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Diffstat (limited to 'storage/xtradb/include/row0purge.h')
-rw-r--r-- | storage/xtradb/include/row0purge.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/storage/xtradb/include/row0purge.h b/storage/xtradb/include/row0purge.h new file mode 100644 index 00000000000..fbc12f8d389 --- /dev/null +++ b/storage/xtradb/include/row0purge.h @@ -0,0 +1,95 @@ +/***************************************************************************** + +Copyright (c) 1997, 2009, Innobase Oy. All Rights Reserved. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., 59 Temple +Place, Suite 330, Boston, MA 02111-1307 USA + +*****************************************************************************/ + +/****************************************************** +Purge obsolete records + +Created 3/14/1997 Heikki Tuuri +*******************************************************/ + +#ifndef row0purge_h +#define row0purge_h + +#include "univ.i" +#include "data0data.h" +#include "btr0types.h" +#include "btr0pcur.h" +#include "dict0types.h" +#include "trx0types.h" +#include "que0types.h" +#include "row0types.h" + +/************************************************************************ +Creates a purge node to a query graph. */ +UNIV_INTERN +purge_node_t* +row_purge_node_create( +/*==================*/ + /* out, own: purge node */ + que_thr_t* parent, /* in: parent node, i.e., a thr node */ + mem_heap_t* heap); /* in: memory heap where created */ +/*************************************************************** +Does the purge operation for a single undo log record. This is a high-level +function used in an SQL execution graph. */ +UNIV_INTERN +que_thr_t* +row_purge_step( +/*===========*/ + /* out: query thread to run next or NULL */ + que_thr_t* thr); /* in: query thread */ + +/* Purge node structure */ + +struct purge_node_struct{ + que_common_t common; /* node type: QUE_NODE_PURGE */ + /*----------------------*/ + /* Local storage for this graph node */ + dulint roll_ptr;/* roll pointer to undo log record */ + trx_undo_rec_t* undo_rec;/* undo log record */ + trx_undo_inf_t* reservation;/* reservation for the undo log record in + the purge array */ + dulint undo_no;/* undo number of the record */ + ulint rec_type;/* undo log record type: TRX_UNDO_INSERT_REC, + ... */ + btr_pcur_t pcur; /* persistent cursor used in searching the + clustered index record */ + ibool found_clust;/* TRUE if the clustered index record + determined by ref was found in the clustered + index, and we were able to position pcur on + it */ + dict_table_t* table; /* table where purge is done */ + ulint cmpl_info;/* compiler analysis info of an update */ + upd_t* update; /* update vector for a clustered index + record */ + dtuple_t* ref; /* NULL, or row reference to the next row to + handle */ + dtuple_t* row; /* NULL, or a copy (also fields copied to + heap) of the indexed fields of the row to + handle */ + dict_index_t* index; /* NULL, or the next index whose record should + be handled */ + mem_heap_t* heap; /* memory heap used as auxiliary storage for + row; this must be emptied after a successful + purge of a row */ +}; + +#ifndef UNIV_NONINL +#include "row0purge.ic" +#endif + +#endif |