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Fixed mdev-4378.

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Uninitialized field cond_selectivity of the Field objects created
for the fields of a temporary table could cause an assertion abort.
This commit is contained in:
Igor Babaev 2013-04-08 17:40:58 -07:00
parent e3bf08d4b1
commit ddb84f909c
4 changed files with 94 additions and 0 deletions
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29
mysql-test/r/selectivity.result
View File

@ -935,4 +935,33 @@ Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where (isnull(`test`.`t
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-4378: 2-way join with a materialized IN subquery in WHERE
# when optimizer_use_condition_selectivity=4
#
set use_stat_tables=PREFERABLY;
set histogram_size=50;
set histogram_type=SINGLE_PREC_HB;
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (8),(9),(6);
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (8),(1),(8),(9),(24),(6),(1),(6),(2),(4);
CREATE TABLE t3 (ln VARCHAR(16)) ENGINE=MyISAM;
INSERT INTO t3 VALUES
('smith'),('black'),('white'),('jones'),
('brown'),('taylor'),('anderson'),('taylor');
ANALYZE TABLE t1, t2, t3;
Table Op Msg_type Msg_text
test.t1 analyze status OK
test.t2 analyze status OK
test.t3 analyze status OK
FLUSH TABLES;
set optimizer_use_condition_selectivity=4;
SELECT * FROM t1, t2 WHERE 'garcia' IN ( SELECT MIN( ln ) FROM t3 WHERE ln = 'sun' );
a b
set histogram_size=@save_histogram_size;
set histogram_type=@save_histogram_type;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2,t3;
set use_stat_tables=@save_use_stat_tables;
set use_stat_tables=@save_use_stat_tables;

29
mysql-test/r/selectivity_innodb.result
View File

@ -943,6 +943,35 @@ Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where (isnull(`test`.`t
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-4378: 2-way join with a materialized IN subquery in WHERE
# when optimizer_use_condition_selectivity=4
#
set use_stat_tables=PREFERABLY;
set histogram_size=50;
set histogram_type=SINGLE_PREC_HB;
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (8),(9),(6);
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (8),(1),(8),(9),(24),(6),(1),(6),(2),(4);
CREATE TABLE t3 (ln VARCHAR(16)) ENGINE=MyISAM;
INSERT INTO t3 VALUES
('smith'),('black'),('white'),('jones'),
('brown'),('taylor'),('anderson'),('taylor');
ANALYZE TABLE t1, t2, t3;
Table Op Msg_type Msg_text
test.t1 analyze status OK
test.t2 analyze status OK
test.t3 analyze status OK
FLUSH TABLES;
set optimizer_use_condition_selectivity=4;
SELECT * FROM t1, t2 WHERE 'garcia' IN ( SELECT MIN( ln ) FROM t3 WHERE ln = 'sun' );
a b
set histogram_size=@save_histogram_size;
set histogram_type=@save_histogram_type;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2,t3;
set use_stat_tables=@save_use_stat_tables;
set use_stat_tables=@save_use_stat_tables;
set optimizer_switch=@save_optimizer_switch_for_selectivity_test;
SET SESSION STORAGE_ENGINE=DEFAULT;

35
mysql-test/t/selectivity.test
View File

@ -526,5 +526,40 @@ DROP TABLE t1;
set use_stat_tables=@save_use_stat_tables;
--echo #
--echo # Bug mdev-4378: 2-way join with a materialized IN subquery in WHERE
--echo # when optimizer_use_condition_selectivity=4
--echo #
set use_stat_tables=PREFERABLY;
set histogram_size=50;
set histogram_type=SINGLE_PREC_HB;
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (8),(9),(6);
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (8),(1),(8),(9),(24),(6),(1),(6),(2),(4);
CREATE TABLE t3 (ln VARCHAR(16)) ENGINE=MyISAM;
INSERT INTO t3 VALUES
('smith'),('black'),('white'),('jones'),
('brown'),('taylor'),('anderson'),('taylor');
ANALYZE TABLE t1, t2, t3;
FLUSH TABLES;
set optimizer_use_condition_selectivity=4;
SELECT * FROM t1, t2 WHERE 'garcia' IN ( SELECT MIN( ln ) FROM t3 WHERE ln = 'sun' );
set histogram_size=@save_histogram_size;
set histogram_type=@save_histogram_type;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
DROP TABLE t1,t2,t3;
set use_stat_tables=@save_use_stat_tables;
set use_stat_tables=@save_use_stat_tables;

1
sql/sql_select.cc
View File

@ -14335,6 +14335,7 @@ Field *create_tmp_field_from_field(THD *thd, Field *org_field,
((Field_double *) new_field)->not_fixed= TRUE;
new_field->vcol_info= 0;
new_field->stored_in_db= TRUE;
new_field->cond_selectivity= 1.0;
}
return new_field;
}