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the begginning

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david hill
2016-01-06 14:08:59 -06:00
parent 66a31debcb
commit f6afc42dd0
18251 changed files with 16460679 additions and 2 deletions
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109
dbcon/mysql/ha_select_sub.cpp Normal file
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/* Copyright (C) 2014 InfiniDB, Inc.
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; version 2 of
the License.
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., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA. */
/***********************************************************************
* $Id: ha_select_sub.cpp 9210 2013-01-21 14:10:42Z rdempsey $
*
*
***********************************************************************/
/** class SelectSubQuery definition */
//#define NDEBUG
#include <cassert>
using namespace std;
#include "idb_mysql.h"
#include "parsetree.h"
#include "logicoperator.h"
#include "selectfilter.h"
#include "simplescalarfilter.h"
#include "predicateoperator.h"
#include "rowcolumn.h"
#include "simplecolumn.h"
using namespace execplan;
#include "errorids.h"
using namespace logging;
#include "ha_subquery.h"
namespace cal_impl_if
{
SelectSubQuery::SelectSubQuery(gp_walk_info& gwip) : SubQuery(gwip), fSelSub (NULL)
{}
SelectSubQuery::SelectSubQuery(gp_walk_info& gwip, Item_subselect* selSub) :
SubQuery(gwip),
fSelSub(selSub)
{}
SelectSubQuery::~SelectSubQuery()
{}
SCSEP SelectSubQuery::transform()
{
idbassert(fSelSub);
SCSEP csep(new CalpontSelectExecutionPlan());
csep->sessionID(fGwip.sessionid);
csep->subType (CalpontSelectExecutionPlan::SELECT_SUBS);
// gwi for the sub query
gp_walk_info gwi;
gwi.thd = fGwip.thd;
gwi.subQuery = this;
// @4632 merge table list to gwi in case there is FROM sub to be referenced
// in the SELECT sub
gwi.derivedTbCnt = fGwip.derivedTbList.size();
uint32_t tbCnt = fGwip.tbList.size();
gwi.tbList.insert(gwi.tbList.begin(), fGwip.tbList.begin(), fGwip.tbList.end());
gwi.derivedTbList.insert(gwi.derivedTbList.begin(), fGwip.derivedTbList.begin(), fGwip.derivedTbList.end());
if (getSelectPlan(gwi, *(fSelSub->get_select_lex()), csep) != 0)
{
if (!gwi.fatalParseError)
{
fGwip.fatalParseError = true;
fGwip.parseErrorText = "Error occured in SelectSubQuery::transform()";
}
else
{
fGwip.fatalParseError = gwi.fatalParseError;
fGwip.parseErrorText = gwi.parseErrorText;
}
csep.reset();
return csep;
}
fGwip.subselectList.push_back(csep);
// remove outer query tables
CalpontSelectExecutionPlan::TableList tblist;
if (csep->tableList().size() >= tbCnt)
tblist.insert(tblist.begin(),csep->tableList().begin()+tbCnt, csep->tableList().end());
CalpontSelectExecutionPlan::SelectList derivedTbList;
if (csep->derivedTableList().size() >= gwi.derivedTbCnt)
derivedTbList.insert(derivedTbList.begin(), csep->derivedTableList().begin()+gwi.derivedTbCnt, csep->derivedTableList().end());
csep->tableList(tblist);
csep->derivedTableList(derivedTbList);
return csep;
}
}