schema(cdc): fix DML construct error caused by 'rename tables' DDL (p…

…ingcap#5068) (pingcap#5080)

* fix(schema): fix DML construct error caused by 'rename tables' DDL

close  pingcap#5059

Co-authored-by: maxshuang <huangguohao@pingcap.com>
Co-authored-by: Neil Shen <overvenus@gmail.com>

cdc/entry/schema_storage.go

@@ -603,7 +603,10 @@ func (s *schemaSnapshot) handleDDL(job *timodel.Job) error {
 			return errors.Trace(err)
 		}
 	case timodel.ActionRenameTables:
-		return s.renameTables(job)
+		err := s.renameTables(job)
+		if err != nil {
+			return errors.Trace(err)
+		}
 	case timodel.ActionCreateTable, timodel.ActionCreateView, timodel.ActionRecoverTable:
 		err := s.createTable(getWrapTableInfo(job))
 		if err != nil {
@@ -827,7 +830,8 @@ func (s *schemaStorageImpl) HandleDDLJob(job *timodel.Job) error {
 		lastSnap := s.snaps[len(s.snaps)-1]
 		if job.BinlogInfo.FinishedTS <= lastSnap.currentTs {
 			log.Info("ignore foregone DDL", zap.Int64("jobID", job.ID),
-				zap.String("DDL", job.Query), zap.String("changefeed", s.id))
+				zap.String("DDL", job.Query), zap.String("changefeed", s.id),
+				zap.Uint64("finishTs", job.BinlogInfo.FinishedTS))
 			return nil
 		}
 		snap = lastSnap.Clone()
@@ -837,11 +841,13 @@ func (s *schemaStorageImpl) HandleDDLJob(job *timodel.Job) error {
 	if err := snap.handleDDL(job); err != nil {
 		log.Error("handle DDL failed", zap.String("DDL", job.Query),
 			zap.Stringer("job", job), zap.Error(err),
-			zap.String("changefeed", s.id))
+			zap.String("changefeed", s.id), zap.Uint64("finishTs", job.BinlogInfo.FinishedTS))
 		return errors.Trace(err)
 	}
 	log.Info("handle DDL", zap.String("DDL", job.Query),
-		zap.Stringer("job", job), zap.String("changefeed", s.id))
+		zap.Stringer("job", job), zap.String("changefeed", s.id),
+		zap.Uint64("finishTs", job.BinlogInfo.FinishedTS))
+
 	s.snaps = append(s.snaps, snap)
 	s.AdvanceResolvedTs(job.BinlogInfo.FinishedTS)
 	return nil

cdc/entry/schema_storage_test.go

@@ -410,9 +410,11 @@ func TestHandleRenameTables(t *testing.T) {
 	rawArgs, err := json.Marshal(args)
 	require.Nil(t, err)
 	var job *timodel.Job = &timodel.Job{
-		Type:       timodel.ActionRenameTables,
-		RawArgs:    rawArgs,
-		BinlogInfo: &timodel.HistoryInfo{},
+		Type:    timodel.ActionRenameTables,
+		RawArgs: rawArgs,
+		BinlogInfo: &timodel.HistoryInfo{
+			FinishedTS: 11112222,
+		},
 	}
 	job.BinlogInfo.MultipleTableInfos = append(job.BinlogInfo.MultipleTableInfos,
 		&timodel.TableInfo{
@@ -442,6 +444,7 @@ func TestHandleRenameTables(t *testing.T) {
 	t2 := model.TableName{Schema: "db_1", Table: "y"}
 	require.Equal(t, snap.tableNameToID[t1], int64(13))
 	require.Equal(t, snap.tableNameToID[t2], int64(14))
+	require.Equal(t, uint64(11112222), snap.currentTs)
 }
 
 func testDoDDLAndCheck(t *testing.T, snap *schemaSnapshot, job *timodel.Job, isErr bool) {

cdc/processor/processor.go

@@ -937,6 +937,9 @@ func (p *processor) createTablePipelineImpl(ctx cdcContext.Context, tableID mode
 		p.sendError(err)
 		return nil
 	})
+
+	// FIXME: using GetLastSnapshot here would be confused and get the wrong table name
+	// after `rename table` DDL, since `rename table` keeps the tableID unchanged
 	var tableName *model.TableName
 	retry.Do(ctx, func() error { //nolint:errcheck
 		if name, ok := p.schemaStorage.GetLastSnapshot().GetTableNameByID(tableID); ok {

