84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
/* Copyright (c) 2018, 2021, Alibaba and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL/PolarDB-X Engine hereby grant you an
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additional permission to link the program and your derivative works with the
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separately licensed software that they have included with
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MySQL/PolarDB-X Engine.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef TIMESTAMP_SERVICE_INCLUDED
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#define TIMESTAMP_SERVICE_INCLUDED
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#include "my_inttypes.h"
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#include "sql_class.h"
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#include "sql_lex.h"
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/* error number sent to client */
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#define GTS_SUCCESS 0
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#define GTS_INIT_FAILED 1
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#define GTS_SERVICE_ERROR 2
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class TimestampService {
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public:
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TimestampService(THD *thd, const char *db_name, const char *table_name)
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: m_thd(thd),
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m_db_name(db_name),
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m_table_name(table_name),
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m_db_name_len(strlen(db_name)),
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m_table_name_len(strlen(table_name)),
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m_table(NULL),
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m_initialized(false) {};
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/* Initialization for getting timestamp value */
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bool init();
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/* Release resource and state cleanup */
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void deinit();
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/* Open the base SEQUENCE table */
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bool open_base_table(thr_lock_type lock_type);
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/* Get next timestamp value */
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bool get_timestamp(uint64_t &ts, const uint64_t batch = 1);
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bool is_initialized() { return m_initialized; }
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~TimestampService(){};
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private:
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/* Used to open the base table */
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THD *m_thd;
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/* Name of base table and db */
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const char *m_db_name;
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const char *m_table_name;
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uint m_db_name_len;
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uint m_table_name_len;
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/* Handler of the base table */
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TABLE *m_table;
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bool m_initialized;
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/* Backup query tables */
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Query_tables_list m_query_tables_backup;
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/* Backup open tables */
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Open_tables_backup m_state_backup;
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};
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#endif
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