← Back to branch summary

~percona-dev/percona-innodb-plugin/percona-innodb-1.0

« back to all changes in this revision

Viewing changes to include/row0purge.h

  • Committer: Vadim Tkachenko
  • Date: 2008-12-01 02:05:57 UTC
  • Revision ID: vadim@percona.com-20081201020557-p7k2m94mjtdg1a83
New rw-locks

Show diffs side-by-side

added added

removed removed

Lines of Context:
include/row0purge.h
 
1
/******************************************************
 
2
Purge obsolete records
 
3
 
 
4
(c) 1997 Innobase Oy
 
5
 
 
6
Created 3/14/1997 Heikki Tuuri
 
7
*******************************************************/
 
8
 
 
9
#ifndef row0purge_h
 
10
#define row0purge_h
 
11
 
 
12
#include "univ.i"
 
13
#include "data0data.h"
 
14
#include "btr0types.h"
 
15
#include "btr0pcur.h"
 
16
#include "dict0types.h"
 
17
#include "trx0types.h"
 
18
#include "que0types.h"
 
19
#include "row0types.h"
 
20
 
 
21
/************************************************************************
 
22
Creates a purge node to a query graph. */
 
23
UNIV_INTERN
 
24
purge_node_t*
 
25
row_purge_node_create(
 
26
/*==================*/
 
27
                                /* out, own: purge node */
 
28
        que_thr_t*      parent, /* in: parent node, i.e., a thr node */
 
29
        mem_heap_t*     heap);  /* in: memory heap where created */
 
30
/***************************************************************
 
31
Does the purge operation for a single undo log record. This is a high-level
 
32
function used in an SQL execution graph. */
 
33
UNIV_INTERN
 
34
que_thr_t*
 
35
row_purge_step(
 
36
/*===========*/
 
37
                                /* out: query thread to run next or NULL */
 
38
        que_thr_t*      thr);   /* in: query thread */
 
39
 
 
40
/* Purge node structure */
 
41
 
 
42
struct purge_node_struct{
 
43
        que_common_t    common; /* node type: QUE_NODE_PURGE */
 
44
        /*----------------------*/
 
45
        /* Local storage for this graph node */
 
46
        dulint          roll_ptr;/* roll pointer to undo log record */
 
47
        trx_undo_rec_t* undo_rec;/* undo log record */
 
48
        trx_undo_inf_t* reservation;/* reservation for the undo log record in
 
49
                                the purge array */
 
50
        dulint          undo_no;/* undo number of the record */
 
51
        ulint           rec_type;/* undo log record type: TRX_UNDO_INSERT_REC,
 
52
                                ... */
 
53
        btr_pcur_t      pcur;   /* persistent cursor used in searching the
 
54
                                clustered index record */
 
55
        ibool           found_clust;/* TRUE if the clustered index record
 
56
                                determined by ref was found in the clustered
 
57
                                index, and we were able to position pcur on
 
58
                                it */
 
59
        dict_table_t*   table;  /* table where purge is done */
 
60
        ulint           cmpl_info;/* compiler analysis info of an update */
 
61
        upd_t*          update; /* update vector for a clustered index
 
62
                                record */
 
63
        dtuple_t*       ref;    /* NULL, or row reference to the next row to
 
64
                                handle */
 
65
        dtuple_t*       row;    /* NULL, or a copy (also fields copied to
 
66
                                heap) of the indexed fields of the row to
 
67
                                handle */
 
68
        dict_index_t*   index;  /* NULL, or the next index whose record should
 
69
                                be handled */
 
70
        mem_heap_t*     heap;   /* memory heap used as auxiliary storage for
 
71
                                row; this must be emptied after a successful
 
72
                                purge of a row */
 
73
};
 
74
 
 
75
#ifndef UNIV_NONINL
 
76
#include "row0purge.ic"
 
77
#endif
 
78
 
 
79
#endif