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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #include "file/fanalyzer.hxx"
21 : #include "connectivity/sqlparse.hxx"
22 : #include <osl/diagnose.h>
23 : #include <tools/debug.hxx>
24 : #include <comphelper/extract.hxx>
25 : #include "connectivity/sqlnode.hxx"
26 : #include "connectivity/dbexception.hxx"
27 : #include "file/FConnection.hxx"
28 : #include "resource/file_res.hrc"
29 :
30 : using namespace ::connectivity;
31 : using namespace ::connectivity::file;
32 : using namespace ::com::sun::star::uno;
33 : using namespace ::com::sun::star::beans;
34 : using namespace ::com::sun::star::sdbc;
35 : using namespace ::com::sun::star::container;
36 :
37 : DBG_NAME( file_OSQLAnalyzer )
38 : //------------------------------------------------------------------
39 0 : OSQLAnalyzer::OSQLAnalyzer(OConnection* _pConnection)
40 : :m_pConnection(_pConnection)
41 : ,m_bHasSelectionCode(sal_False)
42 0 : ,m_bSelectionFirstTime(sal_True)
43 : {
44 : DBG_CTOR( file_OSQLAnalyzer, NULL );
45 0 : m_aCompiler = new OPredicateCompiler(this);
46 0 : m_aInterpreter = new OPredicateInterpreter(m_aCompiler);
47 0 : }
48 :
49 : // -----------------------------------------------------------------------------
50 0 : OSQLAnalyzer::~OSQLAnalyzer()
51 : {
52 : DBG_DTOR( file_OSQLAnalyzer, NULL );
53 0 : }
54 :
55 : // -----------------------------------------------------------------------------
56 0 : void OSQLAnalyzer::setIndexes(const Reference< XNameAccess>& _xIndexes)
57 : {
58 0 : m_aCompiler->m_xIndexes = _xIndexes;
59 0 : }
60 : //------------------------------------------------------------------
61 0 : void OSQLAnalyzer::start(OSQLParseNode* pSQLParseNode)
62 : {
63 0 : if (SQL_ISRULE(pSQLParseNode,select_statement))
64 : {
65 : DBG_ASSERT(pSQLParseNode->count() >= 4,"OFILECursor: Fehler im Parse Tree");
66 :
67 : // check that we don't use anything other than count(*) as function
68 0 : OSQLParseNode* pSelection = pSQLParseNode->getChild(2);
69 0 : if ( SQL_ISRULE(pSelection,scalar_exp_commalist) )
70 : {
71 0 : for (sal_uInt32 i = 0; i < pSelection->count(); i++)
72 : {
73 0 : OSQLParseNode *pColumnRef = pSelection->getChild(i)->getChild(0);
74 0 : if ( ( SQL_ISRULE(pColumnRef,set_fct_spec) && pColumnRef->count() == 4 )
75 0 : || SQL_ISRULE(pColumnRef,char_value_fct)
76 0 : || SQL_ISRULE(pColumnRef,char_substring_fct)
77 0 : || SQL_ISRULE(pColumnRef,position_exp)
78 0 : || SQL_ISRULE(pColumnRef,fold)
79 0 : || SQL_ISRULE(pColumnRef,length_exp)
80 0 : || SQL_ISRULE(pColumnRef,num_value_exp)
81 0 : || SQL_ISRULE(pColumnRef,term)
82 0 : || SQL_ISRULE(pColumnRef,factor)
83 0 : || SQL_ISRULE(pColumnRef,set_fct_spec) )
84 : {
85 0 : ::rtl::Reference<OPredicateCompiler> pCompiler = new OPredicateCompiler(this);
86 0 : pCompiler->setOrigColumns(m_aCompiler->getOrigColumns());
87 0 : ::rtl::Reference<OPredicateInterpreter> pInterpreter = new OPredicateInterpreter(pCompiler);
88 0 : pCompiler->execute( pColumnRef );
89 0 : m_aSelectionEvaluations.push_back( TPredicates(pCompiler,pInterpreter) );
90 : }
91 0 : else if ( ( SQL_ISRULE(pColumnRef,general_set_fct) && pColumnRef->count() != 4 ) )
92 : {
