database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-29 05:21:33 +03:00
Code Activity

Manually merged

Browse Source
This commit is contained in:
evgen@moonbone.local
2005-11-01 19:47:53 +03:00
parent e5f48e13bf 47059b89f5
commit bbe58c7e26
10 changed files with 65 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
sql/sql_update.cc
View File

@ -132,7 +132,7 @@ int mysql_update(THD *thd,
ha_rows updated, found;
key_map old_used_keys;
TABLE *table;
SQL_SELECT *select;
SQL_SELECT *select= 0;
READ_RECORD info;
SELECT_LEX *select_lex= &thd->lex->select_lex;
bool need_reopen;
@ -228,11 +228,20 @@ int mysql_update(THD *thd,
DBUG_RETURN(1); /* purecov: inspected */
}
if (conds)
{
Item::cond_result cond_value;
conds= remove_eq_conds(thd, conds, &cond_value);
if (cond_value == Item::COND_FALSE)
limit= 0; // Impossible WHERE
}
// Don't count on usage of 'only index' when calculating which key to use
table->used_keys.clear_all();
select= make_select(table, 0, 0, conds, 0, &error);
if (error ||
(select && select->check_quick(thd, safe_update, limit)) || !limit)
if (limit)
select=make_select(table,0,0,conds,&error);
if (error || !limit ||
(select && select->check_quick(thd, safe_update, limit)))
{
delete select;
free_underlaid_joins(thd, select_lex);