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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include "file/fanalyzer.hxx"
#include <connectivity/sqlparse.hxx>
#include <osl/diagnose.h>
#include <tools/debug.hxx>
#include <comphelper/extract.hxx>
#include <connectivity/sqlnode.hxx>
#include <connectivity/dbexception.hxx>
#include "file/FConnection.hxx"
#include "resource/file_res.hrc"
using namespace ::connectivity;
using namespace ::connectivity::file;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::sdbc;
using namespace ::com::sun::star::container;
OSQLAnalyzer::OSQLAnalyzer(OConnection* _pConnection)
:m_pConnection(_pConnection)
,m_bHasSelectionCode(false)
,m_bSelectionFirstTime(true)
{
m_aCompiler = new OPredicateCompiler(this);
m_aInterpreter = new OPredicateInterpreter(m_aCompiler);
}
OSQLAnalyzer::~OSQLAnalyzer()
{
}
void OSQLAnalyzer::setIndexes(const Reference< XNameAccess>& _xIndexes)
{
m_aCompiler->m_xIndexes = _xIndexes;
}
void OSQLAnalyzer::start(OSQLParseNode* pSQLParseNode)
{
if (SQL_ISRULE(pSQLParseNode,select_statement))
{
DBG_ASSERT(pSQLParseNode->count() >= 4,"OFILECursor: Fehler im Parse Tree");
// check that we don't use anything other than count(*) as function
OSQLParseNode* pSelection = pSQLParseNode->getChild(2);
if ( SQL_ISRULE(pSelection,scalar_exp_commalist) )
{
for (sal_uInt32 i = 0; i < pSelection->count(); i++)
{
OSQLParseNode *pColumnRef = pSelection->getChild(i)->getChild(0);
if ( ( SQL_ISRULE(pColumnRef,set_fct_spec) && pColumnRef->count() == 4 )
|| SQL_ISRULE(pColumnRef,char_value_fct)
|| SQL_ISRULE(pColumnRef,char_substring_fct)
|| SQL_ISRULE(pColumnRef,position_exp)
|| SQL_ISRULE(pColumnRef,fold)
|| SQL_ISRULE(pColumnRef,length_exp)
|| SQL_ISRULE(pColumnRef,num_value_exp)
|| SQL_ISRULE(pColumnRef,term)
|| SQL_ISRULE(pColumnRef,factor)
|| SQL_ISRULE(pColumnRef,set_fct_spec) )
{
::rtl::Reference<OPredicateCompiler> pCompiler = new OPredicateCompiler(this);
pCompiler->setOrigColumns(m_aCompiler->getOrigColumns());
::rtl::Reference<OPredicateInterpreter> pInterpreter = new OPredicateInterpreter(pCompiler);
pCompiler->execute( pColumnRef );
m_aSelectionEvaluations.push_back( TPredicates(pCompiler,pInterpreter) );
}
else if ( ( SQL_ISRULE(pColumnRef,general_set_fct) && pColumnRef->count() != 4 ) )
{
m_pConnection->throwGenericSQLException(STR_QUERY_COMPLEX_COUNT,NULL);
}
else
{
if ( SQL_ISPUNCTUATION( pColumnRef, "*" )
|| ( SQL_ISRULE( pColumnRef, column_ref )
&& ( pColumnRef->count() == 3 )
&& ( pColumnRef->getChild(0)->getNodeType() == SQL_NODE_NAME )
&& SQL_ISPUNCTUATION( pColumnRef->getChild(1), "." )
&& SQL_ISRULE( pColumnRef->getChild(2), column_val )
&& SQL_ISPUNCTUATION( pColumnRef->getChild(2)->getChild(0), "*" )
)
)
{
// push one element for each column of our table
const Reference< XNameAccess > xColumnNames( m_aCompiler->getOrigColumns() );
const Sequence< OUString > aColumnNames( xColumnNames->getElementNames() );
for ( sal_Int32 j=0; j<aColumnNames.getLength(); ++j )
m_aSelectionEvaluations.push_back( TPredicates() );
}
else
m_aSelectionEvaluations.push_back( TPredicates() );
}
}
}
}
m_aCompiler->start(pSQLParseNode);
}
void OSQLAnalyzer::bindRow(OCodeList& rCodeList,const OValueRefRow& _pRow,OEvaluateSetList& _rEvaluateSetList)
{
// count criteria
// if only one criterion, and the corresponding field is indexed
// then the index will be used
OEvaluateSet* pEvaluateSet = NULL;
for (OCodeList::iterator aIter = rCodeList.begin(); aIter != rCodeList.end(); ++aIter)
{
OOperandAttr* pAttr = PTR_CAST(OOperandAttr,(*aIter));
if (pAttr)
{
if (pAttr->isIndexed() && !m_aCompiler->hasORCondition())
{
OCode* pCode1 = *(aIter + 1);
