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| author | Igor Babaev <igor@askmonty.org> | 2018-01-12 00:14:40 -0800 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2018-01-12 13:14:27 -0800 |
| commit | abc123391f5a22e18c8e260541dbdbde1375e8b5 (patch) | |
| tree | f6c1281622ceb25124595bccf051603782feb243 /mysql-test/r | |
| parent | 6293e3bbcfc866397809b844485b9fdede97dc1b (diff) | |
| download | mariadb-git-abc123391f5a22e18c8e260541dbdbde1375e8b5.tar.gz | |
Fixed mdev-6706 Wrong result (missing rows)
with joins, SQ, ORDER BY, semijoin=on
A bug in get_sort_by_table() could mislead the function
setup_semijoin_dups_elimination(). As a result the optimizer
could produce invalid execution plans for queries with ORDER BY
and subquery predicates that could be converted to semi-joins.
Diffstat (limited to 'mysql-test/r')
| -rw-r--r-- | mysql-test/r/order_by.result | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/mysql-test/r/order_by.result b/mysql-test/r/order_by.result index 94a38ca7827..d3f5cd89eee 100644 --- a/mysql-test/r/order_by.result +++ b/mysql-test/r/order_by.result @@ -2061,4 +2061,50 @@ ORDER BY NULL, @a0 := 3, @a1 := 3, @a2 := 3, @a3 := 3, @a4 := 3, 1 1 2 +# +# mdev-6706: semi-join with duplicate weedout + ORDER BY +# +CREATE TABLE t1 (f1 VARCHAR(3)) ENGINE=MyISAM; +INSERT INTO t1 VALUES ('foo'); +CREATE TABLE t2 (f2 VARCHAR(3)) ENGINE=MyISAM; +INSERT INTO t2 VALUES ('bar'),('baz'); +CREATE TABLE t3 +(i3_key INT, f3_key VARCHAR(3), f3 VARCHAR(3), KEY(f3_key,i3_key)) +ENGINE=MyISAM; +INSERT INTO t3 VALUES (0,'qux','qux'),(8,'bar','bar'); +SELECT CONCAT( f1, f2 ) AS field FROM t1, t2 +WHERE f1 = ANY ( SELECT f1 +FROM t1 +LEFT JOIN ( t3 AS t3a, t3 AS t3b ) +ON ( t3b.f3_key = t3a.f3 ) +WHERE t3a.f3 < f1 OR t3b.f3 != f1 ); +field +foobar +foobaz +SELECT CONCAT( f1, f2 ) AS field FROM t1, t2 +WHERE f1 = ANY ( SELECT f1 +FROM t1 +LEFT JOIN ( t3 AS t3a, t3 AS t3b ) +ON ( t3b.f3_key = t3a.f3 ) +WHERE t3a.f3 < f1 OR t3b.f3 != f1 ) +ORDER BY field; +field +foobar +foobaz +EXPLAIN EXTENDED SELECT CONCAT( f1, f2 ) AS field FROM t1, t2 +WHERE f1 = ANY ( SELECT f1 +FROM t1 +LEFT JOIN ( t3 AS t3a, t3 AS t3b ) +ON ( t3b.f3_key = t3a.f3 ) +WHERE t3a.f3 < f1 OR t3b.f3 != f1 ) +ORDER BY field; +id select_type table type possible_keys key key_len ref rows filtered Extra +1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00 Using temporary; Using filesort +1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00 +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 +1 PRIMARY t3a ALL NULL NULL NULL NULL 2 100.00 Using where; Start temporary +1 PRIMARY t3b ref f3_key f3_key 6 test.t3a.f3 1 100.00 Using where; End temporary +Warnings: +Note 1003 select concat('foo',`test`.`t2`.`f2`) AS `field` from `test`.`t2` semi join ((`test`.`t3` `t3a` join `test`.`t3` `t3b`)) where ((`test`.`t3a`.`f3` < 'foo') or (`test`.`t3b`.`f3` <> 'foo')) order by concat('foo',`test`.`t2`.`f2`) +DROP TABLE t1,t2,t3; End of 5.5 tests |