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Bug#53674: InnoDB: Error: unlock row could not find a 4 mode lock on the record

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In semi-consistent read, only unlock freshly locked non-matching records.

Define DB_SUCCESS_LOCKED_REC for indicating a successful operation
where a record lock was created.

lock_rec_lock_fast(): Return LOCK_REC_SUCCESS,
LOCK_REC_SUCCESS_CREATED, or LOCK_REC_FAIL instead of TRUE/FALSE.

lock_sec_rec_read_check_and_lock(),
lock_clust_rec_read_check_and_lock(), lock_rec_enqueue_waiting(),
lock_rec_lock_slow(), lock_rec_lock(), row_ins_set_shared_rec_lock(),
row_ins_set_exclusive_rec_lock(), sel_set_rec_lock(),
row_sel_get_clust_rec_for_mysql(): Return DB_SUCCESS_LOCKED_REC if a
new record lock was created. Adjust callers.

row_unlock_for_mysql(): Correct the function documentation.

row_prebuilt_t::new_rec_locks: Correct the documentation.
This commit is contained in:
Marko Mäkelä
2010-06-02 13:26:37 +03:00
parent b55ec58701
commit 306e1338a5
10 changed files with 295 additions and 210 deletions
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11
mysql-test/suite/innodb/r/innodb_bug53674.result Normal file
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create table bug53674(a int)engine=innodb;
insert into bug53674 values (1),(2);
start transaction;
select * from bug53674 for update;
a
1
2
select * from bug53674 where a=(select a from bug53674 where a > 1);
a
2
drop table bug53674;

1
mysql-test/suite/innodb/t/innodb_bug53674-master.opt Normal file
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--log-bin --innodb-locks-unsafe-for-binlog --binlog-format=mixed

8
mysql-test/suite/innodb/t/innodb_bug53674.test Normal file
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-- source include/have_innodb.inc
create table bug53674(a int)engine=innodb;
insert into bug53674 values (1),(2);
start transaction;
select * from bug53674 for update;
select * from bug53674 where a=(select a from bug53674 where a > 1);
drop table bug53674;