ddl: move auto id handling from submitter to executor (#62449)

joechenrh · ti-chi-bot · commit ac0fc2249c3d · 2025-11-28T10:22:07.000Z
close #60804
diff --git a/pkg/ddl/create_table.go b/pkg/ddl/create_table.go
@@ -56,7 +56,7 @@ import (
 // DANGER: it is an internal function used by onCreateTable and onCreateTables, for reusing code. Be careful.
 // 1. it expects the argument of job has been deserialized.
 // 2. it won't call updateSchemaVersion, FinishTableJob and asyncNotifyEvent.
-func createTable(jobCtx *jobContext, job *model.Job, args *model.CreateTableArgs) (*model.TableInfo, error) {
+func createTable(jobCtx *jobContext, job *model.Job, r autoid.Requirement, args *model.CreateTableArgs) (*model.TableInfo, error) {
 	schemaID := job.SchemaID
 	tbInfo, fkCheck := args.TableInfo, args.FKCheck
 
@@ -146,12 +146,59 @@ func createTable(jobCtx *jobContext, job *model.Job, args *model.CreateTableArgs
 			return tbInfo, errors.Wrapf(err, "failed to notify PD the placement rules")
 		}
 
+		// Updating auto id meta kv is done in a separate txn.
+		// It's ok as these data are bind with table ID, and we won't use these
+		// table IDs until info schema version is updated.
+		if err := handleAutoIncID(r, job, tbInfo); err != nil {
+			return tbInfo, errors.Trace(err)
+		}
+
 		return tbInfo, nil
 	default:
 		return tbInfo, dbterror.ErrInvalidDDLState.GenWithStackByArgs("table", tbInfo.State)
 	}
 }
 
+type autoIDType struct {
+	End int64
+	Tp  autoid.AllocatorType
+}
+
+// handleAutoIncID handles auto_increment option in DDL. It creates a ID counter for the table and initiates the counter to a proper value.
+// For example if the option sets auto_increment to 10. The counter will be set to 9. So the next allocated ID will be 10.
+func handleAutoIncID(r autoid.Requirement, job *model.Job, tbInfo *model.TableInfo) error {
+	allocs := autoid.NewAllocatorsFromTblInfo(r, job.SchemaID, tbInfo)
+
+	hs := make([]autoIDType, 0, 3)
+	if tbInfo.AutoIncID > 1 {
+		// Default tableAutoIncID base is 0.
+		// If the first ID is expected to greater than 1, we need to do rebase.
+		if tbInfo.SepAutoInc() {
+			hs = append(hs, autoIDType{tbInfo.AutoIncID - 1, autoid.AutoIncrementType})
+		} else {
+			hs = append(hs, autoIDType{tbInfo.AutoIncID - 1, autoid.RowIDAllocType})
+		}
+	}
+	if tbInfo.AutoIncIDExtra != 0 {
+		hs = append(hs, autoIDType{tbInfo.AutoIncIDExtra - 1, autoid.RowIDAllocType})
+	}
+	if tbInfo.AutoRandID > 1 {
+		// Default tableAutoRandID base is 0.
+		// If the first ID is expected to greater than 1, we need to do rebase.
+		hs = append(hs, autoIDType{tbInfo.AutoRandID - 1, autoid.AutoRandomType})
+	}
+
+	for _, h := range hs {
+		if alloc := allocs.Get(h.Tp); alloc != nil {
+			if err := alloc.Rebase(context.Background(), h.End, false); err != nil {
+				return errors.Trace(err)
+			}
+		}
+	}
+
+	return nil
+}
+
 func (w *worker) onCreateTable(jobCtx *jobContext, job *model.Job) (ver int64, _ error) {
 	failpoint.Inject("mockExceedErrorLimit", func(val failpoint.Value) {
 		if val.(bool) {
@@ -173,7 +220,10 @@ func (w *worker) onCreateTable(jobCtx *jobContext, job *model.Job) (ver int64, _
 		return w.createTableWithForeignKeys(jobCtx, job, args)
 	}
 
