path: root/dbaccess/source/core/api/OptimisticSet.cxx

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 * 
 * Copyright 2008 by Sun Microsystems, Inc.
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 * OpenOffice.org - a multi-platform office productivity suite
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 * $RCSfile: OptimisticSet.cxx,v $
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_dbaccess.hxx"

#include "OptimisticSet.hxx"
#include "core_resource.hxx"
#include "core_resource.hrc"
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/sdbc/XDatabaseMetaData.hpp>
#include <com/sun/star/sdbc/ColumnValue.hpp>
#include <com/sun/star/sdbc/XPreparedStatement.hpp>
#include <com/sun/star/sdbc/XParameters.hpp>
#include <com/sun/star/sdbc/XGeneratedResultSet.hpp>
#include <com/sun/star/sdb/XSingleSelectQueryComposer.hpp>
#include <com/sun/star/sdb/SQLFilterOperator.hpp>
#include <com/sun/star/sdbc/XColumnLocate.hpp>
#include <com/sun/star/container/XIndexAccess.hpp>
#include "dbastrings.hrc"
#include "apitools.hxx"
#include <com/sun/star/sdbcx/XKeysSupplier.hpp>
#include <com/sun/star/sdb/XSingleSelectQueryComposer.hpp>
#include <com/sun/star/sdbcx/XIndexesSupplier.hpp>
#include <cppuhelper/typeprovider.hxx>
#include <comphelper/types.hxx>
#include <com/sun/star/sdbcx/KeyType.hpp>
#include <connectivity/dbtools.hxx>
#include <connectivity/dbexception.hxx>
#include <list>
#include <algorithm>
#include <string.h>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/sdbcx/XTablesSupplier.hpp>
#include "querycomposer.hxx"
#include "composertools.hxx"
#include <tools/debug.hxx>
#include <string.h>
#include <rtl/logfile.hxx>

using namespace dbaccess;
using namespace ::connectivity;
using namespace ::dbtools;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::sdbc;
using namespace ::com::sun::star::sdb;
using namespace ::com::sun::star::sdbcx;
using namespace ::com::sun::star::container;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::util;
using namespace ::com::sun::star::io;
using namespace ::com::sun::star;
using namespace ::cppu;
using namespace ::osl;

DECLARE_STL_USTRINGACCESS_MAP(::rtl::OUStringBuffer,TSQLStatements);
namespace
{
    void lcl_fillKeyCondition(const ::rtl::OUString& i_sTableName,const ::rtl::OUString& i_sQuotedColumnName,const ORowSetValue& i_aValue,TSQLStatements& io_aKeyConditions)
    {
        ::rtl::OUStringBuffer& rKeyCondition = io_aKeyConditions[i_sTableName];
        if ( rKeyCondition.getLength() )
            rKeyCondition.appendAscii(" AND ");
        rKeyCondition.append(i_sQuotedColumnName);
        if ( i_aValue.isNull() )
            rKeyCondition.appendAscii(" IS NULL");
        else
            rKeyCondition.appendAscii(" = ?");
    }
}

DBG_NAME(OptimisticSet)
// -------------------------------------------------------------------------
OptimisticSet::OptimisticSet(const ::comphelper::ComponentContext& _rContext,
                             const Reference< XConnection>& i_xConnection,
                             const Reference< XSingleSelectQueryAnalyzer >& _xComposer,
                             const ORowSetValueVector& _aParameterValueForCache)
            :OKeySet(NULL,NULL,::rtl::OUString(),_xComposer,_aParameterValueForCache)
            ,m_aSqlParser( _rContext.getLegacyServiceFactory() )
            ,m_aSqlIterator( i_xConnection, Reference<XTablesSupplier>(_xComposer,UNO_QUERY)->getTables(), m_aSqlParser, NULL )
            ,m_bResultSetChanged(false)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbaccess", "Ocke.Janssen@sun.com", "OptimisticSet::OptimisticSet" );
    DBG_CTOR(OptimisticSet,NULL);
}
// -----------------------------------------------------------------------------
OptimisticSet::~OptimisticSet()
{
    DBG_DTOR(OptimisticSet,NULL);
}
// -----------------------------------------------------------------------------
void OptimisticSet::construct(const Reference< XResultSet>& _xDriverSet,const ::rtl::OUString& i_sRowSetFilter)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbaccess", "Ocke.Janssen@sun.com", "OptimisticSet::construct" );
    OCacheSet::construct(_xDriverSet,i_sRowSetFilter);
    initColumns();

