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Fixed mdev-4380.

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Uninitialized field next_equal_field of the Field objects created
for the fields of a temporary table could hang the server.
This commit is contained in:
Igor Babaev 2013-04-08 21:30:42 -07:00
parent ddb84f909c
commit 1db675b6e8
4 changed files with 81 additions and 0 deletions
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25
mysql-test/r/selectivity.result
View File

@ -964,4 +964,29 @@ 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;
#
# Bug mdev-4380: 2-way join with a materialized IN subquery in WHERE
# when optimizer_use_condition_selectivity=3
#
set use_stat_tables=PREFERABLY;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (5),(9);
CREATE TABLE t2 (b VARCHAR(8));
INSERT INTO t2 VALUES ('red'),('blue');
CREATE TABLE t3 (c VARCHAR(8), d VARCHAR(8));
INSERT INTO t3 VALUES ('white','black'),('cyan','yellow');
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=3;
SELECT * FROM t1, t2 WHERE ( 'orange', 'green' ) IN (
SELECT MAX(c), MAX(d) FROM t3, t2 WHERE c >= d AND b = c
);
a b
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;

25
mysql-test/r/selectivity_innodb.result
View File

@ -972,6 +972,31 @@ 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;
#
# Bug mdev-4380: 2-way join with a materialized IN subquery in WHERE
# when optimizer_use_condition_selectivity=3
#
set use_stat_tables=PREFERABLY;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (5),(9);
CREATE TABLE t2 (b VARCHAR(8));
INSERT INTO t2 VALUES ('red'),('blue');
CREATE TABLE t3 (c VARCHAR(8), d VARCHAR(8));
INSERT INTO t3 VALUES ('white','black'),('cyan','yellow');
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=3;
SELECT * FROM t1, t2 WHERE ( 'orange', 'green' ) IN (
SELECT MAX(c), MAX(d) FROM t3, t2 WHERE c >= d AND b = c
);
a b
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;

30
mysql-test/t/selectivity.test
View File

@ -561,5 +561,35 @@ DROP TABLE t1,t2,t3;
set use_stat_tables=@save_use_stat_tables;
--echo #
--echo # Bug mdev-4380: 2-way join with a materialized IN subquery in WHERE
--echo # when optimizer_use_condition_selectivity=3
--echo #
set use_stat_tables=PREFERABLY;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (5),(9);
CREATE TABLE t2 (b VARCHAR(8));
INSERT INTO t2 VALUES ('red'),('blue');
CREATE TABLE t3 (c VARCHAR(8), d VARCHAR(8));
INSERT INTO t3 VALUES ('white','black'),('cyan','yellow');
ANALYZE TABLE t1, t2, t3;
FLUSH TABLES;
set optimizer_use_condition_selectivity=3;
SELECT * FROM t1, t2 WHERE ( 'orange', 'green' ) IN (
SELECT MAX(c), MAX(d) FROM t3, t2 WHERE c >= d AND b = c
);
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

@ -14336,6 +14336,7 @@ Field *create_tmp_field_from_field(THD *thd, Field *org_field,
new_field->vcol_info= 0;
new_field->stored_in_db= TRUE;
new_field->cond_selectivity= 1.0;
new_field->next_equal_field= NULL;
}
return new_field;
}