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Merge epotemkin@bk-internal.mysql.com:/home/bk/mysql-4.1

Browse source 
into moonbone.local:/work/14186-bug-4.1-mysql
This commit is contained in:
evgen@moonbone.local 2005-11-01 17:34:19 +03:00
commit 47059b89f5
5 changed files with 31 additions and 7 deletions
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8
mysql-test/r/update.result
View file

@ -337,3 +337,11 @@ a b
22 3
23 3
drop table t1;
create table t1 (f1 date not null);
insert into t1 values('2000-01-01'),('0000-00-00');
update t1 set f1='2002-02-02' where f1 is null;
select * from t1;
f1
2000-01-01
2002-02-02
drop table t1;

9
mysql-test/t/update.test
View file

@ -260,5 +260,14 @@ update t1 set a=a+11,b=2 order by a limit 3;
update t1 set a=a+12,b=3 order by a limit 3;
select * from t1 order by a;
drop table t1;
#
# Bug#14186 select datefield is null not updated
#
create table t1 (f1 date not null);
insert into t1 values('2000-01-01'),('0000-00-00');
update t1 set f1='2002-02-02' where f1 is null;
select * from t1;
drop table t1;
# End of 4.1 tests

4
sql/sql_select.cc
View file

@ -69,8 +69,6 @@ static int return_zero_rows(JOIN *join, select_result *res,TABLE_LIST *tables,
SELECT_LEX_UNIT *unit);
static COND *optimize_cond(THD *thd, COND *conds,
Item::cond_result *cond_value);
static COND *remove_eq_conds(THD *thd, COND *cond,
Item::cond_result *cond_value);
static bool const_expression_in_where(COND *conds,Item *item, Item **comp_item);
static bool open_tmp_table(TABLE *table);
static bool create_myisam_tmp_table(TABLE *table,TMP_TABLE_PARAM *param,
@ -4615,7 +4613,7 @@ optimize_cond(THD *thd, COND *conds, Item::cond_result *cond_value)
COND_FALSE always false ( 1 = 2 )
*/
static COND *
COND *
remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value)
{
if (cond->type() == Item::COND_ITEM)

1
sql/sql_select.h
View file

@ -457,3 +457,4 @@ bool cp_buffer_from_ref(THD *thd, TABLE_REF *ref);
bool error_if_full_join(JOIN *join);
int report_error(TABLE *table, int error);
int safe_index_read(JOIN_TAB *tab);
COND *remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value);

16
sql/sql_update.cc
View file

@ -70,7 +70,7 @@ 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;
TABLE_LIST *update_table_list= ((TABLE_LIST*)
thd->lex->select_lex.table_list.first);
@ -131,11 +131,19 @@ 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,&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, &thd->lex->select_lex);