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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.

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

enum db_err: Add DB_SUCCESS_LOCKED_REC for indicating a successful
operation where a record lock was created.

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 13:37:14 +03:00
parent 4a8aa70eb8
commit ac776a69e9
10 changed files with 308 additions and 211 deletions
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8
mysql-test/suite/innodb_plugin/t/innodb_bug53674.test Normal file
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-- source include/have_innodb_plugin.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;