diff options
Diffstat (limited to 'storage/innobase/lock/lock0lock.cc')
| -rw-r--r-- | storage/innobase/lock/lock0lock.cc | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/storage/innobase/lock/lock0lock.cc b/storage/innobase/lock/lock0lock.cc index e4db2c30751..c1e12ea2928 100644 --- a/storage/innobase/lock/lock0lock.cc +++ b/storage/innobase/lock/lock0lock.cc @@ -3268,6 +3268,47 @@ lock_update_merge_left( } /*************************************************************//** +Updates the lock table when a page is split and merged to +two pages. */ +UNIV_INTERN +void +lock_update_split_and_merge( + const buf_block_t* left_block, /*!< in: left page to which merged */ + const rec_t* orig_pred, /*!< in: original predecessor of + supremum on the left page before merge*/ + const buf_block_t* right_block) /*!< in: right page from which merged */ +{ + const rec_t* left_next_rec; + + ut_a(left_block && right_block); + ut_a(orig_pred); + + lock_mutex_enter(); + + left_next_rec = page_rec_get_next_const(orig_pred); + + /* Inherit the locks on the supremum of the left page to the + first record which was moved from the right page */ + lock_rec_inherit_to_gap( + left_block, left_block, + page_rec_get_heap_no(left_next_rec), + PAGE_HEAP_NO_SUPREMUM); + + /* Reset the locks on the supremum of the left page, + releasing waiting transactions */ + lock_rec_reset_and_release_wait(left_block, + PAGE_HEAP_NO_SUPREMUM); + + /* Inherit the locks to the supremum of the left page from the + successor of the infimum on the right page */ + lock_rec_inherit_to_gap(left_block, right_block, + PAGE_HEAP_NO_SUPREMUM, + lock_get_min_heap_no(right_block)); + + lock_mutex_exit(); +} + +/*************************************************************//** Resets the original locks on heir and replaces them with gap type locks inherited from rec. */ UNIV_INTERN |