93 0 : m_pConnection->throwGenericSQLException(STR_QUERY_COMPLEX_COUNT,NULL);
94 : }
95 : else
96 : {
97 0 : if ( SQL_ISPUNCTUATION( pColumnRef, "*" )
98 0 : || ( SQL_ISRULE( pColumnRef, column_ref )
99 0 : && ( pColumnRef->count() == 3 )
100 0 : && ( pColumnRef->getChild(0)->getNodeType() == SQL_NODE_NAME )
101 0 : && SQL_ISPUNCTUATION( pColumnRef->getChild(1), "." )
102 0 : && SQL_ISRULE( pColumnRef->getChild(2), column_val )
103 0 : && SQL_ISPUNCTUATION( pColumnRef->getChild(2)->getChild(0), "*" )
104 : )
105 : )
106 : {
107 : // push one element for each column of our table
108 0 : const Reference< XNameAccess > xColumnNames( m_aCompiler->getOrigColumns() );
109 0 : const Sequence< ::rtl::OUString > aColumnNames( xColumnNames->getElementNames() );
110 0 : for ( sal_Int32 j=0; j<aColumnNames.getLength(); ++j )
111 0 : m_aSelectionEvaluations.push_back( TPredicates() );
112 : }
113 : else
114 0 : m_aSelectionEvaluations.push_back( TPredicates() );
115 : }
116 : }
117 : }
118 : }
119 :
120 0 : m_aCompiler->start(pSQLParseNode);
121 0 : }
122 :
123 : //------------------------------------------------------------------
124 0 : void OSQLAnalyzer::bindRow(OCodeList& rCodeList,const OValueRefRow& _pRow,OEvaluateSetList& _rEvaluateSetList)
125 : {
126 : // count criteria
127 : // if only one criterion, and the corresponding field is indexed
128 : // then the index will be used
129 0 : OEvaluateSet* pEvaluateSet = NULL;
130 :
131 0 : for (OCodeList::iterator aIter = rCodeList.begin(); aIter != rCodeList.end(); ++aIter)
132 : {
133 0 : OOperandAttr* pAttr = PTR_CAST(OOperandAttr,(*aIter));
134 0 : if (pAttr)
135 : {
136 0 : if (pAttr->isIndexed() && !m_aCompiler->hasORCondition())
137 : {
138 0 : OCode* pCode1 = *(aIter + 1);
139 0 : OCode* pCode2 = *(aIter + 2);
140 :
141 0 : if (PTR_CAST(OOperand,pCode1))
142 0 : pEvaluateSet = pAttr->preProcess(PTR_CAST(OBoolOperator,pCode2), PTR_CAST(OOperand,pCode1));
143 : else
144 0 : pEvaluateSet = pAttr->preProcess(PTR_CAST(OBoolOperator,pCode1));
145 : }
146 :
147 0 : if (pEvaluateSet)
148 : {
149 0 : _rEvaluateSetList.push_back(pEvaluateSet);
150 0 : pEvaluateSet = NULL;
151 : }
152 0 : pAttr->bindValue(_pRow);
153 : }
154 : }
155 0 : }
156 : //------------------------------------------------------------------
157 0 : void OSQLAnalyzer::bindSelectRow(const OValueRefRow& _pRow)
158 : {
159 : // first the select part
160 0 : OEvaluateSetList aEvaluateSetList;
161 0 : for ( ::std::vector< TPredicates >::iterator aIter = m_aSelectionEvaluations.begin(); aIter != m_aSelectionEvaluations.end();++aIter)
162 : {
163 0 : if ( aIter->first.is() )
164 0 : bindRow( aIter->first->m_aCodeList,_pRow,aEvaluateSetList);
165 0 : }
166 0 : }
167 : //------------------------------------------------------------------
168 0 : ::std::vector<sal_Int32>* OSQLAnalyzer::bindEvaluationRow(OValueRefRow& _pRow)
169 : {
170 0 : OEvaluateSetList aEvaluateSetList;
171 0 : bindRow( m_aCompiler->m_aCodeList,_pRow,aEvaluateSetList);
172 :
173 0 : ::std::vector<sal_Int32>* pKeySet = NULL;
174 0 : OEvaluateSet* pEvaluateSet = NULL;
175 :
176 : // create Keyset with smallest list
177 0 : if(!aEvaluateSetList.empty())
178 : {
179 : // which list has the smallest count?
