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Viewing changes to storage/innobase/row/row0purge.c

  • Committer: Monty Taylor
  • Date: 2009-01-09 07:02:24 UTC
  • mto: (779.1.2 devel)
  • mto: This revision was merged to the branch mainline in revision 784.
  • Revision ID: mordred@inaugust.com-20090109070224-prwl5p52mfql3zfw
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storage/innobase/row/row0purge.c
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/*****************************************************************************
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Copyright (c) 1997, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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/******************************************************
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Purge obsolete records
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(c) 1997 Innobase Oy
 
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Created 3/14/1997 Heikki Tuuri
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*******************************************************/
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        ibool           found;
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        ulint           err;
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        mtr_t           mtr;
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        mtr_t           mtr_vers;
 
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        mtr_t*          mtr_vers;
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        log_free_check();
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        mtr_start(&mtr);
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        found = row_search_index_entry(index, entry, mode, &pcur, &mtr);
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        if (!found) {
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                /* Not found.  This is a legitimate condition.  In a
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                rollback, InnoDB will remove secondary recs that would
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                be purged anyway.  Then the actual purge will not find
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                the secondary index record.  Also, the purge itself is
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                eager: if it comes to consider a secondary index
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                record, and notices it does not need to exist in the
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                index, it will remove it.  Then if/when the purge
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                comes to consider the secondary index record a second
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                time, it will not exist any more in the index. */
 
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                /* Not found */
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                /* fputs("PURGE:........sec entry not found\n", stderr); */
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                /* dtuple_print(stderr, entry); */
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        which cannot be purged yet, requires its existence. If some requires,
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        we should do nothing. */
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        mtr_start(&mtr_vers);
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        success = row_purge_reposition_pcur(BTR_SEARCH_LEAF, node, &mtr_vers);
 
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        mtr_vers = mem_alloc(sizeof(mtr_t));
 
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        mtr_start(mtr_vers);
 
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        success = row_purge_reposition_pcur(BTR_SEARCH_LEAF, node, mtr_vers);
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        if (success) {
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                old_has = row_vers_old_has_index_entry(
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                        TRUE, btr_pcur_get_rec(&(node->pcur)),
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                        &mtr_vers, index, entry);
 
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                        mtr_vers, index, entry);
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        }
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        btr_pcur_commit_specify_mtr(&(node->pcur), &mtr_vers);
 
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        btr_pcur_commit_specify_mtr(&(node->pcur), mtr_vers);
 
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        mem_free(mtr_vers);
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        if (!success || !old_has) {
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                /* Remove the index record */