83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/* Copyright (c) 2018, 2021, Alibaba and/or its affiliates. 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, version 2.0,
|
|
as published by the Free Software Foundation.
|
|
This program is also distributed with certain software (including
|
|
but not limited to OpenSSL) that is licensed under separate terms,
|
|
as designated in a particular file or component or in included license
|
|
documentation. The authors of MySQL/PolarDB-X Engine hereby grant you an
|
|
additional permission to link the program and your derivative works with the
|
|
separately licensed software that they have included with
|
|
MySQL/PolarDB-X Engine.
|
|
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, version 2.0, 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 St, Fifth Floor, Boston, MA 02110-1301 USA */
|
|
|
|
|
|
#ifndef SEQUENCE_TRANSACTION_INCLUDED
|
|
#define SEQUENCE_TRANSACTION_INCLUDED
|
|
|
|
#include "sql/sql_sequence.h" // Open_sequence_table_ctx
|
|
|
|
class THD;
|
|
struct TABLE_SHARE;
|
|
|
|
/**
|
|
Sequence updating base table transaction is autonomous:
|
|
Firstly backup current transaction context.
|
|
Secondly commit inner transaction directly.
|
|
At last restore the backed transaction context.
|
|
*/
|
|
class Sequence_transaction {
|
|
public:
|
|
explicit Sequence_transaction(THD *thd, TABLE_SHARE *share);
|
|
|
|
virtual ~Sequence_transaction();
|
|
|
|
/**
|
|
Get opened table context.
|
|
|
|
@retval m_otx Opened table context
|
|
*/
|
|
Open_sequence_table_ctx *get_otx() { return &m_otx; }
|
|
|
|
private:
|
|
Open_sequence_table_ctx m_otx;
|
|
THD *m_thd;
|
|
};
|
|
|
|
/**
|
|
Updating the base sequence table context.
|
|
It will update the base table, and reflush the sequence share cache.
|
|
*/
|
|
class Reload_sequence_cache_ctx {
|
|
public:
|
|
explicit Reload_sequence_cache_ctx(THD *thd, TABLE_SHARE *share)
|
|
: m_trans(thd, share), m_thd(thd), m_saved_in_sub_stmt(thd->in_sub_stmt) {
|
|
thd->in_sub_stmt = false;
|
|
}
|
|
|
|
virtual ~Reload_sequence_cache_ctx();
|
|
/**
|
|
Update the base table and reflush the cache.
|
|
|
|
@param[in] super_table The query opened table.Here will open
|
|
other one to do updating.
|
|
|
|
@retval 0 Success
|
|
@retval ~0 Failure
|
|
*/
|
|
int reload_sequence_cache(TABLE *super_table, void *ctx);
|
|
|
|
private:
|
|
Sequence_transaction m_trans;
|
|
THD *m_thd;
|
|
bool m_saved_in_sub_stmt;
|
|
};
|
|
|
|
#endif
|