL.str = UnionAllStr
 		}
 	case 336:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1865
+//line sql.y:1868
 		{
 			yyVAL.str = UnionDistinctStr
 		}
 	case 337:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1870
+//line sql.y:1873
 		{
 			yyVAL.str = ""
 		}
 	case 338:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1874
+//line sql.y:1877
 		{
 			yyVAL.str = SQLNoCacheStr
 		}
 	case 339:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1878
+//line sql.y:1881
 		{
 			yyVAL.str = SQLCacheStr
 		}
 	case 340:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1883
+//line sql.y:1886
 		{
 			yyVAL.str = ""
 		}
 	case 341:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1887
+//line sql.y:1890
 		{
 			yyVAL.str = DistinctStr
 		}
 	case 342:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1891
+//line sql.y:1894
 		{
 			yyVAL.str = DistinctStr
 		}
 	case 343:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1896
+//line sql.y:1899
 		{
 			yyVAL.str = ""
 		}
 	case 344:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1900
+//line sql.y:1903
 		{
 			yyVAL.str = StraightJoinHint
 		}
 	case 345:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1905
+//line sql.y:1908
 		{
 			yyVAL.selectExprs = nil
 		}
 	case 346:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1909
+//line sql.y:1912
 		{
 			yyVAL.selectExprs = yyDollar[1].selectExprs
 		}
 	case 347:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1915
+//line sql.y:1918
 		{
 			yyVAL.selectExprs = SelectExprs{yyDollar[1].selectExpr}
 		}
 	case 348:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1919
+//line sql.y:1922
 		{
 			yyVAL.selectExprs = append(yyVAL.selectExprs, yyDollar[3].selectExpr)
 		}
 	case 349:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1925
+//line sql.y:1928
 		{
 			yyVAL.selectExpr = &StarExpr{}
 		}
 	case 350:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1929
+//line sql.y:1932
 		{
 			yyVAL.selectExpr = &AliasedExpr{Expr: yyDollar[1].expr, As: yyDollar[2].colIdent}
 		}
 	case 351:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1933
+//line sql.y:1936
 		{
 			yyVAL.selectExpr = &StarExpr{TableName: TableName{Name: yyDollar[1].tableIdent}}
 		}
 	case 352:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:1937
+//line sql.y:1940
 		{
 			yyVAL.selectExpr = &StarExpr{TableName: TableName{Qualifier: yyDollar[1].tableIdent, Name: yyDollar[3].tableIdent}}
 		}
 	case 353:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1942
+//line sql.y:1945
 		{
 			yyVAL.colIdent = ColIdent{}
 		}
 	case 354:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1946
+//line sql.y:1949
 		{
 			yyVAL.colIdent = yyDollar[1].colIdent
 		}
 	case 355:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1950
+//line sql.y:1953
 		{
 			yyVAL.colIdent = yyDollar[2].colIdent
 		}
 	case 357:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1957
+//line sql.y:1960
 		{
 			yyVAL.colIdent = NewColIdent(string(yyDollar[1].bytes))
 		}
 	case 358:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:1962
+//line sql.y:1965
 		{
 			yyVAL.tableExprs = TableExprs{&AliasedTableExpr{Expr: TableName{Name: NewTableIdent("dual")}}}
 		}
 	case 359:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:1966
+//line sql.y:1969
 		{
 			yyVAL.tableExprs = yyDollar[2].tableExprs
 		}
 	case 360:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1972
+//line sql.y:1975
 		{
 			yyVAL.tableExprs = TableExprs{yyDollar[1].tableExpr}
 		}
 	case 361:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1976
+//line sql.y:1979
 		{
 			yyVAL.tableExprs = append(yyVAL.tableExprs, yyDollar[3].tableExpr)
 		}
 	case 364:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1986
+//line sql.y:1989
 		{
 			yyVAL.tableExpr = yyDollar[1].aliasedTableName
 		}
 	case 365:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:1990
+//line sql.y:1993
 		{
 			yyVAL.tableExpr = &AliasedTableExpr{Expr: yyDollar[1].subquery, As: yyDollar[3].tableIdent}
 		}
 	case 366:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:1994
+//line sql.y:1997
 		{
 			// missed alias for subquery
 			yylex.Error("Every derived table must have its own alias")
@@ -5697,199 +5693,199 @@ yydefault:
 		}
 	case 367:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2000
+//line sql.y:2003
 		{
 			yyVAL.tableExpr = &ParenTableExpr{Exprs: yyDollar[2].tableExprs}
 		}
 	case 368:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2006
+//line sql.y:2009
 		{
 			yyVAL.aliasedTableName = &AliasedTableExpr{Expr: yyDollar[1].tableName, As: yyDollar[2].tableIdent, Hints: yyDollar[3].indexHints}
 		}
 	case 369:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:2010
+//line sql.y:2013
 		{
 			yyVAL.aliasedTableName = &AliasedTableExpr{Expr: yyDollar[1].tableName, Partitions: yyDollar[4].partitions, As: yyDollar[6].tableIdent, Hints: yyDollar[7].indexHints}
 		}
 	case 370:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2016
+//line sql.y:2019
 		{
 			yyVAL.columns = Columns{yyDollar[1].colIdent}
 		}
 	case 371:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2020
+//line sql.y:2023
 		{
 			yyVAL.columns = append(yyVAL.columns, yyDollar[3].colIdent)
 		}
 	case 372:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2026
+//line sql.y:2029
 		{
 			yyVAL.partitions = Partitions{yyDollar[1].colIdent}
 		}
 	case 373:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2030
+//line sql.y:2033
 		{
 			yyVAL.partitions = append(yyVAL.partitions, yyDollar[3].colIdent)
 		}
 	case 374:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2043
+//line sql.y:2046
 		{
 			yyVAL.tableExpr = &JoinTableExpr{LeftExpr: yyDollar[1].tableExpr, Join: yyDollar[2].str, RightExpr: yyDollar[3].tableExpr, Condition: yyDollar[4].joinCondition}
 		}
 	case 375:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2047
+//line sql.y:2050
 		{
 			yyVAL.tableExpr = &JoinTableExpr{LeftExpr: yyDollar[1].tableExpr, Join: yyDollar[2].str, RightExpr: yyDollar[3].tableExpr, Condition: yyDollar[4].joinCondition}
 		}
 	case 376:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2051
+//line sql.y:2054
 		{
 			yyVAL.tableExpr = &JoinTableExpr{LeftExpr: yyDollar[1].tableExpr, Join: yyDollar[2].str, RightExpr: yyDollar[3].tableExpr, Condition: yyDollar[4].joinCondition}
 		}
 	case 377:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2055
+//line sql.y:2058
 		{
 			yyVAL.tableExpr = &JoinTableExpr{LeftExpr: yyDollar[1].tableExpr, Join: yyDollar[2].str, RightExpr: yyDollar[3].tableExpr}
 		}
 	case 378:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2061
+//line sql.y:2064
 		{
 			yyVAL.joinCondition = JoinCondition{On: yyDollar[2].expr}
 		}
 	case 379:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2063
+//line sql.y:2066
 		{
 			yyVAL.joinCondition = JoinCondition{Using: yyDollar[3].columns}
 		}
 	case 380:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2067
+//line sql.y:2070
 		{
 			yyVAL.joinCondition = JoinCondition{}
 		}
 	case 381:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2069
+//line sql.y:2072
 		{
 			yyVAL.joinCondition = yyDollar[1].joinCondition
 		}
 	case 382:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2073
+//line sql.y:2076
 		{
 			yyVAL.joinCondition = JoinCondition{}
 		}
 	case 383:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2075
+//line sql.y:2078
 		{
 			yyVAL.joinCondition = JoinCondition{On: yyDollar[2].expr}
 		}
 	case 384:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2078
+//line sql.y:2081
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 385:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2080
+//line sql.y:2083
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 386:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2083
+//line sql.y:2086
 		{
 			yyVAL.tableIdent = NewTableIdent("")
 		}
 	case 387:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2087
+//line sql.y:2090
 		{
 			yyVAL.tableIdent = yyDollar[1].tableIdent
 		}
 	case 388:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2091
+//line sql.y:2094
 		{
 			yyVAL.tableIdent = yyDollar[2].tableIdent
 		}
 	case 390:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2098
+//line sql.y:2101
 		{
 			yyVAL.tableIdent = NewTableIdent(string(yyDollar[1].bytes))
 		}
 	case 391:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2104
+//line sql.y:2107
 		{
 			yyVAL.str = JoinStr
 		}
 	case 392:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2108
+//line sql.y:2111
 		{
 			yyVAL.str = JoinStr
 		}
 	case 393:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2112
+//line sql.y:2115
 		{
 			yyVAL.str = JoinStr
 		}
 	case 394:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2118
+//line sql.y:2121
 		{
 			yyVAL.str = StraightJoinStr
 		}
 	case 395:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2124
+//line sql.y:2127
 		{
 			yyVAL.str = LeftJoinStr
 		}
 	case 396:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2128
+//line sql.y:2131
 		{
 			yyVAL.str = LeftJoinStr
 		}
 	case 397:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2132
+//line sql.y:2135
 		{
 			yyVAL.str = RightJoinStr
 		}
 	case 398:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2136
+//line sql.y:2139
 		{
 			yyVAL.str = RightJoinStr
 		}
 	case 399:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2142
+//line sql.y:2145
 		{
 			yyVAL.str = NaturalJoinStr
 		}
 	case 400:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2146
+//line sql.y:2149
 		{
 			if yyDollar[2].str == LeftJoinStr {
 				yyVAL.str = NaturalLeftJoinStr
@@ -5899,469 +5895,469 @@ yydefault:
 		}
 	case 401:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2156
+//line sql.y:2159
 		{
 			yyVAL.tableName = yyDollar[2].tableName
 		}
 	case 402:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2160
+//line sql.y:2163
 		{
 			yyVAL.tableName = yyDollar[1].tableName
 		}
 	case 403:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2166
+//line sql.y:2169
 		{
 			yyVAL.tableName = TableName{Name: yyDollar[1].tableIdent}
 		}
 	case 404:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2170
+//line sql.y:2173
 		{
 			yyVAL.tableName = TableName{Qualifier: yyDollar[1].tableIdent, Name: yyDollar[3].tableIdent}
 		}
 	case 405:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2176
+//line sql.y:2179
 		{
 			yyVAL.tableName = TableName{Name: yyDollar[1].tableIdent}
 		}
 	case 406:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2181
+//line sql.y:2184
 		{
 			yyVAL.indexHints = nil
 		}
 	case 407:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:2185
+//line sql.y:2188
 		{
 			yyVAL.indexHints = &IndexHints{Type: UseStr, Indexes: yyDollar[4].columns}
 		}
 	case 408:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2189
+//line sql.y:2192
 		{
 			yyVAL.indexHints = &IndexHints{Type: UseStr}
 		}
 	case 409:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:2193
+//line sql.y:2196
 		{
 			yyVAL.indexHints = &IndexHints{Type: IgnoreStr, Indexes: yyDollar[4].columns}
 		}
 	case 410:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:2197
+//line sql.y:2200
 		{
 			yyVAL.indexHints = &IndexHints{Type: ForceStr, Indexes: yyDollar[4].columns}
 		}
 	case 411:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2202
+//line sql.y:2205
 		{
 			yyVAL.expr = nil
 		}
 	case 412:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2206
+//line sql.y:2209
 		{
 			yyVAL.expr = yyDollar[2].expr
 		}
 	case 413:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2212
+//line sql.y:2215
 		{
 			yyVAL.expr = yyDollar[1].expr
 		}
 	case 414:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2216
+//line sql.y:2219
 		{
 			yyVAL.expr = &AndExpr{Left: yyDollar[1].expr, Right: yyDollar[3].expr}
 		}
 	case 415:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2220
+//line sql.y:2223
 		{
 			yyVAL.expr = &OrExpr{Left: yyDollar[1].expr, Right: yyDollar[3].expr}
 		}
 	case 416:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2224
+//line sql.y:2227
 		{
 			yyVAL.expr = &NotExpr{Expr: yyDollar[2].expr}
 		}
 	case 417:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2228
+//line sql.y:2231
 		{
 			yyVAL.expr = &IsExpr{Operator: yyDollar[3].str, Expr: yyDollar[1].expr}
 		}
 	case 418:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2232
+//line sql.y:2235
 		{
 			yyVAL.expr = yyDollar[1].expr
 		}
 	case 419:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2236
+//line sql.y:2239
 		{
 			yyVAL.expr = &Default{ColName: yyDollar[2].str}
 		}
 	case 420:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2242
+//line sql.y:2245
 		{
 			yyVAL.str = ""
 		}
 	case 421:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2246
+//line sql.y:2249
 		{
 			yyVAL.str = string(yyDollar[2].colIdent.String())
 		}
 	case 422:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2252
+//line sql.y:2255
 		{
 			yyVAL.boolVal = BoolVal(true)
 		}
 	case 423:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2256
+//line sql.y:2259
 		{
 			yyVAL.boolVal = BoolVal(false)
 		}
 	case 424:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2262
+//line sql.y:2265
 		{
 			yyVAL.expr = &ComparisonExpr{Left: yyDollar[1].expr, Operator: yyDollar[2].str, Right: yyDollar[3].expr}
 		}
 	case 425:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2266
+//line sql.y:2269
 		{
 			yyVAL.expr = &ComparisonExpr{Left: yyDollar[1].expr, Operator: InStr, Right: yyDollar[3].colTuple}
 		}
 	case 426:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2270
+//line sql.y:2273
 		{
 			yyVAL.expr = &ComparisonExpr{Left: yyDollar[1].expr, Operator: NotInStr, Right: yyDollar[4].colTuple}
 		}
 	case 427:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2274
+//line sql.y:2277
 		{
 			yyVAL.expr = &ComparisonExpr{Left: yyDollar[1].expr, Operator: LikeStr, Right: yyDollar[3].expr, Escape: yyDollar[4].expr}
 		}
 	case 428:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:2278
+//line sql.y:2281
 		{
 			yyVAL.expr = &ComparisonExpr{Left: yyDollar[1].expr, Operator: NotLikeStr, Right: yyDollar[4].expr, Escape: yyDollar[5].expr}
 		}
 	case 429:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2282
+//line sql.y:2285
 		{
 			yyVAL.expr = &ComparisonExpr{Left: yyDollar[1].expr, Operator: RegexpStr, Right: yyDollar[3].expr}
 		}
 	case 430:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2286
+//line sql.y:2289
 		{
 			yyVAL.expr = &ComparisonExpr{Left: yyDollar[1].expr, Operator: NotRegexpStr, Right: yyDollar[4].expr}
 		}
 	case 431:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:2290
+//line sql.y:2293
 		{
 			yyVAL.expr = &RangeCond{Left: yyDollar[1].expr, Operator: BetweenStr, From: yyDollar[3].expr, To: yyDollar[5].expr}
 		}
 	case 432:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:2294
+//line sql.y:2297
 		{
 			yyVAL.expr = &RangeCond{Left: yyDollar[1].expr, Operator: NotBetweenStr, From: yyDollar[4].expr, To: yyDollar[6].expr}
 		}
 	case 433:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2298
+//line sql.y:2301
 		{
 			yyVAL.expr = &ExistsExpr{Subquery: yyDollar[2].subquery}
 		}
 	case 434:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2304
+//line sql.y:2307
 		{
 			yyVAL.str = IsNullStr
 		}
 	case 435:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2308
+//line sql.y:2311
 		{
 			yyVAL.str = IsNotNullStr
 		}
 	case 436:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2312
+//line sql.y:2315
 		{
 			yyVAL.str = IsTrueStr
 		}
 	case 437:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2316
+//line sql.y:2319
 		{
 			yyVAL.str = IsNotTrueStr
 		}
 	case 438:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2320
+//line sql.y:2323
 		{
 			yyVAL.str = IsFalseStr
 		}
 	case 439:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2324
+//line sql.y:2327
 		{
 			yyVAL.str = IsNotFalseStr
 		}
 	case 440:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2330
+//line sql.y:2333
 		{
 			yyVAL.str = EqualStr
 		}
 	case 441:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2334
+//line sql.y:2337
 		{
 			yyVAL.str = LessThanStr
 		}
 	case 442:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2338
+//line sql.y:2341
 		{
 			yyVAL.str = GreaterThanStr
 		}
 	case 443:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2342
+//line sql.y:2345
 		{
 			yyVAL.str = LessEqualStr
 		}
 	case 444:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2346
+//line sql.y:2349
 		{
 			yyVAL.str = GreaterEqualStr
 		}
 	case 445:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2350
+//line sql.y:2353
 		{
 			yyVAL.str = NotEqualStr
 		}
 	case 446:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2354
+//line sql.y:2357
 		{
 			yyVAL.str = NullSafeEqualStr
 		}
 	case 447:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2359
+//line sql.y:2362
 		{
 			yyVAL.expr = nil
 		}
 	case 448:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2363
+//line sql.y:2366
 		{
 			yyVAL.expr = yyDollar[2].expr
 		}
 	case 449:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2369