    Reference<XDatabaseMetaData> xMeta = m_xConnection->getMetaData();
    bool bCase = (xMeta.is() && xMeta->storesMixedCaseQuotedIdentifiers()) ? true : false;
    Reference<XColumnsSupplier> xQueryColSup(m_xComposer,UNO_QUERY);
    const Reference<XNameAccess> xQueryColumns = xQueryColSup->getColumns();
    const Reference<XTablesSupplier> xTabSup(m_xComposer,UNO_QUERY);
    const Reference<XNameAccess> xTables = xTabSup->getTables();
    const Sequence< ::rtl::OUString> aTableNames = xTables->getElementNames();
    const ::rtl::OUString* pTableNameIter = aTableNames.getConstArray();
    const ::rtl::OUString* pTableNameEnd = pTableNameIter + aTableNames.getLength();
    for( ; pTableNameIter != pTableNameEnd ; ++pTableNameIter)
    {
        ::std::auto_ptr<SelectColumnsMetaData> pKeyColumNames(new SelectColumnsMetaData(bCase));
        findTableColumnsMatching_throw(xTables->getByName(*pTableNameIter),*pTableNameIter,xMeta,xQueryColumns,pKeyColumNames);
        m_pKeyColumnNames->insert(pKeyColumNames->begin(),pKeyColumNames->end());
    }

    // the first row is empty because it's now easier for us to distinguish	when we are beforefirst or first
    // without extra variable to be set
    m_aKeyMap.insert(OKeySetMatrix::value_type(0,OKeySetValue(NULL,::std::pair<sal_Int32,Reference<XRow> >(0,NULL))));
    m_aKeyIter = m_aKeyMap.begin();

    ::rtl::OUStringBuffer aFilter = createKeyFilter();

    Reference< XSingleSelectQueryComposer> xSourceComposer(m_xComposer,UNO_QUERY);
    Reference< XMultiServiceFactory >  xFactory(m_xConnection, UNO_QUERY_THROW);
    Reference<XSingleSelectQueryComposer> xAnalyzer(xFactory->createInstance(SERVICE_NAME_SINGLESELECTQUERYCOMPOSER),UNO_QUERY);
    ::rtl::OUString sQuery = xSourceComposer->getQuery();
    xAnalyzer->setElementaryQuery(xSourceComposer->getElementaryQuery());
    // check for joins
    ::rtl::OUString aErrorMsg;
    ::std::auto_ptr<OSQLParseNode> pStatementNode( m_aSqlParser.parseTree( aErrorMsg, sQuery ) );
    m_aSqlIterator.setParseTree( pStatementNode.get() );
    m_aSqlIterator.traverseAll();
    fillJoinedColumns_throw(m_aSqlIterator.getJoinConditions());

    const ::rtl::OUString sComposerFilter = m_xComposer->getFilter();
    if ( i_sRowSetFilter.getLength() || (sComposerFilter.getLength() && sComposerFilter != i_sRowSetFilter) )
    {
        FilterCreator aFilterCreator;
        if ( sComposerFilter.getLength() && sComposerFilter != i_sRowSetFilter )
            aFilterCreator.append( sComposerFilter );
        aFilterCreator.append( i_sRowSetFilter );
        aFilterCreator.append( aFilter.makeStringAndClear() );
        aFilter = aFilterCreator.getComposedAndClear();
    }
    xAnalyzer->setFilter(aFilter.makeStringAndClear());
    m_xStatement = m_xConnection->prepareStatement(xAnalyzer->getQueryWithSubstitution());
    ::comphelper::disposeComponent(xAnalyzer);
}
// -------------------------------------------------------------------------
// ::com::sun::star::sdbcx::XDeleteRows
Sequence< sal_Int32 > SAL_CALL OptimisticSet::deleteRows( const Sequence< Any >& /*rows*/ ,const connectivity::OSQLTable& /*_xTable*/) throw(SQLException, RuntimeException)
{
    Sequence< sal_Int32 > aRet;
    return aRet;
}
// -------------------------------------------------------------------------
void SAL_CALL OptimisticSet::updateRow(const ORowSetRow& _rInsertRow ,const ORowSetRow& _rOrginalRow,const connectivity::OSQLTable& /*_xTable*/  ) throw(SQLException, RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbaccess", "Ocke.Janssen@sun.com", "OptimisticSet::updateRow" );
    if ( m_aJoinedKeyColumns.empty() )
        throw SQLException();
    // list all cloumns that should be set
    static ::rtl::OUString s_sPara	= ::rtl::OUString::createFromAscii(" = ?");
    ::rtl::OUString aQuote	= getIdentifierQuoteString();
    static ::rtl::OUString aAnd		= ::rtl::OUString::createFromAscii(" AND ");
    ::rtl::OUString sIsNull(RTL_CONSTASCII_USTRINGPARAM(" IS NULL"));
    ::rtl::OUString sParam(RTL_CONSTASCII_USTRINGPARAM(" = ?"));

