92 lines
3.0 KiB
C++
92 lines
3.0 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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#include "sql/sql_parse.h"
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#include "sql/sql_class.h"
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#include "sql/trans_proc/implicit_savepoint.h"
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namespace im {
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Proc *Trans_proc_implicit_savepoint::instance() {
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static Trans_proc_implicit_savepoint *proc =
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new Trans_proc_implicit_savepoint(key_memory_package);
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return proc;
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}
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Sql_cmd *Trans_proc_implicit_savepoint::evoke_cmd(THD *thd, List<Item> *list) const {
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return new (thd->mem_root) Sql_cmd_trans_proc_implicit_savepoint(thd, list, this);
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}
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/**
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Execute 'ROLLBACK TO savepoint_name' sub statement internally.
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@param[in] thd Thread context
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@retval true Failure
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@retval false Success
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*/
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bool Sql_cmd_trans_proc_implicit_savepoint::pc_execute(THD *thd) {
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DBUG_ENTER("Sql_cmd_trans_proc_implicit_savepoint::pc_execute");
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String cmd;
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Parser_state parser_state;
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/* Save the current context */
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Sub_statement_context stmt_ctx(thd);
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/* Make statement 'ROLLBACK TO savepoint_name' */
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if (cmd.append(STRING_WITH_LEN("ROLLBACK TO ")) ||
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cmd.append("`") ||
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cmd.append(STRING_WITH_LEN(MYSQL_IMPLICIT_SAVEPOINT)) ||
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cmd.append("`"))
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DBUG_RETURN(true);
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thd->set_query(cmd.lex_cstring());
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thd->set_query_id(next_query_id());
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if (parser_state.init(thd, thd->query().str, thd->query().length))
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DBUG_RETURN(true);
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stmt_ctx.start_statement();
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mysql_parse(thd, &parser_state);
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DBUG_RETURN(thd->is_error());
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}
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/**
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Send result to client.
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@param[in] thd Thread context
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@param[in] error Whether current proc runs into error
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*/
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void Sql_cmd_trans_proc_implicit_savepoint::send_result(THD *thd MY_ATTRIBUTE((unused)),
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bool error) {
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DBUG_ENTER("Sql_cmd_trans_proc_implicit_savepoint::send_result");
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if (error) {
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DBUG_ASSERT(thd->is_error());
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}
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DBUG_VOID_RETURN;
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}
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} // namespace im
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