+//line sql.y:2372
 		{
 			yyVAL.colTuple = yyDollar[1].valTuple
 		}
 	case 450:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2373
+//line sql.y:2376
 		{
 			yyVAL.colTuple = yyDollar[1].subquery
 		}
 	case 451:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2377
+//line sql.y:2380
 		{
 			yyVAL.colTuple = ListArg(yyDollar[1].bytes)
 		}
 	case 452:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2383
+//line sql.y:2386
 		{
 			yyVAL.subquery = &Subquery{yyDollar[2].selStmt}
 		}
 	case 453:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2389
+//line sql.y:2392
 		{
 			yyVAL.exprs = Exprs{yyDollar[1].expr}
 		}
 	case 454:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2393
+//line sql.y:2396
 		{
 			yyVAL.exprs = append(yyDollar[1].exprs, yyDollar[3].expr)
 		}
 	case 455:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2399
+//line sql.y:2402
 		{
 			yyVAL.expr = yyDollar[1].expr
 		}
 	case 456:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2403
+//line sql.y:2406
 		{
 			yyVAL.expr = yyDollar[1].boolVal
 		}
 	case 457:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2407
+//line sql.y:2410
 		{
 			yyVAL.expr = yyDollar[1].colName
 		}
 	case 458:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2411
+//line sql.y:2414
 		{
 			yyVAL.expr = yyDollar[1].expr
 		}
 	case 459:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2415
+//line sql.y:2418
 		{
 			yyVAL.expr = yyDollar[1].subquery
 		}
 	case 460:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2419
+//line sql.y:2422
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: BitAndStr, Right: yyDollar[3].expr}
 		}
 	case 461:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2423
+//line sql.y:2426
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: BitOrStr, Right: yyDollar[3].expr}
 		}
 	case 462:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2427
+//line sql.y:2430
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: BitXorStr, Right: yyDollar[3].expr}
 		}
 	case 463:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2431
+//line sql.y:2434
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: PlusStr, Right: yyDollar[3].expr}
 		}
 	case 464:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2435
+//line sql.y:2438
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: MinusStr, Right: yyDollar[3].expr}
 		}
 	case 465:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2439
+//line sql.y:2442
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: MultStr, Right: yyDollar[3].expr}
 		}
 	case 466:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2443
+//line sql.y:2446
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: DivStr, Right: yyDollar[3].expr}
 		}
 	case 467:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2447
+//line sql.y:2450
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: IntDivStr, Right: yyDollar[3].expr}
 		}
 	case 468:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2451
+//line sql.y:2454
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: ModStr, Right: yyDollar[3].expr}
 		}
 	case 469:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2455
+//line sql.y:2458
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: ModStr, Right: yyDollar[3].expr}
 		}
 	case 470:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2459
+//line sql.y:2462
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: ShiftLeftStr, Right: yyDollar[3].expr}
 		}
 	case 471:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2463
+//line sql.y:2466
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].expr, Operator: ShiftRightStr, Right: yyDollar[3].expr}
 		}
 	case 472:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2467
+//line sql.y:2470
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].colName, Operator: JSONExtractOp, Right: yyDollar[3].expr}
 		}
 	case 473:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2471
+//line sql.y:2474
 		{
 			yyVAL.expr = &BinaryExpr{Left: yyDollar[1].colName, Operator: JSONUnquoteExtractOp, Right: yyDollar[3].expr}
 		}
 	case 474:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2475
+//line sql.y:2478
 		{
 			yyVAL.expr = &CollateExpr{Expr: yyDollar[1].expr, Charset: yyDollar[3].str}
 		}
 	case 475:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2479
+//line sql.y:2482
 		{
 			yyVAL.expr = &UnaryExpr{Operator: BinaryStr, Expr: yyDollar[2].expr}
 		}
 	case 476:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2483
+//line sql.y:2486
 		{
 			yyVAL.expr = &UnaryExpr{Operator: UBinaryStr, Expr: yyDollar[2].expr}
 		}
 	case 477:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2487
+//line sql.y:2490
 		{
 			yyVAL.expr = &UnaryExpr{Operator: Utf8mb4Str, Expr: yyDollar[2].expr}
 		}
 	case 478:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2491
+//line sql.y:2494
 		{
 			if num, ok := yyDollar[2].expr.(*SQLVal); ok && num.Type == IntVal {
 				yyVAL.expr = num
@@ -6371,7 +6367,7 @@ yydefault:
 		}
 	case 479:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2499
+//line sql.y:2502
 		{
 			if num, ok := yyDollar[2].expr.(*SQLVal); ok && num.Type == IntVal {
 				// Handle double negative
@@ -6387,19 +6383,19 @@ yydefault:
 		}
 	case 480:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2513
+//line sql.y:2516
 		{
 			yyVAL.expr = &UnaryExpr{Operator: TildaStr, Expr: yyDollar[2].expr}
 		}
 	case 481:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2517
+//line sql.y:2520
 		{
 			yyVAL.expr = &UnaryExpr{Operator: BangStr, Expr: yyDollar[2].expr}
 		}
 	case 482:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2521
+//line sql.y:2524
 		{
 			// This rule prevents the usage of INTERVAL
 			// as a function. If support is needed for that,
@@ -6409,325 +6405,325 @@ yydefault:
 		}
 	case 487:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2539
+//line sql.y:2542
 		{
 			yyVAL.expr = &FuncExpr{Name: yyDollar[1].colIdent, Exprs: yyDollar[3].selectExprs}
 		}
 	case 488:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:2543
+//line sql.y:2546
 		{
 			yyVAL.expr = &FuncExpr{Name: yyDollar[1].colIdent, Distinct: true, Exprs: yyDollar[4].selectExprs}
 		}
 	case 489:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:2547
+//line sql.y:2550
 		{
 			yyVAL.expr = &FuncExpr{Name: yyDollar[1].colIdent, Distinct: true, Exprs: yyDollar[4].selectExprs}
 		}
 	case 490:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:2551
+//line sql.y:2554
 		{
 			yyVAL.expr = &FuncExpr{Qualifier: yyDollar[1].tableIdent, Name: yyDollar[3].colIdent, Exprs: yyDollar[5].selectExprs}
 		}
 	case 491:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2561
+//line sql.y:2564
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("left"), Exprs: yyDollar[3].selectExprs}
 		}
 	case 492:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2565
+//line sql.y:2568
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("right"), Exprs: yyDollar[3].selectExprs}
 		}
 	case 493:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:2569
+//line sql.y:2572
 		{
 			yyVAL.expr = &ConvertExpr{Expr: yyDollar[3].expr, Type: yyDollar[5].convertType}
 		}
 	case 494:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:2573
+//line sql.y:2576
 		{
 			yyVAL.expr = &ConvertExpr{Expr: yyDollar[3].expr, Type: yyDollar[5].convertType}
 		}
 	case 495:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:2577
+//line sql.y:2580
 		{
 			yyVAL.expr = &ConvertUsingExpr{Expr: yyDollar[3].expr, Type: yyDollar[5].str}
 		}
 	case 496:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:2581
+//line sql.y:2584
 		{
 			yyVAL.expr = &SubstrExpr{Name: yyDollar[3].colName, From: yyDollar[5].expr, To: yyDollar[7].expr}
 		}
 	case 497:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:2585
+//line sql.y:2588
 		{
 			yyVAL.expr = &SubstrExpr{Name: yyDollar[3].colName, From: yyDollar[5].expr, To: yyDollar[7].expr}
 		}
 	case 498:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:2589
+//line sql.y:2592
 		{
 			yyVAL.expr = &SubstrExpr{StrVal: NewStrVal(yyDollar[3].bytes), From: yyDollar[5].expr, To: yyDollar[7].expr}
 		}
 	case 499:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:2593
+//line sql.y:2596
 		{
 			yyVAL.expr = &SubstrExpr{StrVal: NewStrVal(yyDollar[3].bytes), From: yyDollar[5].expr, To: yyDollar[7].expr}
 		}
 	case 500:
 		yyDollar = yyS[yypt-9 : yypt+1]
-//line sql.y:2597
+//line sql.y:2600
 		{
 			yyVAL.expr = &MatchExpr{Columns: yyDollar[3].selectExprs, Expr: yyDollar[7].expr, Option: yyDollar[8].str}
 		}
 	case 501:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:2601
+//line sql.y:2604
 		{
 			yyVAL.expr = &GroupConcatExpr{Distinct: yyDollar[3].str, Exprs: yyDollar[4].selectExprs, OrderBy: yyDollar[5].orderBy, Separator: yyDollar[6].str, Limit: yyDollar[7].limit}
 		}
 	case 502:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:2605
+//line sql.y:2608
 		{
 			yyVAL.expr = &CaseExpr{Expr: yyDollar[2].expr, Whens: yyDollar[3].whens, Else: yyDollar[4].expr}
 		}
 	case 503:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2609
+//line sql.y:2612
 		{
 			yyVAL.expr = &ValuesFuncExpr{Name: yyDollar[3].colName}
 		}
 	case 504:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2619
+//line sql.y:2622
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("current_timestamp")}
 		}
 	case 505:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2623
+//line sql.y:2626
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("utc_timestamp")}
 		}
 	case 506:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2627
+//line sql.y:2630
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("utc_time")}
 		}
 	case 507:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2632
+//line sql.y:2635
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("utc_date")}
 		}
 	case 508:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2637
+//line sql.y:2640
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("localtime")}
 		}
 	case 509:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2642
+//line sql.y:2645
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("localtimestamp")}
 		}
 	case 510:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2648
+//line sql.y:2651
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("current_date")}
 		}
 	case 511:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2653
+//line sql.y:2656
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("current_time")}
 		}
 	case 512:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2658
+//line sql.y:2661
 		{
 			yyVAL.expr = &CurTimeFuncExpr{Name: NewColIdent("current_timestamp"), Fsp: yyDollar[2].expr}
 		}
 	case 513:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2662
+//line sql.y:2665
 		{
 			yyVAL.expr = &CurTimeFuncExpr{Name: NewColIdent("utc_timestamp"), Fsp: yyDollar[2].expr}
 		}
 	case 514:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2666
+//line sql.y:2669
 		{
 			yyVAL.expr = &CurTimeFuncExpr{Name: NewColIdent("utc_time"), Fsp: yyDollar[2].expr}
 		}
 	case 515:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2671
+//line sql.y:2674
 		{
 			yyVAL.expr = &CurTimeFuncExpr{Name: NewColIdent("localtime"), Fsp: yyDollar[2].expr}
 		}
 	case 516:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2676
+//line sql.y:2679
 		{
 			yyVAL.expr = &CurTimeFuncExpr{Name: NewColIdent("localtimestamp"), Fsp: yyDollar[2].expr}
 		}
 	case 517:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2681
+//line sql.y:2684
 		{
 			yyVAL.expr = &CurTimeFuncExpr{Name: NewColIdent("current_time"), Fsp: yyDollar[2].expr}
 		}
 	case 518:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:2685
+//line sql.y:2688
 		{
 			yyVAL.expr = &TimestampFuncExpr{Name: string("timestampadd"), Unit: yyDollar[3].colIdent.String(), Expr1: yyDollar[5].expr, Expr2: yyDollar[7].expr}
 		}
 	case 519:
 		yyDollar = yyS[yypt-8 : yypt+1]
-//line sql.y:2689
+//line sql.y:2692
 		{
 			yyVAL.expr = &TimestampFuncExpr{Name: string("timestampdiff"), Unit: yyDollar[3].colIdent.String(), Expr1: yyDollar[5].expr, Expr2: yyDollar[7].expr}
 		}
 	case 522:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2699
+//line sql.y:2702
 		{
 			yyVAL.expr = yyDollar[2].expr
 		}
 	case 523:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2709
+//line sql.y:2712
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("if"), Exprs: yyDollar[3].selectExprs}
 		}
 	case 524:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2713
+//line sql.y:2716
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("database"), Exprs: yyDollar[3].selectExprs}
 		}
 	case 525:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2717
+//line sql.y:2720
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("schema"), Exprs: yyDollar[3].selectExprs}
 		}
 	case 526:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2721
+//line sql.y:2724
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("mod"), Exprs: yyDollar[3].selectExprs}
 		}
 	case 527:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2725
+//line sql.y:2728
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("replace"), Exprs: yyDollar[3].selectExprs}
 		}
 	case 528:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2729
+//line sql.y:2732
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("substr"), Exprs: yyDollar[3].selectExprs}
 		}
 	case 529:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2733
+//line sql.y:2736
 		{
 			yyVAL.expr = &FuncExpr{Name: NewColIdent("substr"), Exprs: yyDollar[3].selectExprs}
 		}
 	case 530:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2739
+//line sql.y:2742
 		{
 			yyVAL.str = ""
 		}
 	case 531:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2743
+//line sql.y:2746
 		{
 			yyVAL.str = BooleanModeStr
 		}
 	case 532:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2747
+//line sql.y:2750
 		{
 			yyVAL.str = NaturalLanguageModeStr
 		}
 	case 533:
 		yyDollar = yyS[yypt-7 : yypt+1]
-//line sql.y:2751
+//line sql.y:2754
 		{
 			yyVAL.str = NaturalLanguageModeWithQueryExpansionStr
 		}
 	case 534:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2755
+//line sql.y:2758
 		{
 			yyVAL.str = QueryExpansionStr
 		}
 	case 535:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2761
+//line sql.y:2764
 		{
 			yyVAL.str = string(yyDollar[1].colIdent.String())
 		}
 	case 536:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2765
+//line sql.y:2768
 		{
 			yyVAL.str = string(yyDollar[1].bytes)
 		}
 	case 537:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2771
+//line sql.y:2774
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal}
 		}
 	case 538:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2775
+//line sql.y:2778
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal, Charset: yyDollar[3].str, Operator: CharacterSetStr}
 		}
 	case 539:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2779
+//line sql.y:2782
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal, Charset: string(yyDollar[3].colIdent.String())}
 		}
 	case 540:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2783
+//line sql.y:2786
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes)}
 		}
 	case 541:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2787
+//line sql.y:2790
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal}
 		}
 	case 542:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2791
+//line sql.y:2794
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes)}
 			yyVAL.convertType.Length = yyDollar[2].LengthScaleOption.Length
@@ -6735,169 +6731,169 @@ yydefault:
 		}
 	case 543:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2797
+//line sql.y:2800
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes)}
 		}
 	case 544:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2801
+//line sql.y:2804
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal}
 		}
 	case 545:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2805
+//line sql.y:2808
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes)}
 		}
 	case 546:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2809
+//line sql.y:2812
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes)}
 		}
 	case 547:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2813
+//line sql.y:2816
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes), Length: yyDollar[2].sqlVal}
 		}
 	case 548:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2817
+//line sql.y:2820
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes)}
 		}
 	case 549:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2821
+//line sql.y:2824
 		{
 			yyVAL.convertType = &ConvertType{Type: string(yyDollar[1].bytes)}
 		}
 	case 550:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2826
+//line sql.y:2829
 		{
 			yyVAL.expr = nil
 		}
 	case 551:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2830
+//line sql.y:2833
 		{
 			yyVAL.expr = yyDollar[1].expr
 		}
 	case 552:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2835
+//line sql.y:2838
 		{
 			yyVAL.str = string("")
 		}