    ::rtl::OUString aColumnName;
    ::rtl::OUStringBuffer sKeyCondition;
    ::std::map< ::rtl::OUString,bool > aResultSetChanged;
    TSQLStatements aKeyConditions;
    TSQLStatements aIndexConditions;
    TSQLStatements aSql;

    // sal_Int32 i = 1;
    // here we build the condition part for the update statement
    SelectColumnsMetaData::const_iterator aIter = m_pColumnNames->begin();
    SelectColumnsMetaData::const_iterator aEnd = m_pColumnNames->end();
    for(;aIter != aEnd;++aIter)
    {
        if ( aResultSetChanged.find( aIter->second.sTableName ) == aResultSetChanged.end() )
            aResultSetChanged[aIter->second.sTableName] = false;
        const ::rtl::OUString sQuotedColumnName = ::dbtools::quoteName( aQuote,aIter->second.sRealName);
        if ( m_pKeyColumnNames->find(aIter->first) != m_pKeyColumnNames->end() )
        {
            aResultSetChanged[aIter->second.sTableName] = m_aJoinedKeyColumns.find(aIter->second.nPosition) != m_aJoinedKeyColumns.end();
            lcl_fillKeyCondition(aIter->second.sTableName,sQuotedColumnName,(_rOrginalRow->get())[aIter->second.nPosition],aKeyConditions);
        }
        if((_rInsertRow->get())[aIter->second.nPosition].isModified())
        {
            if ( m_aJoinedKeyColumns.find(aIter->second.nPosition) != m_aJoinedKeyColumns.end() )
                throw SQLException();

            ::std::map<sal_Int32,sal_Int32>::const_iterator aJoinIter = m_aJoinedColumns.find(aIter->second.nPosition);
            if ( aJoinIter != m_aJoinedColumns.end() )
            {
                (_rInsertRow->get())[aJoinIter->second] = (_rInsertRow->get())[aIter->second.nPosition];
            }
            ::rtl::OUStringBuffer& rPart = aSql[aIter->second.sTableName];
            if ( rPart.getLength() )
                rPart.appendAscii(", ");
            rPart.append(sQuotedColumnName);
            rPart.append(s_sPara);
        }
    }

    if( aSql.empty() )
        ::dbtools::throwSQLException( DBACORE_RESSTRING( RID_STR_NO_VALUE_CHANGED ), SQL_GENERAL_ERROR, m_xConnection );

    if( aKeyConditions.empty() )
        ::dbtools::throwSQLException( DBACORE_RESSTRING( RID_STR_NO_CONDITION_FOR_PK ), SQL_GENERAL_ERROR, m_xConnection );

    static const ::rtl::OUString s_sUPDATE(RTL_CONSTASCII_USTRINGPARAM("UPDATE "));
    static const ::rtl::OUString s_sSET(RTL_CONSTASCII_USTRINGPARAM(" SET "));

    Reference<XDatabaseMetaData> xMetaData = m_xConnection->getMetaData();

    TSQLStatements::iterator aSqlIter = aSql.begin();
    TSQLStatements::iterator aSqlEnd  = aSql.end();
    for(;aSqlIter != aSqlEnd ; ++aSqlIter)
    {
        if ( aSqlIter->second.getLength() )
        {
            m_bResultSetChanged = m_bResultSetChanged || aResultSetChanged[aSqlIter->first];
            ::rtl::OUStringBuffer sSql(s_sUPDATE);
            ::rtl::OUString sCatalog,sSchema,sTable;
            ::dbtools::qualifiedNameComponents(xMetaData,aSqlIter->first,sCatalog,sSchema,sTable,::dbtools::eInDataManipulation);
            sSql.append( ::dbtools::composeTableNameForSelect( m_xConnection, sCatalog, sSchema, sTable ) );
            sSql.append(s_sSET);
            sSql.append(aSqlIter->second);
            ::rtl::OUStringBuffer& rCondition = aKeyConditions[aSqlIter->first];
            bool bAddWhere = true;
            if ( rCondition.getLength() )
            {
                bAddWhere = false;
                sSql.appendAscii(" WHERE ");
                sSql.append( rCondition );
            }
            executeUpdate(_rInsertRow ,_rOrginalRow,sSql.makeStringAndClear(),aSqlIter->first);
        }
    }
}
// -------------------------------------------------------------------------
void SAL_CALL OptimisticSet::insertRow( const ORowSetRow& _rInsertRow,const connectivity::OSQLTable& /*_xTable*/ ) throw(SQLException, RuntimeException)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbaccess", "Ocke.Janssen@sun.com", "OptimisticSet::insertRow" );
    TSQLStatements aSql;
    TSQLStatements aParameter;
    TSQLStatements aKeyConditions;
    ::std::map< ::rtl::OUString,bool > aResultSetChanged;
    ::rtl::OUString aQuote	= getIdentifierQuoteString();
    static ::rtl::OUString aAnd		= ::rtl::OUString::createFromAscii(" AND ");
    ::rtl::OUString sIsNull(RTL_CONSTASCII_USTRINGPARAM(" IS NULL"));
    ::rtl::OUString sParam(RTL_CONSTASCII_USTRINGPARAM(" = ?"));
    
