Code_query_repeat.cpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:2k
源码类别:
MySQL数据库
开发平台:
Visual C++
- /* Copyright (C) 2003 MySQL AB
- 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; either version 2 of the License, or
- (at your option) any later version.
- 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #include "Code_query_repeat.hpp"
- #include "Code_root.hpp"
- // Plan_query_repeat
- Plan_query_repeat::~Plan_query_repeat()
- {
- }
- Plan_base*
- Plan_query_repeat::analyze(Ctx& ctx, Ctl& ctl)
- {
- return this;
- }
- Exec_base*
- Plan_query_repeat::codegen(Ctx& ctx, Ctl& ctl)
- {
- Exec_query_repeat* exec = new Exec_query_repeat(ctl.m_execRoot);
- ctl.m_execRoot->saveNode(exec);
- // SqlSpecs is empty
- const SqlSpecs sqlSpecs(0);
- Exec_query_repeat::Code& code = *new Exec_query_repeat::Code(sqlSpecs, m_forever, m_maxcount);
- exec->setCode(code);
- return exec;
- }
- void
- Plan_query_repeat::print(Ctx& ctx)
- {
- ctx.print(" [query_repeat");
- if (! m_forever)
- ctx.print(" %ld", (long)m_maxcount);
- ctx.print("]");
- }
- // Exec_query_repeat
- Exec_query_repeat::Code::~Code()
- {
- }
- Exec_query_repeat::Data::~Data()
- {
- }
- Exec_query_repeat::~Exec_query_repeat()
- {
- }
- void
- Exec_query_repeat::alloc(Ctx& ctx, Ctl& ctl)
- {
- const Code& code = getCode();
- // SqlRow is empty
- Data& data = *new Data(this, code.sqlSpecs());
- setData(data);
- }
- void
- Exec_query_repeat::execImpl(Ctx& ctx, Ctl& ctl)
- {
- Data& data = getData();
- data.m_count = 0;
- }
- bool
- Exec_query_repeat::fetchImpl(Ctx& ctx, Ctl& ctl)
- {
- const Code& code = getCode();
- Data& data = getData();
- // fetch until count is up
- if (code.m_forever || data.m_count < code.m_maxcount) {
- data.m_count++;
- return true;
- }
- return false;
- }
- void
- Exec_query_repeat::close(Ctx& ctx)
- {
- }
- void
- Exec_query_repeat::print(Ctx& ctx)
- {
- const Code& code = getCode();
- ctx.print(" [query_repeat");
- if (! code.m_forever)
- ctx.print(" %ld", (long)code.m_maxcount);
- ctx.print("]");
- }