 	case 553:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2839
+//line sql.y:2842
 		{
 			yyVAL.str = " separator '" + string(yyDollar[2].bytes) + "'"
 		}
 	case 554:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2845
+//line sql.y:2848
 		{
 			yyVAL.whens = []*When{yyDollar[1].when}
 		}
 	case 555:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2849
+//line sql.y:2852
 		{
 			yyVAL.whens = append(yyDollar[1].whens, yyDollar[2].when)
 		}
 	case 556:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:2855
+//line sql.y:2858
 		{
 			yyVAL.when = &When{Cond: yyDollar[2].expr, Val: yyDollar[4].expr}
 		}
 	case 557:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2860
+//line sql.y:2863
 		{
 			yyVAL.expr = nil
 		}
 	case 558:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2864
+//line sql.y:2867
 		{
 			yyVAL.expr = yyDollar[2].expr
 		}
 	case 559:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2870
+//line sql.y:2873
 		{
 			yyVAL.colName = &ColName{Name: yyDollar[1].colIdent}
 		}
 	case 560:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2874
+//line sql.y:2877
 		{
 			yyVAL.colName = &ColName{Qualifier: TableName{Name: yyDollar[1].tableIdent}, Name: yyDollar[3].colIdent}
 		}
 	case 561:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:2878
+//line sql.y:2881
 		{
 			yyVAL.colName = &ColName{Qualifier: TableName{Qualifier: yyDollar[1].tableIdent, Name: yyDollar[3].tableIdent}, Name: yyDollar[5].colIdent}
 		}
 	case 562:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2884
+//line sql.y:2887
 		{
 			yyVAL.expr = NewStrVal(yyDollar[1].bytes)
 		}
 	case 563:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2888
+//line sql.y:2891
 		{
 			yyVAL.expr = NewHexVal(yyDollar[1].bytes)
 		}
 	case 564:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2892
+//line sql.y:2895
 		{
 			yyVAL.expr = NewBitVal(yyDollar[1].bytes)
 		}
 	case 565:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2896
+//line sql.y:2899
 		{
 			yyVAL.expr = NewIntVal(yyDollar[1].bytes)
 		}
 	case 566:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2900
+//line sql.y:2903
 		{
 			yyVAL.expr = NewFloatVal(yyDollar[1].bytes)
 		}
 	case 567:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2904
+//line sql.y:2907
 		{
 			yyVAL.expr = NewHexNum(yyDollar[1].bytes)
 		}
 	case 568:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2908
+//line sql.y:2911
 		{
 			yyVAL.expr = NewValArg(yyDollar[1].bytes)
 		}
 	case 569:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2912
+//line sql.y:2915
 		{
 			yyVAL.expr = &NullVal{}
 		}
 	case 570:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2918
+//line sql.y:2921
 		{
 			// TODO(sougou): Deprecate this construct.
 			if yyDollar[1].colIdent.Lowered() != "value" {
@@ -6908,237 +6904,237 @@ yydefault:
 		}
 	case 571:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2927
+//line sql.y:2930
 		{
 			yyVAL.expr = NewIntVal(yyDollar[1].bytes)
 		}
 	case 572:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2931
+//line sql.y:2934
 		{
 			yyVAL.expr = NewValArg(yyDollar[1].bytes)
 		}
 	case 573:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2936
+//line sql.y:2939
 		{
 			yyVAL.exprs = nil
 		}
 	case 574:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2940
+//line sql.y:2943
 		{
 			yyVAL.exprs = yyDollar[3].exprs
 		}
 	case 575:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2945
+//line sql.y:2948
 		{
 			yyVAL.expr = nil
 		}
 	case 576:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2949
+//line sql.y:2952
 		{
 			yyVAL.expr = yyDollar[2].expr
 		}
 	case 577:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2954
+//line sql.y:2957
 		{
 			yyVAL.orderBy = nil
 		}
 	case 578:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2958
+//line sql.y:2961
 		{
 			yyVAL.orderBy = yyDollar[3].orderBy
 		}
 	case 579:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2964
+//line sql.y:2967
 		{
 			yyVAL.orderBy = OrderBy{yyDollar[1].order}
 		}
 	case 580:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:2968
+//line sql.y:2971
 		{
 			yyVAL.orderBy = append(yyDollar[1].orderBy, yyDollar[3].order)
 		}
 	case 581:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2974
+//line sql.y:2977
 		{
 			yyVAL.order = &Order{Expr: yyDollar[1].expr, Direction: yyDollar[2].str}
 		}
 	case 582:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2979
+//line sql.y:2982
 		{
 			yyVAL.str = AscScr
 		}
 	case 583:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2983
+//line sql.y:2986
 		{
 			yyVAL.str = AscScr
 		}
 	case 584:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:2987
+//line sql.y:2990
 		{
 			yyVAL.str = DescScr
 		}
 	case 585:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:2992
+//line sql.y:2995
 		{
 			yyVAL.limit = nil
 		}
 	case 586:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:2996
+//line sql.y:2999
 		{
 			yyVAL.limit = &Limit{Rowcount: yyDollar[2].expr}
 		}
 	case 587:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:3000
+//line sql.y:3003
 		{
 			yyVAL.limit = &Limit{Offset: yyDollar[2].expr, Rowcount: yyDollar[4].expr}
 		}
 	case 588:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:3004
+//line sql.y:3007
 		{
 			yyVAL.limit = &Limit{Offset: yyDollar[4].expr, Rowcount: yyDollar[2].expr}
 		}
 	case 589:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:3009
+//line sql.y:3012
 		{
 			yyVAL.str = ""
 		}
 	case 590:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:3013
+//line sql.y:3016
 		{
 			yyVAL.str = ForUpdateStr
 		}
 	case 591:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:3017
+//line sql.y:3020
 		{
 			yyVAL.str = ShareModeStr
 		}
 	case 592:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:3030
+//line sql.y:3033
 		{
 			yyVAL.ins = &Insert{Rows: yyDollar[2].values}
 		}
 	case 593:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3034
+//line sql.y:3037
 		{
 			yyVAL.ins = &Insert{Rows: yyDollar[1].selStmt}
 		}
 	case 594:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3038
+//line sql.y:3041
 		{
 			// Drop the redundant parenthesis.
 			yyVAL.ins = &Insert{Rows: yyDollar[2].selStmt}
 		}
 	case 595:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:3043
+//line sql.y:3046
 		{
 			yyVAL.ins = &Insert{Columns: yyDollar[2].columns, Rows: yyDollar[5].values}
 		}
 	case 596:
 		yyDollar = yyS[yypt-4 : yypt+1]
-//line sql.y:3047
+//line sql.y:3050
 		{
 			yyVAL.ins = &Insert{Columns: yyDollar[2].columns, Rows: yyDollar[4].selStmt}
 		}
 	case 597:
 		yyDollar = yyS[yypt-6 : yypt+1]
-//line sql.y:3051
+//line sql.y:3054
 		{
 			// Drop the redundant parenthesis.
 			yyVAL.ins = &Insert{Columns: yyDollar[2].columns, Rows: yyDollar[5].selStmt}
 		}
 	case 598:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3058
+//line sql.y:3061
 		{
 			yyVAL.columns = Columns{yyDollar[1].colIdent}
 		}
 	case 599:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3062
+//line sql.y:3065
 		{
 			yyVAL.columns = Columns{yyDollar[3].colIdent}
 		}
 	case 600:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3066
+//line sql.y:3069
 		{
 			yyVAL.columns = append(yyVAL.columns, yyDollar[3].colIdent)
 		}
 	case 601:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:3070
+//line sql.y:3073
 		{
 			yyVAL.columns = append(yyVAL.columns, yyDollar[5].colIdent)
 		}
 	case 602:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:3075
+//line sql.y:3078
 		{
 			yyVAL.updateExprs = nil
 		}
 	case 603:
 		yyDollar = yyS[yypt-5 : yypt+1]
-//line sql.y:3079
+//line sql.y:3082
 		{
 			yyVAL.updateExprs = yyDollar[5].updateExprs
 		}
 	case 604:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3085
+//line sql.y:3088
 		{
 			yyVAL.values = Values{yyDollar[1].valTuple}
 		}
 	case 605:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3089
+//line sql.y:3092
 		{
 			yyVAL.values = append(yyDollar[1].values, yyDollar[3].valTuple)
 		}
 	case 606:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3095
+//line sql.y:3098
 		{
 			yyVAL.valTuple = yyDollar[1].valTuple
 		}
 	case 607:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:3099
+//line sql.y:3102
 		{
 			yyVAL.valTuple = ValTuple{}
 		}
 	case 608:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3105
+//line sql.y:3108
 		{
 			yyVAL.valTuple = ValTuple(yyDollar[2].exprs)
 		}
 	case 609:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3111
+//line sql.y:3114
 		{
 			if len(yyDollar[1].valTuple) == 1 {
 				yyVAL.expr = yyDollar[1].valTuple[0]
@@ -7148,310 +7144,317 @@ yydefault:
 		}
 	case 610:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3121
+//line sql.y:3124
 		{
 			yyVAL.updateExprs = UpdateExprs{yyDollar[1].updateExpr}
 		}
 	case 611:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3125
+//line sql.y:3128
 		{
 			yyVAL.updateExprs = append(yyDollar[1].updateExprs, yyDollar[3].updateExpr)
 		}
 	case 612:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3131
+//line sql.y:3134
 		{
 			yyVAL.updateExpr = &UpdateExpr{Name: yyDollar[1].colName, Expr: yyDollar[3].expr}
 		}
 	case 613:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3137
+//line sql.y:3140
 		{
 			yyVAL.setExprs = SetExprs{yyDollar[1].setExpr}
 		}
 	case 614:
+		yyDollar = yyS[yypt-2 : yypt+1]
+//line sql.y:3144
+		{
+			yyDollar[2].setExpr.Scope = yyDollar[1].str
+			yyVAL.setExprs = SetExprs{yyDollar[2].setExpr}
+		}
+	case 615:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3141
+//line sql.y:3149
 		{
 			yyVAL.setExprs = append(yyDollar[1].setExprs, yyDollar[3].setExpr)
 		}
-	case 615:
+	case 616:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3147
+//line sql.y:3155
 		{
 			yyVAL.setExpr = &SetExpr{Name: yyDollar[1].colIdent, Expr: NewStrVal([]byte("on"))}
 		}
-	case 616:
+	case 617:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3151
+//line sql.y:3159
 		{
 			yyVAL.setExpr = &SetExpr{Name: yyDollar[1].colIdent, Expr: NewStrVal([]byte("off"))}
 		}
-	case 617:
+	case 618:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3155
+//line sql.y:3163
 		{
 			yyVAL.setExpr = &SetExpr{Name: yyDollar[1].colIdent, Expr: yyDollar[3].expr}
 		}
-	case 618:
+	case 619:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3159
+//line sql.y:3167
 		{
 			yyVAL.setExpr = &SetExpr{Name: NewColIdent(string(yyDollar[1].bytes)), Expr: yyDollar[2].expr}
 		}
-	case 620:
+	case 621:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:3166
+//line sql.y:3174
 		{
 			yyVAL.bytes = []byte("charset")
 		}
-	case 622:
+	case 623:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3173
+//line sql.y:3181
 		{
 			yyVAL.expr = NewStrVal([]byte(yyDollar[1].colIdent.String()))
 		}
-	case 623:
+	case 624:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3177
+//line sql.y:3185
 		{
 			yyVAL.expr = NewStrVal(yyDollar[1].bytes)
 		}
-	case 624:
+	case 625:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3181
+//line sql.y:3189
 		{
 			yyVAL.expr = &Default{}
 		}
-	case 627:
+	case 628:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:3190
+//line sql.y:3198
 		{
 			yyVAL.byt = 0
 		}
-	case 628:
+	case 629:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:3192
+//line sql.y:3200
 		{
 			yyVAL.byt = 1
 		}
-	case 629:
+	case 630:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:3195
+//line sql.y:3203
 		{
 			yyVAL.empty = struct{}{}
 		}
-	case 630:
+	case 631:
 		yyDollar = yyS[yypt-3 : yypt+1]
-//line sql.y:3197
+//line sql.y:3205
 		{
 			yyVAL.empty = struct{}{}
 		}
-	case 631:
+	case 632:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:3200
+//line sql.y:3208
 		{
 			yyVAL.str = ""
 		}
-	case 632:
-		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3202
-		{
-			yyVAL.str = IgnoreStr
-		}
 	case 633:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3206
+//line sql.y:3210
 		{
-			yyVAL.empty = struct{}{}
+			yyVAL.str = IgnoreStr
 		}
 	case 634:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3208
+//line sql.y:3214
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 635:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3210
+//line sql.y:3216
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 636:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3212
+//line sql.y:3218
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 637:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3214
+//line sql.y:3220
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 638:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3216
+//line sql.y:3222
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 639:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3218
+//line sql.y:3224
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 640:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3220
+//line sql.y:3226
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 641:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3222
+//line sql.y:3228
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 642:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3224
+//line sql.y:3230
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 643:
-		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:3227
+		yyDollar = yyS[yypt-1 : yypt+1]
+//line sql.y:3232
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 644:
-		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3229
+		yyDollar = yyS[yypt-0 : yypt+1]
+//line sql.y:3235
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 645:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3231
+//line sql.y:3237
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 646:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3235
+//line sql.y:3239
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 647:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3237
+//line sql.y:3243
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 648:
-		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:3240
+		yyDollar = yyS[yypt-1 : yypt+1]
+//line sql.y:3245
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 649:
-		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3242
+		yyDollar = yyS[yypt-0 : yypt+1]
+//line sql.y:3248
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 650:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3244
+//line sql.y:3250
 		{
 			yyVAL.empty = struct{}{}
 		}
 	case 651:
+		yyDollar = yyS[yypt-1 : yypt+1]
+//line sql.y:3252
+		{
+			yyVAL.empty = struct{}{}
+		}
+	case 652:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:3247
+//line sql.y:3255
 		{
 			yyVAL.colIdent = ColIdent{}
 		}
-	case 652:
+	case 653:
 		yyDollar = yyS[yypt-2 : yypt+1]
-//line sql.y:3249
+//line sql.y:3257
 		{
 			yyVAL.colIdent = yyDollar[2].colIdent
 		}
-	case 653:
+	case 654:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3253
+//line sql.y:3261
 		{
 			yyVAL.colIdent = yyDollar[1].colIdent
 		}
-	case 654:
+	case 655:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3257
+//line sql.y:3265
 		{
 			yyVAL.colIdent = NewColIdent(string(yyDollar[1].bytes))
 		}
-	case 656:
+	case 657:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3264
+//line sql.y:3272
 		{
 			yyVAL.colIdent = NewColIdent(string(yyDollar[1].bytes))
 		}
-	case 657:
+	case 658:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3270
+//line sql.y:3278
 		{
 			yyVAL.tableIdent = NewTableIdent(string(yyDollar[1].colIdent.String()))
 		}
-	case 658:
+	case 659:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3274
+//line sql.y:3282
 		{
 			yyVAL.tableIdent = NewTableIdent(string(yyDollar[1].bytes))
 		}
-	case 660:
+	case 661:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3281
+//line sql.y:3289
 		{
 			yyVAL.tableIdent = NewTableIdent(string(yyDollar[1].bytes))
 		}
-	case 950:
+	case 951:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3596
+//line sql.y:3604
 		{
 			if incNesting(yylex) {
 				yylex.Error("max nesting level reached")
 				return 1
 			}
 		}
-	case 951:
+	case 952:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3605
+//line sql.y:3613
 		{
 			decNesting(yylex)
 		}
-	case 952:
+	case 953:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:3610
+//line sql.y:3618
 		{
 			skipToEnd(yylex)
 		}
-	case 953:
+	case 954:
 		yyDollar = yyS[yypt-0 : yypt+1]
-//line sql.y:3615
+//line sql.y:3623
 		{
 			skipToEnd(yylex)
 		}
-	case 954:
+	case 955:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3619
+//line sql.y:3627
 		{
 			skipToEnd(yylex)
 		}
-	case 955:
+	case 956:
 		yyDollar = yyS[yypt-1 : yypt+1]
-//line sql.y:3623
+//line sql.y:3631
 		{
 			skipToEnd(yylex)
 		}
diff --git a/go/vt/sqlparser/sql.y b/go/vt/sqlparser/sql.y
index 77f8742635b..0d47d334911 100644
--- a/go/vt/sqlparser/sql.y
+++ b/go/vt/sqlparser/sql.y
@@ -89,6 +89,8 @@ func skipToEnd(yylex interface{}) {
   setExprs      SetExprs
   updateExpr    *UpdateExpr
   setExpr       *SetExpr
+  characteristic Characteristic
+  characteristics []Characteristic
   colIdent      ColIdent
   tableIdent    TableIdent
   convertType   *ConvertType
@@ -213,7 +215,7 @@ func skipToEnd(yylex interface{}) {
 
