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parser: fix cast function restore #40129

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merged 1 commit into from
Dec 23, 2022
Merged

parser: fix cast function restore #40129

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1 change: 1 addition & 0 deletions parser/parser_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -3244,6 +3244,7 @@ func TestDDL(t *testing.T) {
{"create table t (a bigint, b bigint as (a+1) not null);", true, "CREATE TABLE `t` (`a` BIGINT,`b` BIGINT GENERATED ALWAYS AS(`a`+1) VIRTUAL NOT NULL)"},
{"create table t (a bigint, b bigint as (a+1) not null);", true, "CREATE TABLE `t` (`a` BIGINT,`b` BIGINT GENERATED ALWAYS AS(`a`+1) VIRTUAL NOT NULL)"},
{"create table t (a bigint, b bigint as (a+1) not null comment 'ttt');", true, "CREATE TABLE `t` (`a` BIGINT,`b` BIGINT GENERATED ALWAYS AS(`a`+1) VIRTUAL NOT NULL COMMENT 'ttt')"},
{"create table t(a int, index idx((cast(a as binary(1)))));", true, "CREATE TABLE `t` (`a` INT,INDEX `idx`((CAST(`a` AS BINARY(1)))))"},
{"alter table t add column (f timestamp as (a+1) default '2019-01-01 11:11:11');", false, ""},
{"alter table t modify column f int as (a+1) default 55;", false, ""},

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2 changes: 1 addition & 1 deletion parser/types/field_type.go
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Expand Up @@ -518,7 +518,7 @@ func (ft *FieldType) Restore(ctx *format.RestoreCtx) error {
// RestoreAsCastType is used for write AST back to string.
func (ft *FieldType) RestoreAsCastType(ctx *format.RestoreCtx, explicitCharset bool) {
switch ft.tp {
case mysql.TypeVarString:
case mysql.TypeVarString, mysql.TypeString:
skipWriteBinary := false
if ft.charset == charset.CharsetBin && ft.collate == charset.CollationBin {
ctx.WriteKeyWord("BINARY")
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