diff options
Diffstat (limited to 'mysql-test/r/null.result')
| -rw-r--r-- | mysql-test/r/null.result | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/mysql-test/r/null.result b/mysql-test/r/null.result index b4cebac661f..af24ad428ff 100644 --- a/mysql-test/r/null.result +++ b/mysql-test/r/null.result @@ -1465,5 +1465,65 @@ Warnings: Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where ((`test`.`t1`.`a` = 2020) and ((case when 2020 = 2010 then NULL else `test`.`t1`.`a` end) = concat('2020',rand()))) DROP TABLE t1; # +# MDEV-9181 (NULLIF(count(table.col)), 0) gives wrong result on 10.1.x +# +CREATE TABLE t1 (c1 varchar(50) DEFAULT NULL); +INSERT INTO t1 (c1) VALUES ('hello'), ('hello\r\n'), ('hello'),('hello'); +SELECT NULLIF(COUNT(c1),0) FROM t1; +NULLIF(COUNT(c1),0) +4 +SELECT CASE WHEN COUNT(c1)=0 THEN NULL ELSE COUNT(c1) END FROM t1; +CASE WHEN COUNT(c1)=0 THEN NULL ELSE COUNT(c1) END +4 +SELECT NULLIF(COUNT(c1)+0,0) AS c1,NULLIF(CAST(COUNT(c1) AS SIGNED),0) AS c2,NULLIF(CONCAT(COUNT(c1)),0) AS c3 FROM t1; +c1 c2 c3 +4 4 4 +SELECT NULLIF(COUNT(DISTINCT c1),0) FROM t1; +NULLIF(COUNT(DISTINCT c1),0) +2 +SELECT CASE WHEN COUNT(DISTINCT c1)=0 THEN NULL ELSE COUNT(DISTINCT c1) END FROM t1; +CASE WHEN COUNT(DISTINCT c1)=0 THEN NULL ELSE COUNT(DISTINCT c1) END +2 +DROP TABLE t1; +CREATE TABLE t1 ( +id INT NOT NULL, +c1 INT DEFAULT NULL +); +INSERT INTO t1 VALUES (1,1),(1,2),(2,3),(2,4); +SELECT NULLIF(COUNT(c1),0) AS c1,NULLIF(COUNT(c1)+0,0) AS c1_wrapped,CASE WHEN COUNT(c1) IS NULL THEN 0 ELSE COUNT(c1) END AS c1_case FROM t1 GROUP BY id; +c1 c1_wrapped c1_case +2 2 2 +2 2 2 +DROP TABLE t1; +CREATE TABLE t1 (a INT); +INSERT INTO t1 VALUES (1),(2),(3); +SET @a=0; +SELECT NULLIF(LAST_VALUE(@a:=@a+1,a),0) FROM t1; +NULLIF(LAST_VALUE(@a:=@a+1,a),0) +1 +2 +3 +SELECT @a; +@a +6 +SET @a=0; +SELECT NULLIF(AVG(a),0), NULLIF(AVG(LAST_VALUE(@a:=@a+1,a)),0) FROM t1; +NULLIF(AVG(a),0) NULLIF(AVG(LAST_VALUE(@a:=@a+1,a)),0) +2.0000 2.0000 +SELECT @a; +@a +3 +EXPLAIN EXTENDED SELECT NULLIF(a,0) FROM t1; +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 +Warnings: +Note 1003 select nullif(`test`.`t1`.`a`,0) AS `NULLIF(a,0)` from `test`.`t1` +EXPLAIN EXTENDED SELECT NULLIF(AVG(a),0) FROM t1; +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 +Warnings: +Note 1003 select nullif(<cache>(avg(`test`.`t1`.`a`)),0) AS `NULLIF(AVG(a),0)` from `test`.`t1` +DROP TABLE t1; +# # End of 10.1 tests # |