 %type <statement> command
 %type <selStmt> select_statement base_select union_lhs union_rhs
-%type <statement> stream_statement insert_statement update_statement delete_statement set_statement
+%type <statement> stream_statement insert_statement update_statement delete_statement set_statement set_transaction_statement
 %type <statement> create_statement alter_statement rename_statement drop_statement truncate_statement flush_statement
 %type <ddl> create_table_prefix rename_list
 %type <statement> analyze_statement show_statement use_statement other_statement
@@ -262,10 +264,12 @@ func skipToEnd(yylex interface{}) {
 %type <partitions> opt_partition_clause partition_list
 %type <updateExprs> on_dup_opt
 %type <updateExprs> update_list
-%type <setExprs> set_list transaction_chars
+%type <setExprs> set_list
 %type <bytes> charset_or_character_set
 %type <updateExpr> update_expression
-%type <setExpr> set_expression transaction_char
+%type <setExpr> set_expression
+%type <characteristic> transaction_char
+%type <characteristics> transaction_chars
 %type <str> isolation_level
 %type <bytes> for_from
 %type <str> ignore_opt default_opt
@@ -340,6 +344,7 @@ command:
 | update_statement
 | delete_statement
 | set_statement
+| set_transaction_statement
 | create_statement
 | alter_statement
 | rename_statement
@@ -520,23 +525,21 @@ set_statement:
   {
     $$ = &Set{Comments: Comments($2), Exprs: $3}
   }
-| SET comment_opt set_session_or_global set_list
-  {
-    $$ = &Set{Comments: Comments($2), Scope: $3, Exprs: $4}
-  }
-| SET comment_opt set_session_or_global TRANSACTION transaction_chars
+
+set_transaction_statement:
+  SET comment_opt set_session_or_global TRANSACTION transaction_chars
   {
-    $$ = &Set{Comments: Comments($2), Scope: $3, Exprs: $5}
+    $$ = &SetTransaction{Comments: Comments($2), Scope: $3, Characteristics: $5}
   }
 | SET comment_opt TRANSACTION transaction_chars
   {
-    $$ = &Set{Comments: Comments($2), Exprs: $4}
+    $$ = &SetTransaction{Comments: Comments($2), Characteristics: $4}
   }
 
