restore: don't restore auto id if the table doesn't has it.

pkg/backup/client.go

@@ -268,8 +268,8 @@ func BuildBackupRangeAndSchema(
 			switch {
 			case tableInfo.IsSequence():
 				globalAutoID, err = seqAlloc.NextGlobalAutoID(tableInfo.ID)
-			case tableInfo.IsView():
-				// no auto ID for views.
+			case tableInfo.IsView() || !utils.NeedAutoID(tableInfo):
+				// no auto ID for views or table without either rowID nor auto_increment ID.
 			default:
 				globalAutoID, err = idAlloc.NextGlobalAutoID(tableInfo.ID)
 			}

pkg/restore/db.go

@@ -150,6 +150,7 @@ func (db *DB) CreateTable(ctx context.Context, table *utils.Table) error {
 			}
 		}
 		restoreMetaSQL = fmt.Sprintf(setValFormat, table.Info.AutoIncID)
+		err = db.se.Execute(ctx, restoreMetaSQL)
 	} else {
 		var alterAutoIncIDFormat string
 		switch {
@@ -163,9 +164,11 @@ func (db *DB) CreateTable(ctx context.Context, table *utils.Table) error {
 			utils.EncloseName(table.Db.Name.O),
 			utils.EncloseName(table.Info.Name.O),
 			table.Info.AutoIncID)
+		if utils.NeedAutoID(table.Info) {
+			err = db.se.Execute(ctx, restoreMetaSQL)
+		}
 	}
 
-	err = db.se.Execute(ctx, restoreMetaSQL)
 	if err != nil {
 		log.Error("restore meta sql failed",
 			zap.String("query", restoreMetaSQL),

pkg/utils/schema.go

@@ -40,6 +40,13 @@ func (tbl *Table) NoChecksum() bool {
 	return tbl.Crc64Xor == 0 && tbl.TotalKvs == 0 && tbl.TotalBytes == 0
 }
 
+// NeedAutoID checks whether the table needs backing up with an autoid.
+func NeedAutoID(tblInfo *model.TableInfo) bool {
+	hasRowID := !tblInfo.PKIsHandle && !tblInfo.IsCommonHandle
+	hasAutoIncID := tblInfo.GetAutoIncrementColInfo() != nil
+	return hasRowID || hasAutoIncID
+}
+
 // Database wraps the schema and tables of a database.
 type Database struct {
 	Info   *model.DBInfo