ddl: fix create table with like bug when refer table has non-public c…

…olumn/index (#9580)

ddl/db_test.go

@@ -1659,6 +1659,71 @@ func (s *testDBSuite) TestCreateTableWithLike(c *C) {
 	s.tk.MustExec("drop database ctwl_db1")
 }
 
+// TestCreateTableWithLike2 tests create table with like when refer table have non-public column/index.
+func (s *testDBSuite) TestCreateTableWithLike2(c *C) {
+	s.tk = testkit.NewTestKit(c, s.store)
+	s.tk.MustExec("use test_db")
+	s.tk.MustExec("drop table if exists t1,t2;")
+	defer s.tk.MustExec("drop table if exists t1,t2;")
+	s.tk.MustExec("create table t1 (a int, b int, c int, index idx1(c));")
+
+	tbl1 := testGetTableByName(c, s.s, "test_db", "t1")
+	doneCh := make(chan error, 2)
+	hook := &ddl.TestDDLCallback{}
+	hook.OnJobRunBeforeExported = func(job *model.Job) {
+		if job.Type != model.ActionAddColumn && job.Type != model.ActionDropColumn && job.Type != model.ActionAddIndex && job.Type != model.ActionDropIndex {
+			return
+		}
+		if job.TableID != tbl1.Meta().ID {
+			return
+		}
+		if job.SchemaState == model.StateDeleteOnly {
+			go backgroundExec(s.store, "create table t2 like t1", doneCh)
+		}
+	}
+	originalHook := s.dom.DDL().GetHook()
+	defer s.dom.DDL().(ddl.DDLForTest).SetHook(originalHook)
+	s.dom.DDL().(ddl.DDLForTest).SetHook(hook)
+
+	// create table when refer table add column
+	s.tk.MustExec("alter table t1 add column d int")
+	checkTbl2 := func() {
+		err := <-doneCh
+		c.Assert(err, IsNil)
+		s.tk.MustExec("alter table t2 add column e int")
+		t2Info := testGetTableByName(c, s.s, "test_db", "t2")
+		c.Assert(len(t2Info.Meta().Columns), Equals, 4)
+		c.Assert(len(t2Info.Meta().Columns), Equals, len(t2Info.Cols()))
+	}
+	checkTbl2()
+
+	// create table when refer table drop column
+	s.tk.MustExec("drop table t2;")
+	s.tk.MustExec("alter table t1 drop column b;")
+	checkTbl2()
+
+	// create table when refer table add index
+	s.tk.MustExec("drop table t2;")
+	s.tk.MustExec("alter table t1 add index idx2(a);")
+	checkTbl2 = func() {
+		err := <-doneCh
+		c.Assert(err, IsNil)
+		s.tk.MustExec("alter table t2 add column e int")
+		tbl2 := testGetTableByName(c, s.s, "test_db", "t2")
+		c.Assert(len(tbl2.Meta().Columns), Equals, 4)
+		c.Assert(len(tbl2.Meta().Columns), Equals, len(tbl2.Cols()))
+		c.Assert(len(tbl2.Meta().Indices), Equals, 1)
+		c.Assert(tbl2.Meta().Indices[0].Name.L, Equals, "idx1")
+	}
+	checkTbl2()
+
+	// create table when refer table drop index.
+	s.tk.MustExec("drop table t2;")
+	s.tk.MustExec("alter table t1 drop index idx2;")
+	checkTbl2()
+
+}
+
 func (s *testDBSuite) TestCreateTable(c *C) {
 	s.tk.MustExec("use test")
 	s.tk.MustExec("CREATE TABLE `t` (`a` double DEFAULT 1.0 DEFAULT now() DEFAULT 2.0 );")

ddl/ddl_api.go

@@ -1008,10 +1008,7 @@ func (d *ddl) CreateTableWithLike(ctx sessionctx.Context, ident, referIdent ast.
 		return infoschema.ErrTableExists.GenWithStackByArgs(ident)
 	}
 
-	tblInfo := *referTbl.Meta()
-	tblInfo.Name = ident.Name
-	tblInfo.AutoIncID = 0
-	tblInfo.ForeignKeys = nil
+	tblInfo := buildTableInfoWithLike(ident, referTbl.Meta())
 	tblInfo.ID, err = d.genGlobalID()
 	if err != nil {
 		return errors.Trace(err)
@@ -1029,6 +1026,24 @@ func (d *ddl) CreateTableWithLike(ctx sessionctx.Context, ident, referIdent ast.
 	return errors.Trace(err)
 }
 
+func buildTableInfoWithLike(ident ast.Ident, referTblInfo *model.TableInfo) model.TableInfo {
+	tblInfo := *referTblInfo
+	// Check non-public column and adjust column offset.
+	newColumns := referTblInfo.Cols()
+	newIndices := make([]*model.IndexInfo, 0, len(tblInfo.Indices))
+	for _, idx := range tblInfo.Indices {
+		if idx.State == model.StatePublic {
+			newIndices = append(newIndices, idx)
+		}
+	}
+	tblInfo.Columns = newColumns
+	tblInfo.Indices = newIndices
+	tblInfo.Name = ident.Name
+	tblInfo.AutoIncID = 0
+	tblInfo.ForeignKeys = nil
+	return tblInfo
+}
+
 // BuildTableInfoFromAST builds model.TableInfo from a SQL statement.
 // The SQL string should be a create table statement.
 // Don't use this function to build a partitioned table.