EVOLUTION-MANAGER

Edit File: func_isnull.result

drop table if exists t1; create table t1 (id int auto_increment primary key not null, mydate date not null); insert into t1 values (0,"2002-05-01"),(0,"2002-05-01"),(0,"2002-05-01"); flush tables; select * from t1 where isnull(to_days(mydate)); id mydate drop table t1; # # Bug#53933 crash when using uncacheable subquery in the having clause of outer query # CREATE TABLE t1 (f1 INT); INSERT INTO t1 VALUES (0),(0); SELECT ISNULL((SELECT GET_LOCK('Bug#53933', 0) FROM t1 GROUP BY f1)) AS f2 FROM t1 GROUP BY f1 HAVING f2 = f2; f2 0 SELECT RELEASE_LOCK('Bug#53933'); RELEASE_LOCK('Bug#53933') 1 DROP TABLE t1; End of 5.0 tests CREATE TABLE t1 (id INTEGER UNSIGNED NOT NULL AUTO_INCREMENT, PRIMARY KEY(id)); INSERT INTO t1( id ) VALUES ( NULL ); SELECT t1.id FROM t1 WHERE (id is not null and id is null ); id DROP TABLE t1; # End of 5.1 tests # # MDEV-14911: IS NULL for field from mergeable view # CREATE TABLE t1 (d1 datetime NOT NULL); INSERT INTO t1 VALUES ('0000-00-00 00:00:00'), ('0000-00-00 00:00:00'), ('1979-09-03 20:49:36'); SELECT * FROM t1; d1 0000-00-00 00:00:00 0000-00-00 00:00:00 1979-09-03 20:49:36 SELECT * FROM t1 WHERE d1 IS NULL; d1 0000-00-00 00:00:00 0000-00-00 00:00:00 EXPLAIN EXTENDED SELECT * FROM t1 WHERE d1 IS NULL; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`d1` AS `d1` from `test`.`t1` where `test`.`t1`.`d1` = 0 SELECT count(*) FROM t1 WHERE d1 IS NULL; count(*) 2 CREATE VIEW v1 AS (SELECT * FROM t1); SELECT * FROM v1; d1 0000-00-00 00:00:00 0000-00-00 00:00:00 1979-09-03 20:49:36 SELECT * FROM v1 WHERE d1 IS NULL; d1 0000-00-00 00:00:00 0000-00-00 00:00:00 EXPLAIN EXTENDED SELECT * FROM v1 WHERE d1 IS NULL; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`d1` AS `d1` from `test`.`t1` where `test`.`t1`.`d1` = 0 SELECT count(*) FROM v1 WHERE d1 IS NULL; count(*) 2 SET @save_optimizer_switch=@@optimizer_switch; SET SESSION optimizer_switch='derived_merge=off'; SELECT count(*) FROM ( SELECT * FROM t1 ) AS a1 WHERE d1 IS NULL; count(*) 2 SET SESSION optimizer_switch='derived_merge=on'; SELECT count(*) FROM ( SELECT * FROM t1 ) AS a1 WHERE d1 IS NULL; count(*) 2 SET optimizer_switch=@save_optimizer_switch; CREATE TABLE t2 (d1 datetime NOT NULL); INSERT INTO t2 VALUES ('1980-09-03 20:49:36'), ('0000-00-00 00:00:00'), ('1979-09-03 20:49:36'); SELECT * FROM t2 LEFT JOIN t1 ON t2.d1=t1.d1 WHERE t1.d1 IS NULL; d1 d1 0000-00-00 00:00:00 0000-00-00 00:00:00 0000-00-00 00:00:00 0000-00-00 00:00:00 1980-09-03 20:49:36 NULL EXPLAIN EXTENDED SELECT * FROM t2 LEFT JOIN t1 ON t2.d1=t1.d1 WHERE t1.d1 IS NULL; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`d1` AS `d1`,`test`.`t1`.`d1` AS `d1` from `test`.`t2` left join `test`.`t1` on(`test`.`t1`.`d1` = `test`.`t2`.`d1`) where `test`.`t1`.`d1` = 0 or `test`.`t1`.`d1` is null SELECT * FROM t2 LEFT JOIN v1 ON t2.d1=v1.d1 WHERE v1.d1 IS NULL; d1 d1 0000-00-00 00:00:00 0000-00-00 00:00:00 0000-00-00 00:00:00 0000-00-00 00:00:00 1980-09-03 20:49:36 NULL EXPLAIN EXTENDED SELECT * FROM t2 LEFT JOIN v1 ON t2.d1=v1.d1 WHERE v1.d1 IS NULL; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t2`.`d1` AS `d1`,`test`.`t1`.`d1` AS `d1` from `test`.`t2` left join (`test`.`t1`) on(`test`.`t1`.`d1` = `test`.`t2`.`d1`) where `test`.`t1`.`d1` = 0 or `test`.`t1`.`d1` is null DROP VIEW v1; DROP TABLE t1,t2; # # MDEV-15475: Assertion `!table || (!table->read_set || # bitmap_is_set(table->read_set, field_index))' # failed on EXPLAIN EXTENDED with constant table and view # CREATE TABLE t1 (pk INT PRIMARY KEY) ENGINE=MyISAM; CREATE VIEW v1 AS SELECT * FROM t1; INSERT INTO t1 VALUES (1); EXPLAIN EXTENDED SELECT ISNULL(pk) FROM v1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 Warnings: Note 1003 select /*always not null*/ 1 is null AS `ISNULL(pk)` from dual EXPLAIN EXTENDED SELECT IFNULL(pk,0) FROM v1; id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 Warnings: Note 1003 select ifnull(1,0) AS `IFNULL(pk,0)` from dual DROP VIEW v1; DROP TABLE t1; # # End of 5.5 tests #