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Bug#11759688 52020: InnoDB can still deadlock on just INSERT...ON DUPLICATE KEY

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a.k.a. Bug#7975 deadlock without any locking, simple select and update

Bug#7975 was reintroduced when the storage engine API was made
pluggable in MySQL 5.1. Instead of looking at thd->lex directly, we
rely on handler::extra(). But, we were looking at the wrong extra()
flag, and we were ignoring the TRX_DUP_REPLACE flag in places where we
should obey it.

innodb_replace.test: Add tests for hopefully all affected statement
types, so that bug should never ever resurface. This kind of tests
should have been added when fixing Bug#7975 in MySQL 5.0.3 in the
first place.

rb:806 approved by Sunny Bains
This commit is contained in:
Marko Mäkelä
2011-11-10 12:49:31 +02:00
parent 77eb01b827
commit a0a51251e4
10 changed files with 559 additions and 25 deletions
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77
mysql-test/suite/innodb_plugin/r/innodb_replace.result Normal file
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@ -0,0 +1,77 @@
#
#Bug#11759688 52020: InnoDB can still deadlock
#on just INSERT...ON DUPLICATE KEY
#a.k.a. Bug#7975 deadlock without any locking, simple select and update
#
CREATE TABLE t1 (a INT PRIMARY KEY, b INT NOT NULL) ENGINE=InnoDB;
INSERT INTO t1 VALUES(3,1);
BEGIN;
SET DEBUG_SYNC='write_row_noreplace SIGNAL insert1 WAIT_FOR select1';
INSERT INTO t1 VALUES(3,2);
SET DEBUG_SYNC='now WAIT_FOR insert1';
SELECT * FROM t1 LOCK IN SHARE MODE;
a b
3 1
SELECT * FROM t1 FOR UPDATE;
SET DEBUG_SYNC='now SIGNAL select1';
ERROR 23000: Duplicate entry '3' for key 'PRIMARY'
INSERT INTO t1 VALUES(3,3) ON DUPLICATE KEY UPDATE b=b+10;
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
COMMIT;
SET DEBUG_SYNC='write_row_replace SIGNAL insert2 WAIT_FOR select2';
REPLACE INTO t1 VALUES(3,4);
SET DEBUG_SYNC='now WAIT_FOR insert2';
SELECT * FROM t1;
a b
3 11
SELECT * FROM t1 LOCK IN SHARE MODE;
SET DEBUG_SYNC='now SIGNAL select2';
SET DEBUG_SYNC='write_row_replace SIGNAL insert3 WAIT_FOR select3';
INSERT INTO t1 VALUES(3,5) ON DUPLICATE KEY UPDATE b=b+20;
a b
3 4
SET DEBUG_SYNC='now WAIT_FOR insert3';
SELECT b FROM t1 LOCK IN SHARE MODE;
SET DEBUG_SYNC='now SIGNAL select3';
b
24
SET DEBUG_SYNC='write_row_noreplace SIGNAL insert4 WAIT_FOR select4';
LOAD DATA INFILE '../../std_data/loaddata5.dat' INTO TABLE t1 FIELDS TERMINATED BY '' ENCLOSED BY '' (a, b);
SET DEBUG_SYNC='now WAIT_FOR insert4';
SELECT b FROM t1 WHERE a=3 LOCK IN SHARE MODE;
b
24
SELECT b FROM t1 WHERE a=3 FOR UPDATE;
SET DEBUG_SYNC='now SIGNAL select4';
b
24
ERROR 23000: Duplicate entry '3' for key 'PRIMARY'
SET DEBUG_SYNC='write_row_noreplace SIGNAL insert5 WAIT_FOR select5';
LOAD DATA INFILE '../../std_data/loaddata5.dat' IGNORE INTO TABLE t1 FIELDS TERMINATED BY '' ENCLOSED BY '' (a, b);
SET DEBUG_SYNC='now WAIT_FOR insert5';
SELECT * FROM t1;
a b
3 24
SELECT * FROM t1 WHERE a=3 LOCK IN SHARE MODE;
a b
3 24
SELECT * FROM t1 WHERE a=3 FOR UPDATE;
SET DEBUG_SYNC='now SIGNAL select5';
a b
3 24
SET DEBUG_SYNC='write_row_replace SIGNAL insert6 WAIT_FOR select6';
LOAD DATA INFILE '../../std_data/loaddata5.dat' REPLACE INTO TABLE t1 FIELDS TERMINATED BY '' ENCLOSED BY '' (a, b);
SET DEBUG_SYNC='now WAIT_FOR insert6';
SELECT * FROM t1;
a b
1 2
3 24
5 6
SELECT a,b FROM t1 LOCK IN SHARE MODE;
SET DEBUG_SYNC='now SIGNAL select6';
a b
1 2
3 4
5 6
SET DEBUG_SYNC='RESET';
DROP TABLE t1;