 transaction_chars:
   transaction_char
   {
-    $$ = SetExprs{$1}
+    $$ = []Characteristic{$1}
   }
 | transaction_chars ',' transaction_char
   {
@@ -546,33 +549,33 @@ transaction_chars:
 transaction_char:
   ISOLATION LEVEL isolation_level
   {
-    $$ = &SetExpr{Name: NewColIdent(TransactionStr), Expr: NewStrVal([]byte($3))}
+    $$ = &IsolationLevel{Level: string($3)}
   }
 | READ WRITE
   {
-    $$ = &SetExpr{Name: NewColIdent(TransactionStr), Expr: NewStrVal([]byte(TxReadWrite))}
+    $$ = &AccessMode{Mode: TxReadWrite}
   }
 | READ ONLY
   {
-    $$ = &SetExpr{Name: NewColIdent(TransactionStr), Expr: NewStrVal([]byte(TxReadOnly))}
+    $$ = &AccessMode{Mode: TxReadOnly}
   }
 
 isolation_level:
   REPEATABLE READ
   {
-    $$ = IsolationLevelRepeatableRead
+    $$ = RepeatableRead
   }
 | READ COMMITTED
   {
-    $$ = IsolationLevelReadCommitted
+    $$ = ReadCommitted
   }
 | READ UNCOMMITTED
   {
-    $$ = IsolationLevelReadUncommitted
+    $$ = ReadUncommitted
   }
 | SERIALIZABLE
   {
-    $$ = IsolationLevelSerializable
+    $$ = Serializable
   }
 