-	tbInfo, err = createTable(jobCtx, job, args)
+	tbInfo, err = createTable(jobCtx, job, &asAutoIDRequirement{
+		store:     w.store,
+		autoidCli: w.autoidCli,
+	}, args)
 	if err != nil {
 		return ver, errors.Trace(err)
 	}
@@ -201,7 +251,10 @@ func (w *worker) createTableWithForeignKeys(jobCtx *jobContext, job *model.Job,
 		// the `tbInfo.State` with `model.StateNone`, so it's fine to just call the `createTable` with
 		// public state.
 		// when `br` restores table, the state of `tbInfo` will be public.
-		tbInfo, err = createTable(jobCtx, job, args)
+		tbInfo, err = createTable(jobCtx, job, &asAutoIDRequirement{
+			store:     w.store,
+			autoidCli: w.autoidCli,
+		}, args)
 		if err != nil {
 			return ver, errors.Trace(err)
 		}
@@ -266,7 +319,10 @@ func (w *worker) onCreateTables(jobCtx *jobContext, job *model.Job) (int64, erro
 			}
 			tableInfos = append(tableInfos, tableInfo)
 		} else {
-			tbInfo, err := createTable(jobCtx, stubJob, tblArgs)
+			tbInfo, err := createTable(jobCtx, stubJob, &asAutoIDRequirement{
+				store:     w.store,
+				autoidCli: w.autoidCli,
+			}, tblArgs)
 			if err != nil {
 				job.State = model.JobStateCancelled
 				return ver, errors.Trace(err)
diff --git a/pkg/ddl/executor.go b/pkg/ddl/executor.go
@@ -1145,47 +1145,6 @@ func getSharedInvolvingSchemaInfo(info *model.TableInfo) []model.InvolvingSchema
 	return ret
 }
 
-func (e *executor) createTableWithInfoPost(
-	ctx sessionctx.Context,
-	tbInfo *model.TableInfo,
-	schemaID int64,
-	scatterScope string,
-) error {
-	var err error
-	var partitions []model.PartitionDefinition
-	if pi := tbInfo.GetPartitionInfo(); pi != nil {
-		partitions = pi.Definitions
-	}
-	preSplitAndScatter(ctx, e.store, tbInfo, partitions, scatterScope)
-	if tbInfo.AutoIncID > 1 {
-		// Default tableAutoIncID base is 0.
-		// If the first ID is expected to greater than 1, we need to do rebase.
-		newEnd := tbInfo.AutoIncID - 1
-		var allocType autoid.AllocatorType
-		if tbInfo.SepAutoInc() {
-			allocType = autoid.AutoIncrementType
-		} else {
-			allocType = autoid.RowIDAllocType
-		}
-		if err = e.handleAutoIncID(tbInfo, schemaID, newEnd, allocType); err != nil {
-			return errors.Trace(err)
-		}
-	}
-	// For issue https://github.com/pingcap/tidb/issues/46093
-	if tbInfo.AutoIncIDExtra != 0 {
-		if err = e.handleAutoIncID(tbInfo, schemaID, tbInfo.AutoIncIDExtra-1, autoid.RowIDAllocType); err != nil {
-			return errors.Trace(err)
-		}
-	}
-	if tbInfo.AutoRandID > 1 {
-		// Default tableAutoRandID base is 0.
-		// If the first ID is expected to greater than 1, we need to do rebase.
-		newEnd := tbInfo.AutoRandID - 1
-		err = e.handleAutoIncID(tbInfo, schemaID, newEnd, autoid.AutoRandomType)
-	}
-	return err
-}
-
 func (e *executor) CreateTableWithInfo(
 	ctx sessionctx.Context,
 	dbName pmodel.CIStr,
@@ -1215,9 +1174,9 @@ func (e *executor) CreateTableWithInfo(
 		if val, ok := jobW.GetSessionVars(variable.TiDBScatterRegion); ok {
 			scatterScope = val
 		}
-		err = e.createTableWithInfoPost(ctx, tbInfo, jobW.SchemaID, scatterScope)
-	}
 
+		preSplitAndScatterTable(ctx, e.store, tbInfo, scatterScope)
+	}
 	return errors.Trace(err)
 }
 
@@ -1312,9 +1271,7 @@ func (e *executor) BatchCreateTableWithInfo(ctx sessionctx.Context,
 		scatterScope = val
 	}
 	for _, tblArgs := range args.Tables {
-		if err = e.createTableWithInfoPost(ctx, tblArgs.TableInfo, jobW.SchemaID, scatterScope); err != nil {
-			return errors.Trace(err)
-		}
+		preSplitAndScatterTable(ctx, e.store, tblArgs.TableInfo, scatterScope)
 	}
 
 	return nil
@@ -1397,6 +1354,14 @@ func preSplitAndScatter(ctx sessionctx.Context, store kv.Storage, tbInfo *model.
 	}
 }
 
