test: remove multi-schema change from mock upgrade test (#50176)

close pingcap/tidb#49870

.gitignore

@@ -13,6 +13,7 @@ tests/integrationtest/integration-test.out
 tests/integrationtest/integrationtest_tidb-server
 tests/integrationtest/portgenerator
 tests/integrationtest/s/
+tests/integrationtest/replayer/
 *.fail.go
 tools/bin/
 vendor
@@ -39,3 +40,4 @@ bazel-tidb
 *.log.json
 genkeyword
 test_coverage
+coverage.dat

pkg/session/bootstrap_test.go

@@ -18,6 +18,7 @@ import (
 	"context"
 	"fmt"
 	"sort"
+	"strings"
 	"testing"
 	"time"
 
@@ -334,6 +335,19 @@ func TestUpgrade(t *testing.T) {
 	require.Equal(t, 1, req.NumRows())
 	require.Equal(t, "False", req.GetRow(0).GetString(0))
 	require.NoError(t, r.Close())
+
+	r = MustExecToRecodeSet(t, se2, "admin show ddl jobs 1000;")
+	req = r.NewChunk(nil)
+	err = r.Next(ctx, req)
+	require.NoError(t, err)
+	rowCnt := req.NumRows()
+	for i := 0; i < rowCnt; i++ {
+		jobType := req.GetRow(i).GetString(3) // get job type.
+		// Should not use multi-schema change in bootstrap DDL because the job arguments may be changed.
+		require.False(t, strings.Contains(jobType, "multi-schema"))
+	}
+	require.NoError(t, r.Close())
+
 	dom.Close()
 }
 
@@ -518,15 +532,6 @@ func TestStmtSummary(t *testing.T) {
 	require.NoError(t, r.Close())
 }
 
-type bindTestStruct struct {
-	originText   string
-	bindText     string
-	db           string
-	originWithDB string
-	bindWithDB   string
-	deleteText   string
-}
-
 func TestUpdateDuplicateBindInfo(t *testing.T) {
 	ctx := context.Background()
 	store, dom := CreateStoreAndBootstrap(t)

pkg/session/mock_bootstrap.go

@@ -66,8 +66,9 @@ var allDDLs = []string{
 	"alter table mock_sys_t alter index idx_v invisible",
 	"alter table mock_sys_partition add partition (partition p6 values less than (8192))",
 	"alter table mock_sys_partition drop partition p6",
-	"alter table mock_sys_t add index mul_idx1(c1), add index mul_idx2(c1)",
-	"alter table mock_sys_t drop index mul_idx1, drop index mul_idx2",
+	// Should not use multi-schema change to add index in bootstrap DDL.
+	// "alter table mock_sys_t add index mul_idx1(c1), add index mul_idx2(c1)",
+	// "alter table mock_sys_t drop index mul_idx1, drop index mul_idx2",
 	// TODO: Support check the DB for ActionAlterPlacementPolicy.
 	// "alter database mock_sys_db_placement placement policy = 'alter_x'",
 	"alter table mock_sys_t add index rename_idx1(c1)",