 set_session_or_global:
@@ -3137,6 +3140,11 @@ set_list:
   {
     $$ = SetExprs{$1}
   }
+|  set_session_or_global set_expression
+  {
+    $2.Scope = $1
+    $$ = SetExprs{$2}
+  }
 | set_list ',' set_expression
   {
     $$ = append($1, $3)
diff --git a/go/vt/vtgate/executor.go b/go/vt/vtgate/executor.go
index 2b7fc6c85b9..6b74c39d77b 100644
--- a/go/vt/vtgate/executor.go
+++ b/go/vt/vtgate/executor.go
@@ -24,10 +24,14 @@ import (
 	"net/http"
 	"regexp"
 	"sort"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
 
+	"vitess.io/vitess/go/vt/log"
+	vtgatepb "vitess.io/vitess/go/vt/proto/vtgate"
+
 	"golang.org/x/net/context"
 	"vitess.io/vitess/go/trace"
 
@@ -38,7 +42,6 @@ import (
 	"vitess.io/vitess/go/stats"
 	"vitess.io/vitess/go/vt/callerid"
 	"vitess.io/vitess/go/vt/key"
-	"vitess.io/vitess/go/vt/log"
 	"vitess.io/vitess/go/vt/sqlparser"
 	"vitess.io/vitess/go/vt/srvtopo"
 	"vitess.io/vitess/go/vt/topo/topoproto"
@@ -50,7 +53,6 @@ import (
 
 	querypb "vitess.io/vitess/go/vt/proto/query"
 	topodatapb "vitess.io/vitess/go/vt/proto/topodata"
-	vtgatepb "vitess.io/vitess/go/vt/proto/vtgate"
 	vtrpcpb "vitess.io/vitess/go/vt/proto/vtrpc"
 )
 
@@ -294,226 +296,279 @@ func (e *Executor) handleRollback(ctx context.Context, safeSession *SafeSession,
 }
 
 func (e *Executor) handleSet(ctx context.Context, safeSession *SafeSession, sql string, logStats *LogStats) (*sqltypes.Result, error) {
-	vals, scope, err := sqlparser.ExtractSetValues(sql)
+	stmt, err := sqlparser.Parse(sql)
+	if err != nil {
+		return nil, err
+	}
+	rewrittenAST, err := sqlparser.PrepareAST(stmt, nil, "vtg", false)
+	if err != nil {
+		return nil, err
+	}
+	set, ok := rewrittenAST.AST.(*sqlparser.Set)
+	if !ok {
+		_, ok := rewrittenAST.AST.(*sqlparser.SetTransaction)
+		if !ok {
+			return nil, vterrors.New(vtrpcpb.Code_INTERNAL, "unexpected statement type")
+		}
+		// Parser ensures set transaction is well-formed.
+
+		// TODO: This is a NOP, modeled off of tx_isolation and tx_read_only.  It's incredibly
+		// dangerous that it's a NOP, but fixing that is left to.
+		return &sqltypes.Result{}, nil
+	}
+
 	execStart := time.Now()
 	logStats.PlanTime = execStart.Sub(logStats.StartTime)
 	defer func() {
 		logStats.ExecuteTime = time.Since(execStart)
 	}()
 
-	if err != nil {
-		return &sqltypes.Result{}, vterrors.New(vtrpcpb.Code_INVALID_ARGUMENT, err.Error())
-	}
+	for _, expr := range set.Exprs {
+		// This is what correctly allows us to handle queries such as "set @@session.`autocommit`=1"
+		// it will remove backticks and double quotes that might surround the part after the first period
+		_, out := sqlparser.NewStringTokenizer(expr.Name.Lowered()).Scan()
+		name := string(out)
+		switch expr.Scope {
+		case sqlparser.GlobalStr:
+			return nil, vterrors.New(vtrpcpb.Code_INVALID_ARGUMENT, "unsupported in set: global")
+		case sqlparser.SessionStr:
+			value, err := getValueFor(expr)
+			if err != nil {
+				return nil, err
+			}
+			return &sqltypes.Result{}, handleSessionSetting(ctx, name, safeSession, value, e.txConn, sql)
+		case sqlparser.VitessMetadataStr:
+			value, err := getValueFor(expr)
+			if err != nil {
+				return nil, err
+			}
+			val, ok := value.(string)
+			if !ok {
+				return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for charset: %v", value)
+			}
+			return e.handleSetVitessMetadata(ctx, name, val)
+		case "": // we should only get here with UDVs
+			return nil, vterrors.Errorf(vtrpcpb.Code_INTERNAL, "should have been handled by planning")
 
-	if scope == sqlparser.GlobalStr {
-		return &sqltypes.Result{}, vterrors.New(vtrpcpb.Code_INVALID_ARGUMENT, "unsupported in set: global")
+		}
 	}
 
-	for k, v := range vals {
-		switch k.Scope {
-		case sqlparser.GlobalStr:
-			return &sqltypes.Result{}, vterrors.New(vtrpcpb.Code_INVALID_ARGUMENT, "unsupported in set: global")
-		case sqlparser.VitessMetadataStr:
-			return e.handleSetVitessMetadata(ctx, k, v)
-		case sqlparser.VariableStr:
-			err := handleSetUserDefinedVariables(safeSession, k, v)
+	return &sqltypes.Result{}, nil
+}
+
+func getValueFor(expr *sqlparser.SetExpr) (interface{}, error) {
+	switch expr := expr.Expr.(type) {
+	case *sqlparser.SQLVal:
+		switch expr.Type {
+		case sqlparser.StrVal:
+			return strings.ToLower(string(expr.Val)), nil
+		case sqlparser.IntVal:
+			num, err := strconv.ParseInt(string(expr.Val), 0, 64)
 			if err != nil {
 				return nil, err
 			}
-		case sqlparser.ImplicitStr:
-			switch k.Key {
-			case "autocommit":
-				val, err := validateSetOnOff(v, k.Key)
-				if err != nil {
-					return nil, err
-				}
+			return num, nil
+		case sqlparser.FloatVal:
+			num, err := strconv.ParseFloat(string(expr.Val), 64)
+			if err != nil {
+				return nil, err
+			}
+			return num, nil
+		default:
+			return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "invalid value type: %v", sqlparser.String(expr))
+		}
+	case sqlparser.BoolVal:
+		var val int64
+		if expr {
+			val = 1
+		}
+		return val, nil
+	case *sqlparser.NullVal:
+		return nil, nil
+	case *sqlparser.ColName:
+		return expr.Name.String(), nil
+	case *sqlparser.Default:
+		return "default", nil
+	default:
+		return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "invalid syntax: %s", sqlparser.String(expr))
+	}
 
-				switch val {
-				case 0:
-					safeSession.Autocommit = false
-				case 1:
-					if safeSession.InTransaction() {
-						if err := e.txConn.Commit(ctx, safeSession); err != nil {
-							return nil, err
-						}
-					}
-					safeSession.Autocommit = true
-				default:
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for autocommit: %d", val)
-				}
-			case "client_found_rows":
-				val, ok := v.(int64)
-				if !ok {
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for client_found_rows: %T", v)
-				}
-				if safeSession.Options == nil {
-					safeSession.Options = &querypb.ExecuteOptions{}
-				}
-				switch val {
-				case 0:
-					safeSession.Options.ClientFoundRows = false
-				case 1:
-					safeSession.Options.ClientFoundRows = true
-				default:
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for client_found_rows: %d", val)
-				}
-			case "skip_query_plan_cache":
-				val, ok := v.(int64)
-				if !ok {
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for skip_query_plan_cache: %T", v)
-				}
-				if safeSession.Options == nil {
-					safeSession.Options = &querypb.ExecuteOptions{}
-				}
-				switch val {
-				case 0:
-					safeSession.Options.SkipQueryPlanCache = false
-				case 1:
-					safeSession.Options.SkipQueryPlanCache = true
-				default:
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for skip_query_plan_cache: %d", val)
-				}
-			case "sql_safe_updates":
-				val, err := validateSetOnOff(v, k.Key)
-				if err != nil {
-					return nil, err
-				}
+}
 
