diff options
Diffstat (limited to 'mysql-test/r/func_group.result')
| -rw-r--r-- | mysql-test/r/func_group.result | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/mysql-test/r/func_group.result b/mysql-test/r/func_group.result index f245d272ede..e5720cc1ee0 100644 --- a/mysql-test/r/func_group.result +++ b/mysql-test/r/func_group.result @@ -1330,4 +1330,51 @@ SELECT a,AVG(DISTINCT b) AS average FROM t1 GROUP BY a HAVING average > 50; a average 1 32768.5000 DROP TABLE t1; +CREATE TABLE t1 ( a INT, b INT, KEY(a) ); +INSERT INTO t1 VALUES (NULL, 1), (NULL, 2); +EXPLAIN SELECT MIN(a), MIN(b) FROM t1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL NULL NULL NULL NULL 2 +SELECT MIN(a), MIN(b) FROM t1; +MIN(a) MIN(b) +NULL 1 +CREATE TABLE t2( a INT, b INT, c INT, KEY(a, b) ); +INSERT INTO t2 ( a, b, c ) VALUES ( 1, NULL, 2 ), ( 1, 3, 4 ), ( 1, 4, 4 ); +EXPLAIN SELECT MIN(b), MIN(c) FROM t2 WHERE a = 1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref a a 5 const 2 Using where +SELECT MIN(b), MIN(c) FROM t2 WHERE a = 1; +MIN(b) MIN(c) +3 2 +CREATE TABLE t3 (a INT, b INT, c int, KEY(a, b)); +INSERT INTO t3 VALUES (1, NULL, 1), (2, NULL, 2), (2, NULL, 2), (3, NULL, 3); +EXPLAIN SELECT MIN(a), MIN(b) FROM t3 where a = 2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +SELECT MIN(a), MIN(b) FROM t3 where a = 2; +MIN(a) MIN(b) +2 NULL +CREATE TABLE t4 (a INT, b INT, c int, KEY(a, b)); +INSERT INTO t4 VALUES (1, 1, 1), (2, NULL, 2), (2, NULL, 2), (3, 1, 3); +EXPLAIN SELECT MIN(a), MIN(b) FROM t4 where a = 2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +SELECT MIN(a), MIN(b) FROM t4 where a = 2; +MIN(a) MIN(b) +2 NULL +SELECT MIN(b), min(c) FROM t4 where a = 2; +MIN(b) min(c) +NULL 2 +CREATE TABLE t5( a INT, b INT, KEY( a, b) ); +INSERT INTO t5 VALUES( 1, 1 ), ( 1, 2 ); +EXPLAIN SELECT MIN(a), MIN(b) FROM t5 WHERE a = 1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away +SELECT MIN(a), MIN(b) FROM t5 WHERE a = 1; +MIN(a) MIN(b) +1 1 +SELECT MIN(a), MIN(b) FROM t5 WHERE a = 1 and b > 1; +MIN(a) MIN(b) +1 2 +DROP TABLE t1, t2, t3, t4, t5; End of 5.0 tests |