diff options
Diffstat (limited to 'innobase/trx/trx0undo.c')
| -rw-r--r-- | innobase/trx/trx0undo.c | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/innobase/trx/trx0undo.c b/innobase/trx/trx0undo.c index f2b7227d84a..0a47134c163 100644 --- a/innobase/trx/trx0undo.c +++ b/innobase/trx/trx0undo.c @@ -1673,56 +1673,6 @@ trx_undo_update_cleanup( } } -/************************************************************************** -Discards an undo log and puts the segment to the list of cached update undo -log segments. This optimized function is called if there is no need to keep -the update undo log because there exist no read views and the transaction -made no delete markings, which would make purge necessary. We restrict this -to undo logs of size 1 to make things simpler. */ - -dulint -trx_undo_update_cleanup_by_discard( -/*===============================*/ - /* out: log sequence number at which mtr is - committed */ - trx_t* trx, /* in: trx owning the update undo log */ - mtr_t* mtr) /* in: mtr */ -{ - trx_rseg_t* rseg; - trx_undo_t* undo; - page_t* undo_page; - - undo = trx->update_undo; - rseg = trx->rseg; - -#ifdef UNIV_SYNC_DEBUG - ut_ad(mutex_own(&(rseg->mutex))); - ut_ad(mutex_own(&kernel_mutex)); -#endif /* UNIV_SYNC_DEBUG */ - ut_ad(undo->size == 1); - ut_ad(undo->del_marks == FALSE); - ut_ad(UT_LIST_GET_LEN(trx_sys->view_list) == 1); - - /* NOTE: we must hold the kernel mutex, because we must prevent - creation of new read views before mtr gets committed! */ - - undo_page = trx_undo_page_get(undo->space, undo->hdr_page_no, mtr); - - trx_undo_discard_latest_update_undo(undo_page, mtr); - - undo->state = TRX_UNDO_CACHED; - - UT_LIST_REMOVE(undo_list, rseg->update_undo_list, undo); - - trx->update_undo = NULL; - - UT_LIST_ADD_FIRST(undo_list, rseg->update_undo_cached, undo); - - mtr_commit(mtr); - - return(mtr->end_lsn); -} - /********************************************************************** Frees or caches an insert undo log after a transaction commit or rollback. Knowledge of inserts is not needed after a commit or rollback, therefore |