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ddl, executor: fix rename table compatibility (#8709) #8809

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Dec 25, 2018
Merged

ddl, executor: fix rename table compatibility (#8709) #8809

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4546161
ddl, executor: fix rename table compatibility (#8709)
zimulala Dec 22, 2018
2b47db9
*: make fmt happy
zimulala Dec 25, 2018
82c374a
Merge branch 'release-2.0' into rename-table-2.0
crazycs520 Dec 25, 2018
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2 changes: 1 addition & 1 deletion ddl/ddl.go
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Original file line number Diff line number Diff line change
Expand Up @@ -166,7 +166,7 @@ type DDL interface {
GetInformationSchema() infoschema.InfoSchema
AlterTable(ctx sessionctx.Context, tableIdent ast.Ident, spec []*ast.AlterTableSpec) error
TruncateTable(ctx sessionctx.Context, tableIdent ast.Ident) error
RenameTable(ctx sessionctx.Context, oldTableIdent, newTableIdent ast.Ident) error
RenameTable(ctx sessionctx.Context, oldTableIdent, newTableIdent ast.Ident, isAlterTable bool) error
// SetLease will reset the lease time for online DDL change,
// it's a very dangerous function and you must guarantee that all servers have the same lease time.
SetLease(ctx context.Context, lease time.Duration)
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9 changes: 7 additions & 2 deletions ddl/ddl_api.go
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Original file line number Diff line number Diff line change
Expand Up @@ -994,7 +994,8 @@ func (d *ddl) AlterTable(ctx sessionctx.Context, ident ast.Ident, specs []*ast.A
err = d.AlterColumn(ctx, ident, spec)
case ast.AlterTableRenameTable:
newIdent := ast.Ident{Schema: spec.NewTable.Schema, Name: spec.NewTable.Name}
err = d.RenameTable(ctx, ident, newIdent)
isAlterTable := true
err = d.RenameTable(ctx, ident, newIdent, isAlterTable)
case ast.AlterTableDropPrimaryKey:
err = ErrUnsupportedModifyPrimaryKey.GenByArgs("drop")
case ast.AlterTableOption:
Expand Down Expand Up @@ -1619,7 +1620,7 @@ func (d *ddl) TruncateTable(ctx sessionctx.Context, ti ast.Ident) error {
return errors.Trace(err)
}

func (d *ddl) RenameTable(ctx sessionctx.Context, oldIdent, newIdent ast.Ident) error {
func (d *ddl) RenameTable(ctx sessionctx.Context, oldIdent, newIdent ast.Ident, isAlterTable bool) error {
is := d.GetInformationSchema()
oldSchema, ok := is.SchemaByName(oldIdent.Schema)
if !ok {
Expand All @@ -1629,6 +1630,10 @@ func (d *ddl) RenameTable(ctx sessionctx.Context, oldIdent, newIdent ast.Ident)
if err != nil {
return errFileNotFound.GenByArgs(oldIdent.Schema, oldIdent.Name)
}
if isAlterTable && newIdent.Schema.L == oldIdent.Schema.L && newIdent.Name.L == oldIdent.Name.L {
// oldIdent is equal to newIdent, do nothing
return nil
}
newSchema, ok := is.SchemaByName(newIdent.Schema)
if !ok {
return errErrorOnRename.GenByArgs(oldIdent.Schema, oldIdent.Name, newIdent.Schema, newIdent.Name)
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22 changes: 17 additions & 5 deletions ddl/ddl_db_test.go
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Expand Up @@ -1609,14 +1609,16 @@ func (s *testDBSuite) TestTruncateTable(c *C) {
}

func (s *testDBSuite) TestRenameTable(c *C) {
s.testRenameTable(c, "rename table %s to %s")
isAlterTable := false
s.testRenameTable(c, "rename table %s to %s", isAlterTable)
}

func (s *testDBSuite) TestAlterTableRenameTable(c *C) {
s.testRenameTable(c, "alter table %s rename to %s")
isAlterTable := true
s.testRenameTable(c, "alter table %s rename to %s", isAlterTable)
}

func (s *testDBSuite) testRenameTable(c *C, sql string) {
func (s *testDBSuite) testRenameTable(c *C, sql string, isAlterTable bool) {
s.tk = testkit.NewTestKit(c, s.store)
s.tk.MustExec("use test")
// for different databases
Expand Down Expand Up @@ -1659,8 +1661,18 @@ func (s *testDBSuite) testRenameTable(c *C, sql string) {
s.testErrorCode(c, failSQL, tmysql.ErrFileNotFound)
failSQL = fmt.Sprintf(sql, "test1.t2", "test_not_exist.t")
s.testErrorCode(c, failSQL, tmysql.ErrErrorOnRename)
failSQL = fmt.Sprintf(sql, "test1.t2", "test1.t2")
s.testErrorCode(c, failSQL, tmysql.ErrTableExists)

// for the same table name
s.tk.MustExec("use test1")
s.tk.MustExec("create table if not exists t (c1 int, c2 int)")
s.tk.MustExec("create table if not exists t1 (c1 int, c2 int)")
if isAlterTable {
s.tk.MustExec(fmt.Sprintf(sql, "test1.t", "t"))
s.tk.MustExec(fmt.Sprintf(sql, "test1.t1", "test1.T1"))
} else {
s.testErrorCode(c, fmt.Sprintf(sql, "test1.t", "t"), tmysql.ErrTableExists)
s.testErrorCode(c, fmt.Sprintf(sql, "test1.t1", "test1.T1"), tmysql.ErrTableExists)
}

s.tk.MustExec("drop database test1")
}
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3 changes: 2 additions & 1 deletion executor/ddl.go
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Expand Up @@ -93,7 +93,8 @@ func (e *DDLExec) executeRenameTable(s *ast.RenameTableStmt) error {
}
oldIdent := ast.Ident{Schema: s.OldTable.Schema, Name: s.OldTable.Name}
newIdent := ast.Ident{Schema: s.NewTable.Schema, Name: s.NewTable.Name}
err := domain.GetDomain(e.ctx).DDL().RenameTable(e.ctx, oldIdent, newIdent)
isAlterTable := false
err := domain.GetDomain(e.ctx).DDL().RenameTable(e.ctx, oldIdent, newIdent, isAlterTable)
return errors.Trace(err)
}

Expand Down