1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*****************************************************************************
Copyright (c) 1996, 2016, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2015, 2021, MariaDB Corporation.
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
*****************************************************************************/
/**************************************************//**
@file include/trx0roll.h
Transaction rollback
Created 3/26/1996 Heikki Tuuri
*******************************************************/
#ifndef trx0roll_h
#define trx0roll_h
#include "trx0trx.h"
#include "mtr0mtr.h"
#include "trx0sys.h"
extern tpool::task_group rollback_all_recovered_group;
extern tpool::waitable_task rollback_all_recovered_task;
extern const trx_t* trx_roll_crash_recv_trx;
/** Report progress when rolling back a row of a recovered transaction. */
void trx_roll_report_progress();
/*******************************************************************//**
Rollback or clean up any incomplete transactions which were
encountered in crash recovery. If the transaction already was
committed, then we clean up a possible insert undo log. If the
transaction was not yet committed, then we roll it back.
@param all true=roll back all recovered active transactions;
false=roll back any incomplete dictionary transaction */
void
trx_rollback_recovered(bool all);
/*******************************************************************//**
Rollback or clean up any incomplete transactions which were
encountered in crash recovery. If the transaction already was
committed, then we clean up a possible insert undo log. If the
transaction was not yet committed, then we roll it back.
Note: this is done in a background thread. */
void trx_rollback_all_recovered(void*);
/*********************************************************************//**
Creates a rollback command node struct.
@return own: rollback node struct */
roll_node_t*
roll_node_create(
/*=============*/
mem_heap_t* heap); /*!< in: mem heap where created */
/***********************************************************//**
Performs an execution step for a rollback command node in a query graph.
@return query thread to run next, or NULL */
que_thr_t*
trx_rollback_step(
/*==============*/
que_thr_t* thr); /*!< in: query thread */
/*******************************************************************//**
Rollback a transaction used in MySQL.
@return error code or DB_SUCCESS */
dberr_t
trx_rollback_for_mysql(
/*===================*/
trx_t* trx) /*!< in/out: transaction */
MY_ATTRIBUTE((nonnull));
/** Rollback node states */
enum roll_node_state {
ROLL_NODE_NONE = 0, /*!< Unknown state */
ROLL_NODE_SEND, /*!< about to send a rollback signal to
the transaction */
ROLL_NODE_WAIT /*!< rollback signal sent to the
transaction, waiting for completion */
};
/** Rollback command node in a query graph */
struct roll_node_t{
que_common_t common; /*!< node type: QUE_NODE_ROLLBACK */
enum roll_node_state state; /*!< node execution state */
undo_no_t savept; /*!< savepoint to which to
roll back; 0=entire transaction */
que_thr_t* undo_thr;/*!< undo query graph */
};
#endif
|
