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Parsing support for SHOW COLLATION WHERE #4067

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Merged
sougou merged 1 commit into from
Jul 9, 2018
Merged

Parsing support for SHOW COLLATION WHERE #4067

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12 changes: 8 additions & 4 deletions go/vt/sqlparser/ast.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1280,10 +1280,11 @@ func (node VindexParam) walkSubtree(visit Visit) error {

// Show represents a show statement.
type Show struct {
Type string
OnTable TableName
ShowTablesOpt *ShowTablesOpt
Scope string
Type string
OnTable TableName
ShowTablesOpt *ShowTablesOpt
Scope string
ShowCollationFilterOpt *Expr
}

// Format formats the node.
Expand All @@ -1308,6 +1309,9 @@ func (node *Show) Format(buf *TrackedBuffer) {
if node.HasOnTable() {
buf.Myprintf(" on %v", node.OnTable)
}
if node.Type == "collation" && node.ShowCollationFilterOpt != nil {
buf.Myprintf(" where %v", *node.ShowCollationFilterOpt)
}
}

// HasOnTable returns true if the show statement has an "on" clause
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3 changes: 3 additions & 0 deletions go/vt/sqlparser/parse_test.go
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Expand Up @@ -990,6 +990,9 @@ var (
}, {
input: "show collation",
output: "show collation",
}, {
input: "show collation where `Charset` = 'utf8' and `Collation` = 'utf8_bin'",
output: "show collation where `Charset` = 'utf8' and `Collation` = 'utf8_bin'",
}, {
input: "show create database d",
output: "show create database",
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