-				switch val {
-				case 0, 1:
-					// no op
-				default:
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for sql_safe_updates: %d", val)
-				}
-			case "transaction_mode":
-				val, ok := v.(string)
-				if !ok {
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for transaction_mode: %T", v)
-				}
-				out, ok := vtgatepb.TransactionMode_value[strings.ToUpper(val)]
-				if !ok {
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "invalid transaction_mode: %s", val)
-				}
-				safeSession.TransactionMode = vtgatepb.TransactionMode(out)
-			case sqlparser.TransactionStr:
-				// Parser ensures it's well-formed.
-
-				// TODO: This is a NOP, modeled off of tx_isolation and tx_read_only.  It's incredibly
-				// dangerous that it's a NOP, but fixing that is left to. Note that vtqueryservice needs
-				// to be updated as well:
-				// https://github.com/vitessio/vitess/issues/4127
-			case "tx_isolation":
-				val, ok := v.(string)
-				if !ok {
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for tx_isolation: %T", v)
-				}
-				switch val {
-				case "repeatable read", "read committed", "read uncommitted", "serializable":
-					// TODO (4127): This is a dangerous NOP.
-				default:
-					return nil, fmt.Errorf("unexpected value for tx_isolation: %v", val)
-				}
-			case "tx_read_only", "transaction_read_only":
-				val, err := validateSetOnOff(v, k.Key)
-				if err != nil {
-					return nil, err
-				}
-				switch val {
-				case 0, 1:
-					// TODO (4127): This is a dangerous NOP.
-				default:
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for %v: %d", k.Key, val)
-				}
-			case "workload":
-				val, ok := v.(string)
-				if !ok {
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for workload: %T", v)
-				}
-				out, ok := querypb.ExecuteOptions_Workload_value[strings.ToUpper(val)]
-				if !ok {
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "invalid workload: %s", val)
-				}
-				if safeSession.Options == nil {
-					safeSession.Options = &querypb.ExecuteOptions{}
-				}
-				safeSession.Options.Workload = querypb.ExecuteOptions_Workload(out)
-			case "sql_select_limit":
-				var val int64
-
-				switch cast := v.(type) {
-				case int64:
-					val = cast
-				case string:
-					if !strings.EqualFold(cast, "default") {
-						return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected string value for sql_select_limit: %v", v)
-					}
-				default:
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for sql_select_limit: %T", v)
-				}
+func handleSessionSetting(ctx context.Context, name string, session *SafeSession, value interface{}, conn *TxConn, sql string) error {
+	switch name {
+	case "autocommit":
+		val, err := validateSetOnOff(value, name)
+		if err != nil {
+			return err
+		}
 
-				if safeSession.Options == nil {
-					safeSession.Options = &querypb.ExecuteOptions{}
-				}
-				safeSession.Options.SqlSelectLimit = val
-			case "sql_auto_is_null":
-				val, ok := v.(int64)
-				if !ok {
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for sql_auto_is_null: %T", v)
-				}
-				switch val {
-				case 0:
-					// This is the default setting for MySQL. Do nothing.
-				case 1:
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "sql_auto_is_null is not currently supported")
-				default:
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for sql_auto_is_null: %d", val)
-				}
-			case "character_set_results":
-				// This is a statement that mysql-connector-j sends at the beginning. We return a canned response for it.
-				switch v {
-				case nil, "utf8", "utf8mb4", "latin1":
-				default:
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "disallowed value for character_set_results: %v", v)
-				}
-			case "wait_timeout":
-				_, ok := v.(int64)
-				if !ok {
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for wait_timeout: %T", v)
-				}
-			case "sql_mode", "net_write_timeout", "net_read_timeout", "lc_messages", "collation_connection", "foreign_key_checks", "sql_quote_show_create", "unique_checks":
-				log.Warningf("Ignored inapplicable SET %v = %v", k, v)
-				warnings.Add("IgnoredSet", 1)
-			case "charset", "names":
-				val, ok := v.(string)
-				if !ok {
-					return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for charset/names: %T", v)
-				}
-				switch val {
-				case "", "utf8", "utf8mb4", "latin1", "default":
-					break
-				default:
-					return nil, fmt.Errorf("unexpected value for charset/names: %v", val)
+		switch val {
+		case 0:
+			session.Autocommit = false
+		case 1:
+			if session.InTransaction() {
+				if err := conn.Commit(ctx, session); err != nil {
+					return err
 				}
-			default:
-				return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unsupported construct: %s", sql)
 			}
-
+			session.Autocommit = true
+		default:
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for autocommit: %d", val)
+		}
+	case "client_found_rows":
+		val, ok := value.(int64)
+		if !ok {
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for client_found_rows: %T", value)
+		}
+		if session.Options == nil {
+			session.Options = &querypb.ExecuteOptions{}
+		}
+		switch val {
+		case 0:
+			session.Options.ClientFoundRows = false
+		case 1:
+			session.Options.ClientFoundRows = true
+		default:
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for client_found_rows: %d", val)
+		}
+	case "skip_query_plan_cache":
+		val, ok := value.(int64)
+		if !ok {
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for skip_query_plan_cache: %T", value)
+		}
+		if session.Options == nil {
+			session.Options = &querypb.ExecuteOptions{}
+		}
+		switch val {
+		case 0:
+			session.Options.SkipQueryPlanCache = false
+		case 1:
+			session.Options.SkipQueryPlanCache = true
+		default:
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for skip_query_plan_cache: %d", val)
+		}
+	case "sql_safe_updates":
+		val, err := validateSetOnOff(value, name)
+		if err != nil {
+			return err
 		}
 
-	}
-	return &sqltypes.Result{}, nil
-}
+		switch val {
+		case 0, 1:
+			// no op
+		default:
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for sql_safe_updates: %d", val)
+		}
+	case "transaction_mode":
+		val, ok := value.(string)
+		if !ok {
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for transaction_mode: %T", value)
+		}
+		out, ok := vtgatepb.TransactionMode_value[strings.ToUpper(val)]
+		if !ok {
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "invalid transaction_mode: %s", val)
+		}
+		session.TransactionMode = vtgatepb.TransactionMode(out)
+	case "tx_isolation": // TODO move this to set tx
+		val, ok := value.(string)
+		if !ok {
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for tx_isolation: %T", value)
+		}
+		switch val {
+		case "repeatable read", "read committed", "read uncommitted", "serializable":
+			// TODO (4127): This is a dangerous NOP.
+		default:
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for tx_isolation: %v", val)
+		}
+	case "tx_read_only", "transaction_read_only": // TODO move this to set tx
+		val, err := validateSetOnOff(value, name)
+		if err != nil {
+			return err
+		}
+		switch val {
+		case 0, 1:
+			// TODO (4127): This is a dangerous NOP.
+		default:
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for %v: %d", name, val)
+		}
+	case "workload":
+		val, ok := value.(string)
+		if !ok {
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for workload: %T", value)
+		}
+		out, ok := querypb.ExecuteOptions_Workload_value[strings.ToUpper(val)]
+		if !ok {
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "invalid workload: %s", val)
+		}
+		if session.Options == nil {
+			session.Options = &querypb.ExecuteOptions{}
+		}
+		session.Options.Workload = querypb.ExecuteOptions_Workload(out)
+	case "sql_select_limit":
+		var val int64
+
+		switch cast := value.(type) {
+		case int64:
+			val = cast
+		case string:
+			if !strings.EqualFold(cast, "default") {
+				return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected string value for sql_select_limit: %v", value)
+			}
+		default:
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for sql_select_limit: %T", value)
+		}
 
-func handleSetUserDefinedVariables(session *SafeSession, k sqlparser.SetKey, v interface{}) error {
-	variable, err := sqltypes.BuildBindVariable(v)
-	if err != nil {
-		return err
+		if session.Options == nil {
+			session.Options = &querypb.ExecuteOptions{}
+		}
+		session.Options.SqlSelectLimit = val
+	case "sql_auto_is_null":
+		val, ok := value.(int64)
+		if !ok {
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for sql_auto_is_null: %T", value)
+		}
+		switch val {
+		case 0:
+			// This is the default setting for MySQL. Do nothing.
+		case 1:
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "sql_auto_is_null is not currently supported")
+		default:
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for sql_auto_is_null: %d", val)
+		}
+	case "character_set_results":
+		// This is a statement that mysql-connector-j sends at the beginning. We return a canned response for it.
+		switch value {
+		case nil, "utf8", "utf8mb4", "latin1":
+		default:
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "disallowed value for character_set_results: %v", value)
+		}
+	case "wait_timeout":
+		_, ok := value.(int64)
+		if !ok {
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for wait_timeout: %T", value)
+		}
+	case "sql_mode", "net_write_timeout", "net_read_timeout", "lc_messages", "collation_connection", "foreign_key_checks", "sql_quote_show_create", "unique_checks":
+		log.Warningf("Ignored inapplicable SET %v = %v", name, value)
+		warnings.Add("IgnoredSet", 1)
+	case "charset", "names":
+		val, ok := value.(string)
+		if !ok {
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for charset/names: %T", value)
+		}
+		switch val {
+		case "", "utf8", "utf8mb4", "latin1", "default":
+			break
+		default:
+			return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value for charset/names: %v", val)
+		}
+	default:
+		return vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unsupported construct: %s", sql)
 	}
-	session.SetUserDefinedVariable(k.Key, variable)
 	return nil
 }
 
-func (e *Executor) handleSetVitessMetadata(ctx context.Context, k sqlparser.SetKey, v interface{}) (*sqltypes.Result, error) {
+func (e *Executor) handleSetVitessMetadata(ctx context.Context, name, value string) (*sqltypes.Result, error) {
 	//TODO(kalfonso): move to its own acl check and consolidate into an acl component that can handle multiple operations (vschema, metadata)
 	allowed := vschemaacl.Authorized(callerid.ImmediateCallerIDFromContext(ctx))
 	if !allowed {
@@ -521,20 +576,15 @@ func (e *Executor) handleSetVitessMetadata(ctx context.Context, k sqlparser.SetK
 
 	}
 
-	val, ok := v.(string)
-	if !ok {
-		return nil, vterrors.Errorf(vtrpcpb.Code_INVALID_ARGUMENT, "unexpected value type for charset: %T", v)
-	}
-
 	ts, err := e.serv.GetTopoServer()
 	if err != nil {
 		return nil, err
 	}
 
