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MDEV-438 Microseconds: Precision is ignored in CURRENT_TIMESTAMP(N) when it is given as a default column value

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For MySQL 5.6 compatibility, support precision specification in CURRENT_TIMESTAMP in
a default clause, when it's not less than the column's precision.
This commit is contained in:
Sergei Golubchik
2012-12-17 20:47:23 +01:00
parent cb7f5948ec
commit 1d2b11b291
4 changed files with 51 additions and 5 deletions
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20
mysql-test/r/type_timestamp_hires.result
View File

@ -278,3 +278,23 @@ select * from t1;
a
2011-01-01 01:01:01.12345
drop table t1;
create table t1 (a timestamp(5) default current_timestamp);
drop table t1;
create table t1 (a timestamp(5) default current_timestamp());
drop table t1;
create table t1 (a timestamp(5) default current_timestamp(2));
ERROR 42000: Invalid default value for 'a'
create table t1 (a timestamp(5) default current_timestamp(5));
drop table t1;
create table t1 (a timestamp(5) default current_timestamp(6));
drop table t1;
create table t1 (a timestamp(5) on update current_timestamp);
drop table t1;
create table t1 (a timestamp(5) on update current_timestamp());
drop table t1;
create table t1 (a timestamp(5) on update current_timestamp(3));
ERROR HY000: Invalid ON UPDATE clause for 'a' column
create table t1 (a timestamp(5) on update current_timestamp(5));
drop table t1;
create table t1 (a timestamp(5) on update current_timestamp(6));
drop table t1;

15
mysql-test/t/type_timestamp_hires.test
View File

@ -14,3 +14,18 @@ insert t1 values ();
select * from t1;
drop table t1;
#
# MDEV-438 Microseconds: Precision is ignored in CURRENT_TIMESTAMP(N) when it is given as a default column value
#
create table t1 (a timestamp(5) default current_timestamp); drop table t1;
create table t1 (a timestamp(5) default current_timestamp()); drop table t1;
--error ER_INVALID_DEFAULT
create table t1 (a timestamp(5) default current_timestamp(2));
create table t1 (a timestamp(5) default current_timestamp(5)); drop table t1;
create table t1 (a timestamp(5) default current_timestamp(6)); drop table t1;
create table t1 (a timestamp(5) on update current_timestamp); drop table t1;
create table t1 (a timestamp(5) on update current_timestamp()); drop table t1;
--error ER_INVALID_ON_UPDATE
create table t1 (a timestamp(5) on update current_timestamp(3));
create table t1 (a timestamp(5) on update current_timestamp(5)); drop table t1;
create table t1 (a timestamp(5) on update current_timestamp(6)); drop table t1;

10
sql/sql_parse.cc
View File

@ -5955,6 +5955,7 @@ bool add_field_to_list(THD *thd, LEX_STRING *field_name, enum_field_types type,
{
register Create_field *new_field;
LEX *lex= thd->lex;
uint8 datetime_precision= length ? atoi(length) : 0;
DBUG_ENTER("add_field_to_list");
if (check_string_char_length(field_name, "", NAME_CHAR_LEN,
@ -5994,8 +5995,10 @@ bool add_field_to_list(THD *thd, LEX_STRING *field_name, enum_field_types type,
NOW() as default for TIMESTAMP and DATETIME type.
*/
if (default_value->type() == Item::FUNC_ITEM &&
!(((Item_func*)default_value)->functype() == Item_func::NOW_FUNC &&
(type == MYSQL_TYPE_TIMESTAMP || type == MYSQL_TYPE_DATETIME)))
(static_cast<Item_func*>(default_value)->functype() !=
Item_func::NOW_FUNC ||
(mysql_type_to_time_type(type) != MYSQL_TIMESTAMP_DATETIME) ||
default_value->decimals < datetime_precision))
{
my_error(ER_INVALID_DEFAULT, MYF(0), field_name->str);
DBUG_RETURN(1);
@ -6018,7 +6021,8 @@ bool add_field_to_list(THD *thd, LEX_STRING *field_name, enum_field_types type,
}
if (on_update_value &&
!(type == MYSQL_TYPE_TIMESTAMP || type == MYSQL_TYPE_DATETIME))
(mysql_type_to_time_type(type) != MYSQL_TIMESTAMP_DATETIME ||
on_update_value->decimals < datetime_precision))
{
my_error(ER_INVALID_ON_UPDATE, MYF(0), field_name->str);
DBUG_RETURN(1);

11
sql/sql_yacc.yy
View File

@ -1483,6 +1483,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize);
ev_alter_on_schedule_completion opt_ev_rename_to opt_ev_sql_stmt
optional_flush_tables_arguments opt_dyncol_type dyncol_type
opt_time_precision kill_type kill_option int_num
opt_default_time_precision
%type <m_yes_no_unk>
opt_chain opt_release
@ -5898,7 +5899,7 @@ attribute:
NULL_SYM { Lex->type&= ~ NOT_NULL_FLAG; }
| not NULL_SYM { Lex->type|= NOT_NULL_FLAG; }
| DEFAULT now_or_signed_literal { Lex->default_value=$2; }
| ON UPDATE_SYM NOW_SYM opt_time_precision
| ON UPDATE_SYM NOW_SYM opt_default_time_precision
{
Item *item= new (YYTHD->mem_root) Item_func_now_local($4);
if (item == NULL)
@ -5992,7 +5993,7 @@ type_with_opt_collate:
now_or_signed_literal:
NOW_SYM opt_time_precision
NOW_SYM opt_default_time_precision
{
$$= new (YYTHD->mem_root) Item_func_now_local($2);
if ($$ == NULL)
@ -7782,6 +7783,12 @@ select_alias:
| TEXT_STRING_sys { $$=$1; }
;
opt_default_time_precision:
/* empty */ { $$= NOT_FIXED_DEC; }
| '(' ')' { $$= NOT_FIXED_DEC; }
| '(' real_ulong_num ')' { $$= $2; };
;
opt_time_precision:
/* empty */ { $$= 0; }
| '(' ')' { $$= 0; }