    // here we build the condition part for the update statement
    SelectColumnsMetaData::const_iterator aIter = m_pColumnNames->begin();
    SelectColumnsMetaData::const_iterator aEnd = m_pColumnNames->end();
    for(;aIter != aEnd;++aIter)
    {
        if ( aResultSetChanged.find( aIter->second.sTableName ) == aResultSetChanged.end() )
            aResultSetChanged[aIter->second.sTableName] = false;
        
        const ::rtl::OUString sQuotedColumnName = ::dbtools::quoteName( aQuote,aIter->second.sRealName);
        if ( (_rInsertRow->get())[aIter->second.nPosition].isModified() )
        {
            if ( m_aJoinedKeyColumns.find(aIter->second.nPosition) != m_aJoinedKeyColumns.end() )
            {
                lcl_fillKeyCondition(aIter->second.sTableName,sQuotedColumnName,(_rInsertRow->get())[aIter->second.nPosition],aKeyConditions);
                aResultSetChanged[aIter->second.sTableName] = true;
            }
            ::std::map<sal_Int32,sal_Int32>::const_iterator aJoinIter = m_aJoinedColumns.find(aIter->second.nPosition);
            if ( aJoinIter != m_aJoinedColumns.end() )
            {
                (_rInsertRow->get())[aJoinIter->second] = (_rInsertRow->get())[aIter->second.nPosition];
            }
            ::rtl::OUStringBuffer& rPart = aSql[aIter->second.sTableName];
            if ( rPart.getLength() )
                rPart.appendAscii(", ");
            rPart.append(sQuotedColumnName);
            ::rtl::OUStringBuffer& rParam = aParameter[aIter->second.sTableName];
            if ( rParam.getLength() )
                rParam.appendAscii(", ");
            rParam.appendAscii("?");
        }
    }
    if ( aParameter.empty() )
        ::dbtools::throwSQLException( DBACORE_RESSTRING( RID_STR_NO_VALUE_CHANGED ), SQL_GENERAL_ERROR, m_xConnection );

    Reference<XDatabaseMetaData> xMetaData = m_xConnection->getMetaData();
    static const ::rtl::OUString s_sINSERT(RTL_CONSTASCII_USTRINGPARAM("INSERT INTO "));
    static const ::rtl::OUString s_sVALUES(RTL_CONSTASCII_USTRINGPARAM(") VALUES ( "));
    TSQLStatements::iterator aSqlIter = aSql.begin();
    TSQLStatements::iterator aSqlEnd  = aSql.end();
    for(;aSqlIter != aSqlEnd ; ++aSqlIter)
    {
        if ( aSqlIter->second.getLength() )
        {
            m_bResultSetChanged = m_bResultSetChanged || aResultSetChanged[aSqlIter->first];
            ::rtl::OUStringBuffer sSql(s_sINSERT);
            ::rtl::OUString sCatalog,sSchema,sTable;
            ::dbtools::qualifiedNameComponents(xMetaData,aSqlIter->first,sCatalog,sSchema,sTable,::dbtools::eInDataManipulation);
            ::rtl::OUString sComposedTableName = ::dbtools::composeTableNameForSelect( m_xConnection, sCatalog, sSchema, sTable );
            sSql.append(sComposedTableName);
            sSql.appendAscii(" ( ");
            sSql.append(aSqlIter->second);
            sSql.append(s_sVALUES);
            sSql.append(aParameter[aSqlIter->first]);
            sSql.appendAscii(" )");

