executor: fix format of bit default value on INFORMATION_SCHEMA.COLUM…

…NS (#32701)

close #32655

executor/infoschema_reader.go

@@ -792,6 +792,11 @@ ForColumnsTag:
 		var columnDefault interface{}
 		if columnDesc.DefaultValue != nil {
 			columnDefault = fmt.Sprintf("%v", columnDesc.DefaultValue)
+			if col.Tp == mysql.TypeBit {
+				defaultStr := fmt.Sprintf("%v", columnDesc.DefaultValue)
+				defaultValBinaryLiteral := types.BinaryLiteral(defaultStr)
+				columnDefault = defaultValBinaryLiteral.ToBitLiteralString(true)
+			}
 		}
 		record := types.MakeDatums(
 			infoschema.CatalogVal,                // TABLE_CATALOG

executor/infoschema_reader_test.go

@@ -150,6 +150,18 @@ func TestViews(t *testing.T) {
 	tk.MustQuery("SELECT table_catalog, table_schema, table_name, table_type, engine, version, row_format, table_rows, avg_row_length, data_length, max_data_length, index_length, data_free, auto_increment, update_time, check_time, table_collation, checksum, create_options, table_comment FROM information_schema.tables WHERE table_schema='test' AND table_name='v1'").Check(testkit.Rows("def test v1 VIEW <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> VIEW"))
 }
 
+func TestColumnsTables(t *testing.T) {
+	store, clean := testkit.CreateMockStore(t)
+	defer clean()
+	tk := testkit.NewTestKit(t, store)
+	tk.MustExec("use test")
+	tk.MustExec("drop table if exists t")
+	tk.MustExec("create table t (bit bit(10) DEFAULT b'100')")
+	tk.MustQuery("SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 't'").Check(testkit.Rows(
+		"def test t bit 1 b'100' YES bit <nil> <nil> 10 0 <nil> <nil> <nil> bit(10) unsigned   select,insert,update,references  "))
+	tk.MustExec("drop table if exists t")
+}
+
 func TestEngines(t *testing.T) {
 	store, clean := testkit.CreateMockStore(t)
 	defer clean()