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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 306e1338a5
commit c84c4b107c
10 changed files with 308 additions and 211 deletions
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12
storage/innodb_plugin/include/lock0lock.h
View File

@ -340,11 +340,12 @@ lock_sec_rec_modify_check_and_lock(
que_thr_t* thr, /*!< in: query thread */
mtr_t* mtr); /*!< in/out: mini-transaction */
/*********************************************************************//**
Like the counterpart for a clustered index below, but now we read a
Like lock_clust_rec_read_check_and_lock(), but reads a
secondary index record.
@return DB_SUCCESS, DB_LOCK_WAIT, DB_DEADLOCK, or DB_QUE_THR_SUSPENDED */
@return DB_SUCCESS, DB_SUCCESS_LOCKED_REC, DB_LOCK_WAIT, DB_DEADLOCK,
or DB_QUE_THR_SUSPENDED */
UNIV_INTERN
ulint
enum db_err
lock_sec_rec_read_check_and_lock(
/*=============================*/
ulint flags, /*!< in: if BTR_NO_LOCKING_FLAG
@ -371,9 +372,10 @@ if the query thread should anyway be suspended for some reason; if not, then
puts the transaction and the query thread to the lock wait state and inserts a
waiting request for a record lock to the lock queue. Sets the requested mode
lock on the record.
@return DB_SUCCESS, DB_LOCK_WAIT, DB_DEADLOCK, or DB_QUE_THR_SUSPENDED */
@return DB_SUCCESS, DB_SUCCESS_LOCKED_REC, DB_LOCK_WAIT, DB_DEADLOCK,
or DB_QUE_THR_SUSPENDED */
UNIV_INTERN
ulint
enum db_err
lock_clust_rec_read_check_and_lock(
/*===============================*/
ulint flags, /*!< in: if BTR_NO_LOCKING_FLAG