+func preSplitAndScatterTable(ctx sessionctx.Context, store kv.Storage, tbInfo *model.TableInfo, scatterScope string) {
+	var partitions []model.PartitionDefinition
+	if pi := tbInfo.GetPartitionInfo(); pi != nil {
+		partitions = pi.Definitions
+	}
+	preSplitAndScatter(ctx, store, tbInfo, partitions, scatterScope)
+}
+
 func (e *executor) FlashbackCluster(ctx sessionctx.Context, flashbackTS uint64) error {
 	logutil.DDLLogger().Info("get flashback cluster job", zap.Stringer("flashbackTS", oracle.GetTimeFromTS(flashbackTS)))
 	nowTS, err := ctx.GetStore().GetOracle().GetTimestamp(e.ctx, &oracle.Option{})
@@ -1531,19 +1496,6 @@ func checkCharsetAndCollation(cs string, co string) error {
 	return nil
 }
 
-// handleAutoIncID handles auto_increment option in DDL. It creates a ID counter for the table and initiates the counter to a proper value.
-// For example if the option sets auto_increment to 10. The counter will be set to 9. So the next allocated ID will be 10.
-func (e *executor) handleAutoIncID(tbInfo *model.TableInfo, schemaID int64, newEnd int64, tp autoid.AllocatorType) error {
-	allocs := autoid.NewAllocatorsFromTblInfo(e.getAutoIDRequirement(), schemaID, tbInfo)
-	if alloc := allocs.Get(tp); alloc != nil {
-		err := alloc.Rebase(context.Background(), newEnd, false)
-		if err != nil {
-			return errors.Trace(err)
-		}
-	}
-	return nil
-}
-
 func (e *executor) getAutoIDRequirement() autoid.Requirement {
 	return &asAutoIDRequirement{
 		store:     e.store,
diff --git a/pkg/ddl/table.go b/pkg/ddl/table.go
@@ -577,15 +577,11 @@ func (w *worker) onTruncateTable(jobCtx *jobContext, job *model.Job) (ver int64,
 		}
 	})
 
-	var partitions []model.PartitionDefinition
-	if pi := tblInfo.GetPartitionInfo(); pi != nil {
-		partitions = tblInfo.GetPartitionInfo().Definitions
-	}
 	var scatterScope string
 	if val, ok := job.GetSessionVars(variable.TiDBScatterRegion); ok {
 		scatterScope = val
 	}
-	preSplitAndScatter(w.sess.Context, jobCtx.store, tblInfo, partitions, scatterScope)
+	preSplitAndScatterTable(w.sess.Context, jobCtx.store, tblInfo, scatterScope)
 
 	ver, err = updateSchemaVersion(jobCtx, job)
 	if err != nil {
diff --git a/pkg/ddl/tests/fastcreatetable/fastcreatetable_test.go b/pkg/ddl/tests/fastcreatetable/fastcreatetable_test.go
@@ -130,20 +130,41 @@ func TestMergedJob(t *testing.T) {
 	wg.Run(func() {
 		tk1 := testkit.NewTestKit(t, store)
 		tk1.MustExec("use test")
-		tk1.MustExecToErr("create table t(a int)")
+		tk1.MustExecToErr("create table t1(id int AUTO_INCREMENT, c int) AUTO_INCREMENT 1000")
 	})
 	wg.Run(func() {
 		tk1 := testkit.NewTestKit(t, store)
 		tk1.MustExec("use test")
-		tk1.MustExecToErr("create table t1(a int)")
+		tk1.MustExecToErr("create table t(a int)")
 	})
 	require.Eventually(t, func() bool {
 		gotJobs, err := ddl.GetAllDDLJobs(ctx, tk.Session())
 		require.NoError(t, err)
 		return len(gotJobs) == 2 && gotJobs[1].Type == model.ActionCreateTables
 	}, 10*time.Second, 100*time.Millisecond)
 
+	// below 2 jobs are merged into the third group, they will succeed together.
+	wg.Run(func() {
+		tk1 := testkit.NewTestKit(t, store)
+		tk1.MustExec("use test")
+		tk1.MustExec("create table t1(id int AUTO_INCREMENT, c int) AUTO_INCREMENT 100")
+	})
+	wg.Run(func() {
+		tk1 := testkit.NewTestKit(t, store)
+		tk1.MustExec("use test")
+		tk1.MustExec("create table t2(id int AUTO_INCREMENT, c int) AUTO_INCREMENT 100")
+	})
+	require.Eventually(t, func() bool {
+		gotJobs, err := ddl.GetAllDDLJobs(ctx, tk.Session())
+		require.NoError(t, err)
+		return len(gotJobs) == 3 && gotJobs[2].Type == model.ActionCreateTables
+	}, 10*time.Second, 100*time.Millisecond)
+
 	// start to run the jobs
 	close(startSchedule)
 	wg.Wait()
+
+	// Test the correctness of auto id after failed merge job 2
+	tk.MustExec("insert into test.t1(c) values(1)")
+	tk.MustQuery("select * from test.t1").Check(testkit.Rows("100 1"))
 }
