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BUG#49902 - SELECT returns incorrect results

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Queries optimized with GROUP_MIN_MAX didn't cleanup KEYREAD
optimization properly. As a result subsequent queries may
return incomplete rows (fields are initialized to default
values).
This commit is contained in:
Sergey Vojtovich
2010-02-09 12:53:13 +04:00
parent 73cfad9ff4
commit 06fb46a029
8 changed files with 62 additions and 87 deletions
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9
sql/sql_update.cc
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@ -397,10 +397,7 @@ int mysql_update(THD *thd,
matching rows before updating the table!
*/
if (used_index < MAX_KEY && old_covering_keys.is_set(used_index))
{
table->key_read=1;
table->mark_columns_used_by_index(used_index);
}
else
{
table->use_all_columns();
@ -844,11 +841,7 @@ int mysql_update(THD *thd,
err:
delete select;
free_underlaid_joins(thd, select_lex);
if (table->key_read)
{
table->key_read=0;
table->file->extra(HA_EXTRA_NO_KEYREAD);
}
table->set_keyread(FALSE);
thd->abort_on_warning= 0;
DBUG_RETURN(1);
}