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Bug#14616 - Freshly imported table returns error 124 when using LIMIT

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Initialized usable_keys from table->keys_in_use instead of ~0
in test_if_skip_sort_order(). It was possible that a disabled
index was used for sorting.


mysql-test/r/myisam.result:
  Bug#14616 - Freshly imported table returns error 124 when using LIMIT
  The test result.
mysql-test/t/myisam.test:
  Bug#14616 - Freshly imported table returns error 124 when using LIMIT
  The test case.
This commit is contained in:
unknown 2005-11-07 12:16:49 +01:00
parent fb4c949f57
commit 5412ee4f29
3 changed files with 28 additions and 2 deletions
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10
mysql-test/r/myisam.result
View file

@ -462,3 +462,13 @@ select count(*) from t1 where a is null;
count(*)
2
drop table t1;
create table t1 (
c1 varchar(32),
key (c1)
) engine=myisam;
alter table t1 disable keys;
insert into t1 values ('a'), ('b');
select c1 from t1 order by c1 limit 1;
c1
a
drop table t1;

12
mysql-test/t/myisam.test
View file

@ -446,3 +446,15 @@ explain select count(*) from t1 where a is null;
select count(*) from t1 where a is null;
drop table t1;
#
# Bug#14616 - Freshly imported table returns error 124 when using LIMIT
#
create table t1 (
c1 varchar(32),
key (c1)
) engine=myisam;
alter table t1 disable keys;
insert into t1 values ('a'), ('b');
select c1 from t1 order by c1 limit 1;
drop table t1;

8
sql/sql_select.cc
View file

@ -6003,8 +6003,12 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit,
key_map usable_keys;
DBUG_ENTER("test_if_skip_sort_order");
/* Check which keys can be used to resolve ORDER BY */
usable_keys= ~(key_map) 0;
/*
Check which keys can be used to resolve ORDER BY.
We must not try to use disabled keys.
*/
usable_keys= table->keys_in_use;
for (ORDER *tmp_order=order; tmp_order ; tmp_order=tmp_order->next)
{
if ((*tmp_order->item)->type() != Item::FIELD_ITEM)