diff options
Diffstat (limited to 'mysql-test/r/join.result')
| -rw-r--r-- | mysql-test/r/join.result | 46 |
1 files changed, 38 insertions, 8 deletions
diff --git a/mysql-test/r/join.result b/mysql-test/r/join.result index 79eb2e3287e..e8df0cfec2f 100644 --- a/mysql-test/r/join.result +++ b/mysql-test/r/join.result @@ -404,7 +404,7 @@ SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e ORDER BY t1.b, t1.c; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 32 Using temporary; Using filesort -1 SIMPLE t2 ALL NULL NULL NULL NULL 16 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 16 Using where; Using join buffer (flat, BNL join) SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e ORDER BY t1.b, t1.c; e @@ -846,7 +846,7 @@ select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b; a b a a explain select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 4 +1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using where 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index We expect rnd_next=5, and read_key must be 0 because of short-cutting: @@ -889,8 +889,8 @@ Z vv: Following query must use ALL(t1), eq_ref(A), eq_ref(B): vv explain select * from t1, t2 A, t2 B where A.a = t1.a and B.a=A.b; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 10 -1 SIMPLE A eq_ref PRIMARY PRIMARY 4 test.t1.a 1 +1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where +1 SIMPLE A eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where 1 SIMPLE B eq_ref PRIMARY PRIMARY 4 test.A.b 1 show status like '%cost%'; Variable_name Value @@ -910,7 +910,7 @@ INSERT INTO t1 SELECT a + 64, b FROM t1; INSERT INTO t2 SELECT a, b FROM t1; EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a LIMIT 2; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 index NULL PRIMARY 4 NULL 2 +1 SIMPLE t1 index NULL PRIMARY 4 NULL 2 Using where 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a LIMIT 2; id select_type table type possible_keys key key_len ref rows Extra @@ -924,7 +924,7 @@ a b c d 2 NULL 2 NULL EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a; id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 128 Using filesort +1 SIMPLE t1 ALL NULL NULL NULL NULL 128 Using where; Using filesort 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a; id select_type table type possible_keys key key_len ref rows Extra @@ -1095,11 +1095,11 @@ ON t4.a = t5.a ON t1.a = t3.a; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 ALL NULL NULL NULL NULL 3 -1 SIMPLE t3 ref a a 5 test.t1.a 2 Using index +1 SIMPLE t3 ref a a 5 test.t1.a 2 Using where; Using index 1 SIMPLE t4 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t5 ALL NULL NULL NULL NULL 0 Using where 1 SIMPLE t6 ALL NULL NULL NULL NULL 0 Using where -1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer +1 SIMPLE t2 ALL NULL NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join) SELECT * FROM t1 JOIN t2 ON t1.a = t2.a @@ -1220,4 +1220,34 @@ f1 2 DEALLOCATE PREPARE stmt; DROP TABLE t1; +# +# BUG#47217 Lost optimization caused slowdown & wrong result. +# +CREATE TABLE t1 (pk INT, v VARCHAR(2), PRIMARY KEY(pk)); +CREATE INDEX ix1 ON t1(v); +CREATE TABLE t2 (pk INT, v VARCHAR(2), PRIMARY KEY(pk)); +CREATE INDEX ix2 ON t2(v); +INSERT INTO t1 VALUES (1,'a'),(2,NULL); +INSERT INTO t2 VALUES (1,NULL); +EXPLAIN SELECT * FROM t1 JOIN t2 ON t1.v = t2.v ORDER BY 1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +EXPLAIN SELECT * FROM t1 JOIN t2 ON t1.v = t2.v; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables +INSERT INTO t1 VALUES (3,'b'),(4,NULL),(5,'c'),(6,'cc'),(7,'d'), +(8,'dd'),(9,'e'),(10,'ee'); +INSERT INTO t2 VALUES (2,NULL); +FLUSH STATUS; +SELECT * FROM t1 JOIN t2 ON t1.v = t2.v WHERE t2.v IS NULL ORDER BY 1; +pk v pk v +SHOW STATUS LIKE 'Handler_read_%'; +Variable_name Value +Handler_read_first 0 +Handler_read_key 1 +Handler_read_next 0 +Handler_read_prev 0 +Handler_read_rnd 0 +Handler_read_rnd_next 1 +DROP TABLE t1, t2; End of 5.1 tests |