-	if val == "" {
-		err = ts.DeleteMetadata(ctx, k.Key)
+	if value == "" {
+		err = ts.DeleteMetadata(ctx, name)
 	} else {
-		err = ts.UpsertMetadata(ctx, k.Key, val)
+		err = ts.UpsertMetadata(ctx, name, value)
 	}
 
 	if err != nil {
@@ -1179,39 +1229,36 @@ func (e *Executor) getPlan(vcursor *vcursorImpl, sql string, comments sqlparser.
 	if err != nil {
 		return nil, err
 	}
-	if !e.normalize || !sqlparser.CanNormalize(stmt) {
-		plan, err := planbuilder.BuildFromStmt(sql, stmt, vcursor, sqlparser.BindVarNeeds{})
+
+	// Normalize if possible and retry.
+	query := sql
+	statement := stmt
+	bindVarNeeds := sqlparser.BindVarNeeds{}
+	if (e.normalize && sqlparser.CanNormalize(stmt)) || sqlparser.IsSetStatement(stmt) {
+		parameterize := e.normalize // the public flag is called normalize
+		result, err := sqlparser.PrepareAST(stmt, bindVars, "vtg", parameterize)
 		if err != nil {
 			return nil, err
 		}
-		if !skipQueryPlanCache && !sqlparser.SkipQueryPlanCacheDirective(stmt) && plan.Instructions != nil {
-			e.plans.Set(planKey, plan)
-		}
-		return plan, nil
-	}
-
-	// Normalize and retry.
-	result, err := sqlparser.PrepareAST(stmt, bindVars, "vtg")
-	if err != nil {
-		return nil, vterrors.Wrap(err, "failed to rewrite ast before planning")
+		statement = result.AST
+		bindVarNeeds = result.BindVarNeeds
+		query = sqlparser.String(statement)
 	}
-	rewrittenStatement := result.AST
-	normalized := sqlparser.String(rewrittenStatement)
 
 	if logStats != nil {
-		logStats.SQL = comments.Leading + normalized + comments.Trailing
+		logStats.SQL = comments.Leading + query + comments.Trailing
 		logStats.BindVariables = bindVars
 	}
 
-	planKey = vcursor.planPrefixKey() + ":" + normalized
+	planKey = vcursor.planPrefixKey() + ":" + query
 	if plan, ok := e.plans.Get(planKey); ok {
 		return plan.(*engine.Plan), nil
 	}
-	plan, err := planbuilder.BuildFromStmt(normalized, rewrittenStatement, vcursor, result.BindVarNeeds)
+	plan, err := planbuilder.BuildFromStmt(query, statement, vcursor, bindVarNeeds)
 	if err != nil {
 		return nil, err
 	}
-	if !skipQueryPlanCache && !sqlparser.SkipQueryPlanCacheDirective(rewrittenStatement) && plan.Instructions != nil {
+	if !skipQueryPlanCache && !sqlparser.SkipQueryPlanCacheDirective(statement) && plan.Instructions != nil {
 		e.plans.Set(planKey, plan)
 	}
 	return plan, nil
diff --git a/go/vt/vtgate/executor_set_test.go b/go/vt/vtgate/executor_set_test.go
index 6cf23168966..17b3f6a4dcc 100644
--- a/go/vt/vtgate/executor_set_test.go
+++ b/go/vt/vtgate/executor_set_test.go
@@ -19,6 +19,7 @@ package vtgate
 import (
 	"testing"
 
+	"vitess.io/vitess/go/mysql"
 	"vitess.io/vitess/go/test/utils"
 
 	"vitess.io/vitess/go/vt/vterrors"
@@ -117,7 +118,7 @@ func TestExecutorSet(t *testing.T) {
 		err: "unsupported in set: global",
 	}, {
 		in:  "set global @@session.client_found_rows = 1",
-		err: "unsupported in set: global",
+		err: "cannot use scope and @@",
 	}, {
 		in:  "set client_found_rows = 'aa'",
 		err: "unexpected value type for client_found_rows: string",
@@ -206,8 +207,12 @@ func TestExecutorSet(t *testing.T) {
 		in:  "set net_write_timeout = 600",
 		out: &vtgatepb.Session{Autocommit: true},
 	}, {
-		in:  "set sql_mode = 'STRICT_ALL_TABLES'",
-		out: &vtgatepb.Session{Autocommit: true},
+		in: "set sql_mode = 'STRICT_ALL_TABLES'",
+		out: &vtgatepb.Session{Autocommit: true,
+			Warnings: []*querypb.QueryWarning{{
+				Code:    mysql.ERNotSupportedYet,
+				Message: "Ignored inapplicable SET sql_mode = 'STRICT_ALL_TABLES'",
+			}}},
 	}, {
 		in:  "set net_read_timeout = 600",
 		out: &vtgatepb.Session{Autocommit: true},
@@ -253,6 +258,30 @@ func TestExecutorSet(t *testing.T) {
 	}, {
 		in:  "set @foo = 2.1, @bar = 'baz'",
 		out: &vtgatepb.Session{UserDefinedVariables: createMap([]string{"foo", "bar"}, []interface{}{2.1, "baz"}), Autocommit: true},
+	}, {
+		in:  "set session transaction isolation level repeatable read",
+		out: &vtgatepb.Session{Autocommit: true},
+	}, {
+		in:  "set session transaction isolation level read committed",
+		out: &vtgatepb.Session{Autocommit: true},
+	}, {
+		in:  "set session transaction isolation level read uncommitted",
+		out: &vtgatepb.Session{Autocommit: true},
+	}, {
+		in:  "set session transaction isolation level serializable",
+		out: &vtgatepb.Session{Autocommit: true},
+	}, {
+		in:  "set transaction isolation level serializable",
+		out: &vtgatepb.Session{Autocommit: true},
+	}, {
+		in:  "set transaction read only",
+		out: &vtgatepb.Session{Autocommit: true},
+	}, {
+		in:  "set transaction read write",
+		out: &vtgatepb.Session{Autocommit: true},
+	}, {
+		in:  "set session transaction read write",
+		out: &vtgatepb.Session{Autocommit: true},
 	}}
 	for _, tcase := range testcases {
 		t.Run(tcase.in, func(t *testing.T) {
diff --git a/go/vt/vtgate/executor_test.go b/go/vt/vtgate/executor_test.go
index 810d4ae498a..950712b508e 100644
--- a/go/vt/vtgate/executor_test.go
+++ b/go/vt/vtgate/executor_test.go
@@ -345,7 +345,7 @@ func TestExecutorAutocommit(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	_ = testQueryLog(t, logChan, "TestExecute", "SET", "set autocommit=1", 0)
+	_ = testQueryLog(t, logChan, "TestExecute", "SET", "set session autocommit = 1", 0)
 
 	// Setting autocommit=1 commits existing transaction.
 	if got, want := sbclookup.CommitCount.Get(), startCount+1; got != want {
diff --git a/go/vt/vtgate/planbuilder/builder.go b/go/vt/vtgate/planbuilder/builder.go
index 091235bd2b7..54b076790e2 100644
--- a/go/vt/vtgate/planbuilder/builder.go
+++ b/go/vt/vtgate/planbuilder/builder.go
@@ -305,7 +305,7 @@ func BuildFromStmt(query string, stmt sqlparser.Statement, vschema ContextVSchem
 		instruction, err = buildOtherReadAndAdmin(query, vschema)
 	case *sqlparser.Set:
 		instruction, err = buildSetPlan(query, stmt, vschema)
-	case *sqlparser.Show, *sqlparser.DBDDL:
+	case *sqlparser.Show, *sqlparser.DBDDL, *sqlparser.SetTransaction:
 		return nil, ErrPlanNotSupported
 	case *sqlparser.Begin, *sqlparser.Commit, *sqlparser.Rollback:
 		// Empty by design. Not executed by a plan
diff --git a/go/vt/vtgate/planbuilder/set.go b/go/vt/vtgate/planbuilder/set.go
index 9330e9dd46e..d145a5f5470 100644
--- a/go/vt/vtgate/planbuilder/set.go
+++ b/go/vt/vtgate/planbuilder/set.go
@@ -18,11 +18,13 @@ package planbuilder
 
 import (
 	"fmt"
+	"strings"
 
-	"vitess.io/vitess/go/vt/key"
 	vtrpcpb "vitess.io/vitess/go/vt/proto/vtrpc"
-	"vitess.io/vitess/go/vt/sqlparser"
 	"vitess.io/vitess/go/vt/vterrors"
+
+	"vitess.io/vitess/go/vt/key"
+	"vitess.io/vitess/go/vt/sqlparser"
 	"vitess.io/vitess/go/vt/vtgate/engine"
 )
 
@@ -38,13 +40,11 @@ func buildSetPlan(sql string, stmt *sqlparser.Set, vschema ContextVSchema) (engi
 	var setOp engine.SetOp
 	var err error
 
-	if stmt.Scope == sqlparser.GlobalStr {
-		return nil, vterrors.New(vtrpcpb.Code_INVALID_ARGUMENT, "unsupported in set: global")
-	}
-
 	for _, expr := range stmt.Exprs {
-		switch expr.Name.AtCount() {
-		case sqlparser.SingleAt:
+		switch expr.Scope {
+		case sqlparser.GlobalStr:
+			return nil, vterrors.New(vtrpcpb.Code_INVALID_ARGUMENT, "unsupported in set: global")
+		case "":
 			pv, err := sqlparser.NewPlanValue(expr.Expr)
 			if err != nil {
 				return nil, err
@@ -53,7 +53,7 @@ func buildSetPlan(sql string, stmt *sqlparser.Set, vschema ContextVSchema) (engi
 				Name:      expr.Name.Lowered(),
 				PlanValue: pv,
 			}
-		case sqlparser.DoubleAt:
+		case sqlparser.SessionStr:
 			planFunc, ok := sysVarPlanningFunc[expr.Name.Lowered()]
 			if !ok {
 				return nil, ErrPlanNotSupported
@@ -85,6 +85,10 @@ func buildSetOpIgnore(expr *sqlparser.SetExpr, _ ContextVSchema) (engine.SetOp,
 func buildSetOpCheckAndIgnore(expr *sqlparser.SetExpr, vschema ContextVSchema) (engine.SetOp, error) {
 	keyspace, err := vschema.DefaultKeyspace()
 	if err != nil {
+		//TODO: Record warning for switching plan construct.
+		if strings.HasPrefix(err.Error(), "no keyspace in database name specified") {
+			return buildSetOpIgnore(expr, vschema)
+		}
 		return nil, err
 	}