diff options
Diffstat (limited to 'mysql-test/r/group_by.result')
| -rw-r--r-- | mysql-test/r/group_by.result | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/mysql-test/r/group_by.result b/mysql-test/r/group_by.result index 4b1ee3bec8a..991158970ae 100644 --- a/mysql-test/r/group_by.result +++ b/mysql-test/r/group_by.result @@ -1703,3 +1703,91 @@ COUNT(i) 1 DROP TABLE t1; SET @@sql_mode = @old_sql_mode; +# +# Bug #45640: optimizer bug produces wrong results +# +CREATE TABLE t1 (a INT, b INT); +INSERT INTO t1 VALUES (4, 40), (1, 10), (2, 20), (2, 20), (3, 30); +# should return 4 ordered records: +SELECT (SELECT t1.a) aa, COUNT(DISTINCT b) FROM t1 GROUP BY aa; +aa COUNT(DISTINCT b) +1 1 +2 1 +3 1 +4 1 +SELECT (SELECT (SELECT t1.a)) aa, COUNT(DISTINCT b) FROM t1 GROUP BY aa; +aa COUNT(DISTINCT b) +1 1 +2 1 +3 1 +4 1 +SELECT (SELECT t1.a) aa, COUNT(DISTINCT b) FROM t1 GROUP BY aa+0; +aa COUNT(DISTINCT b) +1 1 +2 1 +3 1 +4 1 +# should return the same result in a reverse order: +SELECT (SELECT t1.a) aa, COUNT(DISTINCT b) FROM t1 GROUP BY -aa; +aa COUNT(DISTINCT b) +4 1 +3 1 +2 1 +1 1 +# execution plan should not use temporary table: +EXPLAIN EXTENDED +SELECT (SELECT t1.a) aa, COUNT(DISTINCT b) FROM t1 GROUP BY aa+0; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00 Using filesort +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used +Warnings: +Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1 +Note 1003 select (select `test`.`t1`.`a`) AS `aa`,count(distinct `test`.`t1`.`b`) AS `COUNT(DISTINCT b)` from `test`.`t1` group by ((select `test`.`t1`.`a`) + 0) +EXPLAIN EXTENDED +SELECT (SELECT t1.a) aa, COUNT(DISTINCT b) FROM t1 GROUP BY -aa; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 5 100.00 Using filesort +2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used +Warnings: +Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1 +Note 1003 select (select `test`.`t1`.`a`) AS `aa`,count(distinct `test`.`t1`.`b`) AS `COUNT(DISTINCT b)` from `test`.`t1` group by -((select `test`.`t1`.`a`)) +# should return only one record +SELECT (SELECT tt.a FROM t1 tt LIMIT 1) aa, COUNT(DISTINCT b) FROM t1 +GROUP BY aa; +aa COUNT(DISTINCT b) +4 4 +CREATE TABLE t2 SELECT DISTINCT a FROM t1; +# originally reported queries (1st two columns of next two query +# results should be same): +SELECT (SELECT t2.a FROM t2 WHERE t2.a = t1.a) aa, b, COUNT(DISTINCT b) +FROM t1 GROUP BY aa, b; +aa b COUNT(DISTINCT b) +1 10 1 +2 20 1 +3 30 1 +4 40 1 +SELECT (SELECT t2.a FROM t2 WHERE t2.a = t1.a) aa, b, COUNT( b) +FROM t1 GROUP BY aa, b; +aa b COUNT( b) +1 10 1 +2 20 2 +3 30 1 +4 40 1 +# ORDER BY for sure: +SELECT (SELECT t2.a FROM t2 WHERE t2.a = t1.a) aa, b, COUNT(DISTINCT b) +FROM t1 GROUP BY aa, b ORDER BY -aa, -b; +aa b COUNT(DISTINCT b) +4 40 1 +3 30 1 +2 20 1 +1 10 1 +SELECT (SELECT t2.a FROM t2 WHERE t2.a = t1.a) aa, b, COUNT( b) +FROM t1 GROUP BY aa, b ORDER BY -aa, -b; +aa b COUNT( b) +4 40 1 +3 30 1 +2 20 2 +1 10 1 +DROP TABLE t1, t2; +# +# End of 5.1 tests |