ddl: fix duplicate inforSchema information of rename tables (pingcap#…

…47087) (pingcap#47141)

close pingcap#47064

ddl/db_rename_test.go

@@ -293,3 +293,15 @@ func TestRenameMultiTables(t *testing.T) {
 	tk.MustExec("drop database test1")
 	tk.MustExec("drop database test")
 }
+
+func TestRenameMultiTablesIssue47064(t *testing.T) {
+	store := testkit.CreateMockStore(t, mockstore.WithDDLChecker())
+
+	tk := testkit.NewTestKit(t, store)
+	tk.MustExec("use test")
+	tk.MustExec("create table t1(a int)")
+	tk.MustExec("create table t2(a int)")
+	tk.MustExec("create database test1")
+	tk.MustExec("rename table test.t1 to test1.t1, test.t2 to test1.t2")
+	tk.MustQuery("select column_name from information_schema.columns where table_name = 't1'").Check(testkit.Rows("a"))
+}

ddl/ddl_worker.go

@@ -1542,9 +1542,13 @@ func updateSchemaVersion(d *ddlCtx, t *meta.Meta, job *model.Job, multiInfos ...
 		if err != nil {
 			return 0, errors.Trace(err)
 		}
-		affects := make([]*model.AffectedOption, len(newSchemaIDs))
+		affects := make([]*model.AffectedOption, len(newSchemaIDs)-1)
 		for i, newSchemaID := range newSchemaIDs {
-			affects[i] = &model.AffectedOption{
+			// Do not add the first table to AffectedOpts. Related issue tidb#47064.
+			if i == 0 {
+				continue
+			}
+			affects[i-1] = &model.AffectedOption{
 				SchemaID:    newSchemaID,
 				TableID:     tableIDs[i],
 				OldTableID:  tableIDs[i],

ddl/foreign_key_test.go

@@ -1849,7 +1849,7 @@ func TestRenameTablesWithForeignKey(t *testing.T) {
 	// check the schema diff
 	diff := getLatestSchemaDiff(t, tk)
 	require.Equal(t, model.ActionRenameTables, diff.Type)
-	require.Equal(t, 3, len(diff.AffectedOpts))
+	require.Equal(t, 2, len(diff.AffectedOpts))
 
 	// check referred foreign key information.
 	t1ReferredFKs := getTableInfoReferredForeignKeys(t, dom, "test", "t1")