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97 lines
3.7 KiB
C
97 lines
3.7 KiB
C
/*****************************************************************************
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Copyright (c) 1996, 2016, Oracle and/or its affiliates. All Rights Reserved.
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Copyright (c) 2015, 2021, MariaDB Corporation.
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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.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/trx0roll.h
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Transaction rollback
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Created 3/26/1996 Heikki Tuuri
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*******************************************************/
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#ifndef trx0roll_h
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#define trx0roll_h
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#include "trx0trx.h"
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#include "mtr0mtr.h"
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#include "trx0sys.h"
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extern tpool::task_group rollback_all_recovered_group;
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extern tpool::waitable_task rollback_all_recovered_task;
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extern const trx_t* trx_roll_crash_recv_trx;
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/** Report progress when rolling back a row of a recovered transaction. */
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void trx_roll_report_progress();
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/*******************************************************************//**
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Rollback or clean up any incomplete transactions which were
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encountered in crash recovery. If the transaction already was
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committed, then we clean up a possible insert undo log. If the
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transaction was not yet committed, then we roll it back.
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@param all true=roll back all recovered active transactions;
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false=roll back any incomplete dictionary transaction */
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void
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trx_rollback_recovered(bool all);
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/*******************************************************************//**
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Rollback or clean up any incomplete transactions which were
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encountered in crash recovery. If the transaction already was
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committed, then we clean up a possible insert undo log. If the
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transaction was not yet committed, then we roll it back.
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Note: this is done in a background thread. */
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void trx_rollback_all_recovered(void*);
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/*********************************************************************//**
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Creates a rollback command node struct.
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@return own: rollback node struct */
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roll_node_t*
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roll_node_create(
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/*=============*/
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mem_heap_t* heap); /*!< in: mem heap where created */
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/***********************************************************//**
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Performs an execution step for a rollback command node in a query graph.
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@return query thread to run next, or NULL */
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que_thr_t*
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trx_rollback_step(
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/*==============*/
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que_thr_t* thr); /*!< in: query thread */
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/*******************************************************************//**
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Rollback a transaction used in MySQL.
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@return error code or DB_SUCCESS */
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dberr_t
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trx_rollback_for_mysql(
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/*===================*/
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trx_t* trx) /*!< in/out: transaction */
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MY_ATTRIBUTE((nonnull));
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/** Rollback node states */
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enum roll_node_state {
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ROLL_NODE_NONE = 0, /*!< Unknown state */
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ROLL_NODE_SEND, /*!< about to send a rollback signal to
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the transaction */
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ROLL_NODE_WAIT /*!< rollback signal sent to the
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transaction, waiting for completion */
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};
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/** Rollback command node in a query graph */
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struct roll_node_t{
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que_common_t common; /*!< node type: QUE_NODE_ROLLBACK */
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enum roll_node_state state; /*!< node execution state */
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undo_no_t savept; /*!< savepoint to which to
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roll back; 0=entire transaction */
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que_thr_t* undo_thr;/*!< undo query graph */
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};
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#endif
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