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Merge 5.3->5.5

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This commit is contained in:
Igor Babaev
2013-08-21 11:27:02 -07:00
parent c97ae6b56f 99992f6ec4
commit 5d5f3a1ee8
4 changed files with 64 additions and 2 deletions
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30
mysql-test/r/null.result
View File

@ -343,3 +343,33 @@ Field Type Null Key Default Extra
IFNULL(NULL, b) decimal(1,0) YES NULL
DROP TABLE t1, t2;
# End of 5.0 tests
#
# MDEV-4895 Valgrind warnings (Conditional jump or move depends on uninitialised value) in Field_datetime::get_date on GREATEST(..) IS NULL
#
CREATE TABLE t1 (dt DATETIME NOT NULL);
INSERT INTO t1 VALUES (NOW()),(NOW());
EXPLAIN
SELECT * FROM t1 WHERE concat( dt, '2012-12-21 12:12:12' ) IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
SELECT * FROM t1 WHERE concat( dt, '2012-12-21 12:12:12' ) IS NULL;
dt
DROP TABLE t1;
CREATE TABLE t1 (dt INT NOT NULL);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN
SELECT * FROM t1 WHERE concat( dt, '1' ) IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
SELECT * FROM t1 WHERE concat( dt, '1' ) IS NULL;
dt
DROP TABLE t1;
CREATE TABLE t1 (dt INT NOT NULL);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN
SELECT * FROM t1 WHERE NOT (concat( dt, '1' ) IS NOT NULL);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
SELECT * FROM t1 WHERE NOT (concat( dt, '1' ) IS NOT NULL);
dt
DROP TABLE t1;

28
mysql-test/t/null.test
View File

@ -255,3 +255,31 @@ DESCRIBE t2;
DROP TABLE t1, t2;
--echo # End of 5.0 tests
--echo #
--echo # MDEV-4895 Valgrind warnings (Conditional jump or move depends on uninitialised value) in Field_datetime::get_date on GREATEST(..) IS NULL
--echo #
CREATE TABLE t1 (dt DATETIME NOT NULL);
INSERT INTO t1 VALUES (NOW()),(NOW());
EXPLAIN
SELECT * FROM t1 WHERE concat( dt, '2012-12-21 12:12:12' ) IS NULL;
SELECT * FROM t1 WHERE concat( dt, '2012-12-21 12:12:12' ) IS NULL;
DROP TABLE t1;
CREATE TABLE t1 (dt INT NOT NULL);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN
SELECT * FROM t1 WHERE concat( dt, '1' ) IS NULL;
SELECT * FROM t1 WHERE concat( dt, '1' ) IS NULL;
DROP TABLE t1;
CREATE TABLE t1 (dt INT NOT NULL);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN
SELECT * FROM t1 WHERE NOT (concat( dt, '1' ) IS NOT NULL);
SELECT * FROM t1 WHERE NOT (concat( dt, '1' ) IS NOT NULL);
DROP TABLE t1;

4
sql/item_cmpfunc.cc
View File

@ -4748,6 +4748,8 @@ Item *and_expressions(Item *a, Item *b, Item **org_item)
longlong Item_func_isnull::val_int()
{
DBUG_ASSERT(fixed == 1);
if (const_item() && !args[0]->maybe_null)
return 0;
return args[0]->is_null() ? 1: 0;
}
@ -4755,6 +4757,8 @@ longlong Item_is_not_null_test::val_int()
{
DBUG_ASSERT(fixed == 1);
DBUG_ENTER("Item_is_not_null_test::val_int");
if (const_item() && !args[0]->maybe_null)
DBUG_RETURN(1);
if (args[0]->is_null())
{
DBUG_PRINT("info", ("null"));

4
sql/sql_select.cc
View File

@ -13748,7 +13748,7 @@ internal_remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value)
Propagate the newly formed multiple equalities to
the all AND/OR levels of cond
*/
bool is_simplifiable_cond= true;
bool is_simplifiable_cond= false;
propagate_new_equalities(thd, cond, cond_equalities,
cond_equal->upper_levels,
&is_simplifiable_cond);
@ -13759,7 +13759,7 @@ internal_remove_eq_conds(THD *thd, COND *cond, Item::cond_result *cond_value)
*/
if (is_simplifiable_cond)
{
if (!(cond= remove_eq_conds(thd, cond, cond_value)))
if (!(cond= internal_remove_eq_conds(thd, cond, cond_value)))
return cond;
}
}