180 0 : OEvaluateSetList::iterator i = aEvaluateSetList.begin();
181 0 : pEvaluateSet = *(i);
182 0 : for(++i; i != aEvaluateSetList.end();++i)
183 : {
184 0 : OEvaluateSet* pEvaluateSetComp = (*i);
185 0 : for(OEvaluateSet::reverse_iterator j = pEvaluateSet->rbegin(); j != pEvaluateSet->rend(); ++j)
186 : {
187 0 : if (pEvaluateSetComp->find(j->second) != pEvaluateSetComp->end())
188 0 : pEvaluateSet->erase(j->second);
189 : }
190 : }
191 0 : pKeySet = new ::std::vector<sal_Int32>(pEvaluateSet->size());
192 0 : sal_Int32 k=0;
193 0 : for(OEvaluateSet::iterator j = pEvaluateSet->begin(); j != pEvaluateSet->end(); ++j,++k)
194 : {
195 0 : (*pKeySet)[k] = j->second;
196 : }
197 :
198 : // delete all
199 0 : for(i = aEvaluateSetList.begin(); i != aEvaluateSetList.end();++i)
200 0 : delete (*i);
201 : }
202 :
203 0 : return pKeySet;
204 : }
205 :
206 : // -----------------------------------------------------------------------------
207 0 : OOperandAttr* OSQLAnalyzer::createOperandAttr(sal_Int32 _nPos,
208 : const Reference< XPropertySet>& _xCol,
209 : const Reference< XNameAccess>& /*_xIndexes*/)
210 : {
211 0 : return new OOperandAttr(static_cast<sal_uInt16>(_nPos),_xCol);
212 : }
213 : // -----------------------------------------------------------------------------
214 0 : sal_Bool OSQLAnalyzer::hasRestriction() const
215 : {
216 0 : return m_aCompiler->hasCode();
217 : }
218 : // -----------------------------------------------------------------------------
219 0 : sal_Bool OSQLAnalyzer::hasFunctions() const
220 : {
221 0 : if ( m_bSelectionFirstTime )
222 : {
223 0 : m_bSelectionFirstTime = sal_False;
224 0 : for ( ::std::vector< TPredicates >::const_iterator aIter = m_aSelectionEvaluations.begin(); aIter != m_aSelectionEvaluations.end() && !m_bHasSelectionCode ;++aIter)
225 : {
226 0 : if ( aIter->first.is() )
227 0 : m_bHasSelectionCode = aIter->first->hasCode();
228 : }
229 : }
230 0 : return m_bHasSelectionCode;
231 : }
232 : // -----------------------------------------------------------------------------
233 0 : void OSQLAnalyzer::setSelectionEvaluationResult(OValueRefRow& _pRow,const ::std::vector<sal_Int32>& _rColumnMapping)
234 : {
235 0 : sal_Int32 nPos = 1;
236 0 : for ( ::std::vector< TPredicates >::iterator aIter = m_aSelectionEvaluations.begin(); aIter != m_aSelectionEvaluations.end();++aIter,++nPos)
237 : {
238 0 : if ( aIter->second.is() )
239 : {
240 : // the first column (index 0) is for convenience only. The first real select column is no 1.
241 0 : sal_Int32 map = nPos;
242 0 : if ( nPos < static_cast< sal_Int32 >( _rColumnMapping.size() ) )
243 0 : map = _rColumnMapping[nPos];
244 0 : if ( map > 0 )
245 0 : aIter->second->startSelection( (_pRow->get())[map] );
246 : }
247 : }
248 0 : }
249 : // -----------------------------------------------------------------------------
250 0 : void OSQLAnalyzer::dispose()
251 : {
252 0 : m_aCompiler->dispose();
253 0 : for ( ::std::vector< TPredicates >::iterator aIter = m_aSelectionEvaluations.begin(); aIter != m_aSelectionEvaluations.end();++aIter)
254 : {
255 0 : if ( aIter->first.is() )
256 0 : aIter->first->dispose();
257 : }
258 0 : }
259 : // -----------------------------------------------------------------------------
260 0 : void OSQLAnalyzer::setOrigColumns(const OFileColumns& rCols)
261 : {
262 0 : m_aCompiler->setOrigColumns(rCols);
263 0 : for ( ::std::vector< TPredicates >::iterator aIter = m_aSelectionEvaluations.begin(); aIter != m_aSelectionEvaluations.end();++aIter)
264 : {
265 0 : if ( aIter->first.is() )
266 0 : aIter->first->setOrigColumns(rCols);
267 : }
268 0 : }
269 : // -----------------------------------------------------------------------------
270 :
271 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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