tests/integration_tests/rename_tables/conf/diff_config.toml

@@ -0,0 +1,29 @@
+# diff Configuration.
+
+check-thread-count = 4
+
+export-fix-sql = true
+
+check-struct-only = false
+
+[task]
+    output-dir = "/tmp/tidb_cdc_test/rename_tables/sync_diff/output"
+
+    source-instances = ["tidb0"]
+
+    target-instance = "mysql1"
+
+    target-check-tables = ["rename_tables_test.?*"]
+
+[data-sources]
+[data-sources.tidb0]
+    host = "127.0.0.1"
+    port = 4000
+    user = "root"
+    password = ""
+
+[data-sources.mysql1]
+    host = "127.0.0.1"
+    port = 3306
+    user = "root"
+    password = ""

tests/integration_tests/rename_tables/data/test.sql

@@ -0,0 +1,53 @@
+drop database if exists `rename_tables_test`;
+create database `rename_tables_test`;
+use `rename_tables_test`;
+
+create table t1 (
+ value64  bigint unsigned  not null,
+ primary key(value64)
+);
+insert into t1 values(17156792991891826145);
+insert into t1 values(91891826145);
+delete from t1 where value64=17156792991891826145;
+update t1 set value64=17156792991891826;
+update t1 set value64=56792991891826;
+
+rename table t1 to t1_1;
+
+create table t2 (
+ value64  bigint unsigned  not null,
+ primary key(value64)
+);
+insert into t2 values(17156792991891826145);
+insert into t2 values(91891826145);
+delete from t2 where value64=91891826145;
+update t2 set value64=17156792991891826;
+update t2 set value64=56792991891826;
+
+rename table t2 to t2_2;
+
+create table t1 (
+ value64  bigint unsigned  not null,
+ value32  integer          not null,
+ primary key(value64, value32)
+);
+
+create table t2 (
+ value64  bigint unsigned  not null,
+ value32  integer          not null,
+ primary key(value64, value32)
+);
+
+insert into t1 values(17156792991891826145, 1);
+insert into t1 values( 9223372036854775807, 2);
+insert into t2 values(17156792991891826145, 3);
+insert into t2 values( 9223372036854775807, 4);
+
+rename table t1 to t1_7, t2 to t2_7;
+
+insert into t1_7 values(91891826145, 5);
+insert into t1_7 values(685477580, 6);
+insert into t2_7 values(1715679991826145, 7);
+insert into t2_7 values(2036854775807, 8);
+
+create table finish_mark(id int primary key);

tests/integration_tests/rename_tables/run.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+
+set -eu
+
+CUR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+source $CUR/../_utils/test_prepare
+WORK_DIR=$OUT_DIR/$TEST_NAME
+CDC_BINARY=cdc.test
+SINK_TYPE=$1
+
+function run() {
+	rm -rf $WORK_DIR && mkdir -p $WORK_DIR
+
+	start_tidb_cluster --workdir $WORK_DIR
+
+	cd $WORK_DIR
+
+	# record tso before we create tables to skip the system table DDLs
+	start_ts=$(cdc cli tso query --pd=http://$UP_PD_HOST_1:$UP_PD_PORT_1)
+
+	run_cdc_server --workdir $WORK_DIR --binary $CDC_BINARY
+
+	TOPIC_NAME="ticdc-rename-tables-test-$RANDOM"
+	case $SINK_TYPE in
+	kafka) SINK_URI="kafka://127.0.0.1:9092/$TOPIC_NAME?protocol=open-protocol&partition-num=4&kafka-version=${KAFKA_VERSION}&max-message-bytes=10485760" ;;
+	*) SINK_URI="mysql://normal:123456@127.0.0.1:3306/" ;;
+	esac
+	cdc cli changefeed create --start-ts=$start_ts --sink-uri="$SINK_URI"
+	if [ "$SINK_TYPE" == "kafka" ]; then
+		run_kafka_consumer $WORK_DIR "kafka://127.0.0.1:9092/$TOPIC_NAME?protocol=open-protocol&partition-num=4&version=${KAFKA_VERSION}&max-message-bytes=10485760"
+	fi
+	run_sql_file $CUR/data/test.sql ${UP_TIDB_HOST} ${UP_TIDB_PORT}
+	# sync_diff can't check non-exist table, so we check expected tables are created in downstream first
+
+	check_table_exists rename_tables_test.finish_mark ${DOWN_TIDB_HOST} ${DOWN_TIDB_PORT}
+	echo "check table exists success"
+	check_sync_diff $WORK_DIR $CUR/conf/diff_config.toml 60
+
+	cleanup_process $CDC_BINARY
+}
+
+trap stop_tidb_cluster EXIT
+run $*
+check_logs $WORK_DIR
+echo "[$(date)] <<<<<< run test case $TEST_NAME success! >>>>>>"