OCode* pCode2 = *(aIter + 2);
if (PTR_CAST(OOperand,pCode1))
pEvaluateSet = pAttr->preProcess(PTR_CAST(OBoolOperator,pCode2), PTR_CAST(OOperand,pCode1));
else
pEvaluateSet = pAttr->preProcess(PTR_CAST(OBoolOperator,pCode1));
}
if (pEvaluateSet)
{
_rEvaluateSetList.push_back(pEvaluateSet);
pEvaluateSet = NULL;
}
pAttr->bindValue(_pRow);
}
}
}
void OSQLAnalyzer::bindSelectRow(const OValueRefRow& _pRow)
{
// first the select part
OEvaluateSetList aEvaluateSetList;
for ( ::std::vector< TPredicates >::iterator aIter = m_aSelectionEvaluations.begin(); aIter != m_aSelectionEvaluations.end();++aIter)
{
if ( aIter->first.is() )
bindRow( aIter->first->m_aCodeList,_pRow,aEvaluateSetList);
}
}
::std::vector<sal_Int32>* OSQLAnalyzer::bindEvaluationRow(OValueRefRow& _pRow)
{
OEvaluateSetList aEvaluateSetList;
bindRow( m_aCompiler->m_aCodeList,_pRow,aEvaluateSetList);
::std::vector<sal_Int32>* pKeySet = NULL;
OEvaluateSet* pEvaluateSet = NULL;
// create Keyset with smallest list
if(!aEvaluateSetList.empty())
{
// which list has the smallest count?
OEvaluateSetList::iterator i = aEvaluateSetList.begin();
pEvaluateSet = *(i);
for(++i; i != aEvaluateSetList.end();++i)
{
OEvaluateSet* pEvaluateSetComp = (*i);
for(OEvaluateSet::reverse_iterator j = pEvaluateSet->rbegin(); j != pEvaluateSet->rend(); ++j)
{
if (pEvaluateSetComp->find(j->second) != pEvaluateSetComp->end())
pEvaluateSet->erase(j->second);
}
}
pKeySet = new ::std::vector<sal_Int32>(pEvaluateSet->size());
sal_Int32 k=0;
for(OEvaluateSet::iterator j = pEvaluateSet->begin(); j != pEvaluateSet->end(); ++j,++k)
{
(*pKeySet)[k] = j->second;
}
// delete all
for(i = aEvaluateSetList.begin(); i != aEvaluateSetList.end();++i)
delete (*i);
}
return pKeySet;
}
OOperandAttr* OSQLAnalyzer::createOperandAttr(sal_Int32 _nPos,
const Reference< XPropertySet>& _xCol,
const Reference< XNameAccess>& /*_xIndexes*/)
{
return new OOperandAttr(static_cast<sal_uInt16>(_nPos),_xCol);
}
bool OSQLAnalyzer::hasRestriction() const
{
return m_aCompiler->hasCode();
}
bool OSQLAnalyzer::hasFunctions() const
{
if ( m_bSelectionFirstTime )
{
m_bSelectionFirstTime = false;
for ( ::std::vector< TPredicates >::const_iterator aIter = m_aSelectionEvaluations.begin(); aIter != m_aSelectionEvaluations.end() && !m_bHasSelectionCode ;++aIter)
{
if ( aIter->first.is() )
m_bHasSelectionCode = aIter->first->hasCode();
}
}
return m_bHasSelectionCode;
}
void OSQLAnalyzer::setSelectionEvaluationResult(OValueRefRow& _pRow,const ::std::vector<sal_Int32>& _rColumnMapping)
{
sal_Int32 nPos = 1;
for ( ::std::vector< TPredicates >::iterator aIter = m_aSelectionEvaluations.begin(); aIter != m_aSelectionEvaluations.end();++aIter,++nPos)
{
if ( aIter->second.is() )
{
// the first column (index 0) is for convenience only. The first real select column is no 1.
sal_Int32 map = nPos;
if ( nPos < static_cast< sal_Int32 >( _rColumnMapping.size() ) )
map = _rColumnMapping[nPos];
if ( map > 0 )
aIter->second->startSelection( (_pRow->get())[map] );
}
}
}
void OSQLAnalyzer::dispose()
{
m_aCompiler->dispose();
for ( ::std::vector< TPredicates >::iterator aIter = m_aSelectionEvaluations.begin(); aIter != m_aSelectionEvaluations.end();++aIter)
{
if ( aIter->first.is() )
aIter->first->dispose();
}
}
void OSQLAnalyzer::setOrigColumns(const OFileColumns& rCols)
{
m_aCompiler->setOrigColumns(rCols);
for ( ::std::vector< TPredicates >::iterator aIter = m_aSelectionEvaluations.begin(); aIter != m_aSelectionEvaluations.end();++aIter)
{
if ( aIter->first.is() )
aIter->first->setOrigColumns(rCols);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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