Details
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Bug
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Status: Closed (View Workflow)
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Major
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Resolution: Fixed
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10.0.0
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None
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None
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None
Description
The following test case
--source include/have_innodb.inc
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SET optimizer_switch='index_merge=on,index_merge_intersection=on';
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CREATE TABLE t1 (
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a INT PRIMARY KEY,
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b INT,
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c VARCHAR(1024) CHARACTER SET utf8,
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d INT,
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KEY (b)
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) ENGINE=InnoDB;
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INSERT INTO t1 VALUES
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(1, 9, 'one', 11), (2, 6, 'two', 12), (3, 2, 'three', 13), (4, 5, 'four', 14);
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CREATE TABLE t2 (e INT, g INT) ENGINE=InnoDB;
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INSERT INTO t2 VALUES (1,9), (2,6) ;
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SELECT * FROM t1, t2 WHERE g = b AND ( a < 7 OR a > e );
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DROP TABLE t1, t2;
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produces a wrong result. It returns the right 2 rows, but values in the 2nd row are strange:
a b c d e g
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1 9 one 11 1 9
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2 6 0 2 6
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There are no c='' and d=0 in the dataset, they should be 'two' and 12 instead.
bzr version-info
revision-id: timour@askmonty.org-20121022095529-87ykx0dubnj62c9y
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date: 2012-10-22 12:55:29 +0300
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revno: 3452
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branch: ~maria-captains/maria/10.0-serg
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Not reproducible on MariaDB 5.2 revno 3163, 5.3 revno 3587, 5.5 revno 3562, MySQL 5.6 revno 4229.
Not reproducible with t1 being a MyISAM or Aria table.
Minimal optimizer_switch: index_merge=on,index_merge_intersection=on
Full optimizer_switch (default):
index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=off
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EXPLAIN (with the minimal optimizer_switch):
id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00
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1 SIMPLE t1 ALL PRIMARY,b NULL NULL NULL 4 75.00 Range checked for each record (index map: 0x3)
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Warnings:
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Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,`test`.`t1`.`d` AS `d`,`test`.`t2`.`e` AS `e`,`test`.`t2`.`g` AS `g` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`b` = `test`.`t2`.`g`) and ((`test`.`t1`.`a` < 7) or (`test`.`t1`.`a` > `test`.`t2`.`e`)))
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