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correct assignment of default limit (BUG#2600)

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This commit is contained in:
bell@sanja.is.com.ua
2004-02-04 15:26:41 +02:00
parent 147afc0ff2
commit b61b8bf2e1
5 changed files with 36 additions and 6 deletions
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11
mysql-test/r/subselect.result
View File

@ -1625,3 +1625,14 @@ PIPPO
1
NULL
DROP TABLE t1, t2;
create table t1 (a int);
insert into t1 values (1), (2), (3);
SET SQL_SELECT_LIMIT=1;
select sum(a) from (select * from t1) as a;
sum(a)
6
select 2 in (select * from t1);
2 in (select * from t1)
1
SET SQL_SELECT_LIMIT=default;
drop table t1;

11
mysql-test/t/subselect.test
View File

@ -1075,3 +1075,14 @@ s.id_cns = cns.id ORDER BY s.anno_dep DESC LIMIT 1) AS PIPPO FROM
t2 AS cns;
DROP TABLE t1, t2;
#
# GLOBAL LIMIT
#
create table t1 (a int);
insert into t1 values (1), (2), (3);
SET SQL_SELECT_LIMIT=1;
select sum(a) from (select * from t1) as a;
select 2 in (select * from t1);
SET SQL_SELECT_LIMIT=default;
drop table t1;

5
sql/sql_lex.cc
View File

@ -1540,8 +1540,9 @@ void st_select_lex::print_limit(THD *thd, String *str)
if (!thd)
thd= current_thd;
if (select_limit != thd->variables.select_limit ||
select_limit != HA_POS_ERROR ||
if ((select_limit != thd->variables.select_limit &&
this == &thd->lex->select_lex) ||
(select_limit != HA_POS_ERROR && this != &thd->lex->select_lex) ||
offset_limit != 0L)
{
str->append(" limit ", 7);

8
sql/sql_parse.cc
View File

@ -3758,7 +3758,9 @@ mysql_init_select(LEX *lex)
{
SELECT_LEX *select_lex= lex->current_select;
select_lex->init_select();
select_lex->select_limit= lex->thd->variables.select_limit;
select_lex->select_limit= (&lex->select_lex == select_lex) ?
lex->thd->variables.select_limit : /* Primry UNION */
HA_POS_ERROR; /* subquery */
if (select_lex == &lex->select_lex)
{
lex->exchange= 0;
@ -3810,7 +3812,9 @@ mysql_new_select(LEX *lex, bool move_down)
fake->select_number= INT_MAX;
fake->make_empty_select();
fake->linkage= GLOBAL_OPTIONS_TYPE;
fake->select_limit= lex->thd->variables.select_limit;
fake->select_limit= (&lex->unit == unit) ?
lex->thd->variables.select_limit : /* Primry UNION */
HA_POS_ERROR; /* subquery */
}
}

7
sql/sql_yacc.yy
View File

@ -3476,9 +3476,12 @@ order_dir:
opt_limit_clause_init:
/* empty */
{
SELECT_LEX *sel= Select;
LEX *lex= Lex;
SELECT_LEX *sel= lex->current_select;
sel->offset_limit= 0L;
sel->select_limit= Lex->thd->variables.select_limit;
sel->select_limit= (&lex->select_lex == sel) ?
Lex->thd->variables.select_limit : /* primary SELECT */
HA_POS_ERROR; /* subquery */
}
| limit_clause {}
;