Fixed spurious error message for event scheduling when the dolt_schem…

go/go.mod

@@ -66,6 +66,7 @@ require (
 	github.com/jmoiron/sqlx v1.3.4
 	github.com/kch42/buzhash v0.0.0-20160816060738-9bdec3dec7c6
 	github.com/kylelemons/godebug v1.1.0
+	github.com/lib/pq v1.10.9
 	github.com/oracle/oci-go-sdk/v65 v65.55.0
 	github.com/prometheus/client_golang v1.13.0
 	github.com/rs/zerolog v1.28.0
@@ -128,7 +129,6 @@ require (
 	github.com/klauspost/compress v1.10.5 // indirect
 	github.com/klauspost/cpuid/v2 v2.0.12 // indirect
 	github.com/lestrrat-go/strftime v1.0.4 // indirect
-	github.com/lib/pq v1.10.9 // indirect
 	github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect

go/go.sum

@@ -463,7 +463,6 @@ github.com/lestrrat-go/envload v0.0.0-20180220234015-a3eb8ddeffcc/go.mod h1:kopu
 github.com/lestrrat-go/strftime v1.0.4 h1:T1Rb9EPkAhgxKqbcMIPguPq8glqXTA1koF8n9BHElA8=
 github.com/lestrrat-go/strftime v1.0.4/go.mod h1:E1nN3pCbtMSu1yjSVeyuRFVm/U0xoR76fd03sz+Qz4g=
 github.com/lib/pq v1.2.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
-github.com/lib/pq v1.10.0 h1:Zx5DJFEYQXio93kgXnQ09fXNiUKsqv4OUEu2UtGcB1E=
 github.com/lib/pq v1.10.0/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=

go/libraries/doltcore/sqle/database.go

@@ -1353,6 +1353,12 @@ func (db Database) GetEvents(ctx *sql.Context) (events []sql.EventDefinition, to
 
 // NeedsToReloadEvents implements sql.EventDatabase.
 func (db Database) NeedsToReloadEvents(ctx *sql.Context, token interface{}) (bool, error) {
+	// A nil token means no events in this db. If the dolt_schemas table doesn't exist, it will have a zero hash below
+	// as well, meaning we don't reload events in that case.
+	if token == nil {
+		token = hash.Hash{}
+	}
+
 	hash, ok := token.(hash.Hash)
 	if !ok {
 		return false, fmt.Errorf("expected token to be hash.Hash, but received %T", token)

go/libraries/doltcore/sqle/database_test.go

@@ -15,11 +15,16 @@
 package sqle
 
 import (
+	"context"
 	"testing"
-
-	"github.com/dolthub/dolt/go/libraries/doltcore/sqle/dsess"
+	"time"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/dolthub/dolt/go/libraries/doltcore/dtestutils"
+	"github.com/dolthub/dolt/go/libraries/doltcore/sqle/dsess"
+	"github.com/dolthub/dolt/go/libraries/doltcore/table/editor"
 )
 
 func testKeyFunc(t *testing.T, keyFunc func(string) (bool, string), testVal string, expectedIsKey bool, expectedDBName string) {
@@ -36,3 +41,71 @@ func TestIsKeyFuncs(t *testing.T) {
 	testKeyFunc(t, dsess.IsHeadKey, "dolt_working", false, "")
 	testKeyFunc(t, dsess.IsWorkingKey, "dolt_working", true, "dolt")
 }
+
+func TestNeedsToReloadEvents(t *testing.T) {
+	dEnv := dtestutils.CreateTestEnv()
+	tmpDir, err := dEnv.TempTableFilesDir()
+	require.NoError(t, err)
+	opts := editor.Options{Deaf: dEnv.DbEaFactory(), Tempdir: tmpDir}
+
+	timestamp := time.Now().Truncate(time.Minute).UTC()
+
+	db, err := NewDatabase(context.Background(), "dolt", dEnv.DbData(), opts)
+	require.NoError(t, err)
+
+	_, ctx, err := NewTestEngine(dEnv, context.Background(), db)
+	require.NoError(t, err)
+
+	var token any
+
+	t.Run("empty schema table doesn't need to be reloaded", func(t *testing.T) {
+		needsReload, err := db.NeedsToReloadEvents(ctx, token)
+		require.NoError(t, err)
+		assert.False(t, needsReload)
+	})
+
+	eventDefn := `CREATE EVENT testEvent
+ON SCHEDULE
+    EVERY 1 DAY
+    STARTS now()
+DO
+BEGIN
+    CALL archive_order_history(DATE_SUB(CURDATE(), INTERVAL 1 YEAR));
+END`
+
+	err = db.addFragToSchemasTable(ctx, "event", "testEvent", eventDefn, timestamp, nil)
+	require.NoError(t, err)
+
+	t.Run("events need to be reloaded after addition", func(t *testing.T) {
+		needsReload, err := db.NeedsToReloadEvents(ctx, token)
+		require.NoError(t, err)
+		assert.True(t, needsReload)
+	})
+
+	_, token, err = db.GetEvents(ctx)
+	require.NoError(t, err)
+
+	t.Run("events do not need to be reloaded after no change", func(t *testing.T) {
+		needsReload, err := db.NeedsToReloadEvents(ctx, token)
+		require.NoError(t, err)
+		assert.False(t, needsReload)
+	})
+
+	err = db.dropFragFromSchemasTable(ctx, "event", "testEvent", nil)
+	require.NoError(t, err)
+
+	t.Run("events need to be reloaded after dropping one", func(t *testing.T) {
+		needsReload, err := db.NeedsToReloadEvents(ctx, token)
+		require.NoError(t, err)
+		assert.True(t, needsReload)
+	})
+
+	_, token, err = db.GetEvents(ctx)
+	require.NoError(t, err)
+
+	t.Run("events do not need to be reloaded after no change", func(t *testing.T) {
+		needsReload, err := db.NeedsToReloadEvents(ctx, token)
+		require.NoError(t, err)
+		assert.False(t, needsReload)
+	})
+}

go/libraries/doltcore/sqle/procedures_table_test.go

@@ -41,7 +41,7 @@ func TestProceduresMigration(t *testing.T) {
 
 	timestamp := time.Now().Truncate(time.Minute).UTC()
 
-	ctx, db := newDatabase(t, dEnv, opts, timestamp)
+	ctx, db := newDatabaseWithProcedures(t, dEnv, opts, timestamp)
 
 	t.Run("test migration logic", func(t *testing.T) {
 		// Call the logic to migrate it to the latest schema
@@ -102,7 +102,7 @@ func TestProceduresMigration(t *testing.T) {
 
 }
 
-func newDatabase(t *testing.T, dEnv *env.DoltEnv, opts editor.Options, timestamp time.Time) (*sql.Context, *Database) {
+func newDatabaseWithProcedures(t *testing.T, dEnv *env.DoltEnv, opts editor.Options, timestamp time.Time) (*sql.Context, *Database) {
 	db, err := NewDatabase(context.Background(), "dolt", dEnv.DbData(), opts)
 	require.NoError(t, err)