address comments

Author: ciscoxll

ddl/db_test.go

@@ -2133,25 +2133,30 @@ func (s *testDBSuite) TestCheckColumnCantHaveDefaultValue(c *C) {
 	s.tk.MustExec("set sql_mode='';")
 	s.tk.MustExec("drop table if exists text_default_text;")
 	s.tk.MustExec("create table text_default_text(c1 text not null default '');")
-	ctx := s.tk.Se.(sessionctx.Context)
-	is := domain.GetDomain(ctx).InfoSchema()
-	tblInfo, err := is.TableByName(model.NewCIStr("test"), model.NewCIStr("text_default_text"))
-	c.Assert(err, IsNil)
-	c.Assert(tblInfo.Meta().Columns[0].DefaultValue, Equals, "")
+	s.tk.MustQuery(`show create table text_default_text`).Check(testutil.RowsWithSep("|",
+		""+
+			"text_default_text CREATE TABLE `text_default_text` (\n"+
+			"  `c1` text NOT NULL\n"+
+			") ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin",
+	))
 
 	s.tk.MustExec("drop table if exists text_default_blob;")
 	s.tk.MustExec("create table text_default_blob(c1 blob not null default '');")
-	is = domain.GetDomain(ctx).InfoSchema()
-	tblInfo, err = is.TableByName(model.NewCIStr("test"), model.NewCIStr("text_default_blob"))
-	c.Assert(err, IsNil)
-	c.Assert(tblInfo.Meta().Columns[0].DefaultValue, Equals, "")
+	s.tk.MustQuery(`show create table text_default_blob`).Check(testutil.RowsWithSep("|",
+		""+
+			"text_default_blob CREATE TABLE `text_default_blob` (\n"+
+			"  `c1` blob NOT NULL\n"+
+			") ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin",
+	))
 
 	s.tk.MustExec("drop table if exists text_default_json;")
 	s.tk.MustExec("create table text_default_json(c1 json not null default '');")
-	is = domain.GetDomain(ctx).InfoSchema()
-	tblInfo, err = is.TableByName(model.NewCIStr("test"), model.NewCIStr("text_default_json"))
-	c.Assert(err, IsNil)
-	c.Assert(tblInfo.Meta().Columns[0].DefaultValue, Equals, `null`)
+	s.tk.MustQuery(`show create table text_default_json`).Check(testutil.RowsWithSep("|",
+		""+
+			"text_default_json CREATE TABLE `text_default_json` (\n"+
+			"  `c1` json NOT NULL DEFAULT 'null'\n"+
+			") ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin",
+	))
 }
 
 func (s *testDBSuite) TestCharacterSetInColumns(c *C) {