            ::rtl::OUStringBuffer& rCondition = aKeyConditions[aSqlIter->first];
            if ( rCondition.getLength() )
            {
                ::rtl::OUStringBuffer sQuery;
                sQuery.appendAscii("SELECT ");
                sQuery.append(aSqlIter->second);
                sQuery.appendAscii(" FROM ");
                sQuery.append(sComposedTableName);
                sQuery.appendAscii(" WHERE ");
                sQuery.append(rCondition);

                try
                {
                    Reference< XPreparedStatement > xPrep(m_xConnection->prepareStatement(sQuery.makeStringAndClear()));
                    Reference< XParameters > xParameter(xPrep,UNO_QUERY);
                    // and then the values of the where condition
                    SelectColumnsMetaData::iterator aKeyCol = m_pKeyColumnNames->begin();
                    SelectColumnsMetaData::iterator aKeysEnd = m_pKeyColumnNames->end();
                    sal_Int32 i = 1;
                    for(;aKeyCol != aKeysEnd;++aKeyCol)
                    {
                        if ( aKeyCol->second.sTableName == aSqlIter->first )
                        {
                            setParameter(i++,xParameter,(_rInsertRow->get())[aKeyCol->second.nPosition],aKeyCol->second.nType,aKeyCol->second.nScale);
                        }
                    }
                    Reference<XResultSet> xRes = xPrep->executeQuery();
                    Reference<XRow> xRow(xRes,UNO_QUERY);
                    if ( xRow.is() && xRes->next() )
                    {
                        m_bResultSetChanged = true;
                        continue;   
                    }
                }
                catch(const SQLException&)
                {
                }
            }
            
            executeInsert(_rInsertRow,sSql.makeStringAndClear(),aSqlIter->first);
        }
    }
}
// -------------------------------------------------------------------------
void SAL_CALL OptimisticSet::deleteRow(const ORowSetRow& _rDeleteRow,const connectivity::OSQLTable& /*_xTable*/   ) throw(SQLException, RuntimeException)
{
    ::rtl::OUString sParam(RTL_CONSTASCII_USTRINGPARAM(" = ?"));
    ::rtl::OUString sIsNull(RTL_CONSTASCII_USTRINGPARAM(" IS NULL"));
    static const ::rtl::OUString s_sAnd(RTL_CONSTASCII_USTRINGPARAM(" AND "));
    ::rtl::OUString aQuote	= getIdentifierQuoteString();
    ::rtl::OUString aColumnName;
    ::rtl::OUStringBuffer sKeyCondition,sIndexCondition;
    ::std::vector<sal_Int32> aIndexColumnPositions;
    TSQLStatements aKeyConditions;
    TSQLStatements aIndexConditions;
    TSQLStatements aSql;

    // sal_Int32 i = 1;
    // here we build the condition part for the update statement
    SelectColumnsMetaData::const_iterator aIter = m_pColumnNames->begin();
    SelectColumnsMetaData::const_iterator aEnd = m_pColumnNames->end();
    for(;aIter != aEnd;++aIter)
    {
        if ( m_aJoinedKeyColumns.find(aIter->second.nPosition) == m_aJoinedKeyColumns.end() && m_pKeyColumnNames->find(aIter->first) != m_pKeyColumnNames->end() )
        {
            // only delete rows which aren't the key in the join
            const ::rtl::OUString sQuotedColumnName = ::dbtools::quoteName( aQuote,aIter->second.sRealName);
            lcl_fillKeyCondition(aIter->second.sTableName,sQuotedColumnName,(_rDeleteRow->get())[aIter->second.nPosition],aKeyConditions);
        }
    }
    Reference<XDatabaseMetaData> xMetaData = m_xConnection->getMetaData();
    TSQLStatements::iterator aSqlIter = aKeyConditions.begin();
    TSQLStatements::iterator aSqlEnd  = aKeyConditions.end();
    for(;aSqlIter != aSqlEnd ; ++aSqlIter)
    {
        ::rtl::OUStringBuffer& rCondition = aSqlIter->second;
        if ( rCondition.getLength() )
        {
            ::rtl::OUStringBuffer sSql;
            sSql.appendAscii("DELETE FROM ");
            ::rtl::OUString sCatalog,sSchema,sTable;
            ::dbtools::qualifiedNameComponents(xMetaData,aSqlIter->first,sCatalog,sSchema,sTable,::dbtools::eInDataManipulation);
            sSql.append( ::dbtools::composeTableNameForSelect( m_xConnection, sCatalog, sSchema, sTable ) );
            sSql.appendAscii(" WHERE ");
            sSql.append( rCondition );
            executeDelete(_rDeleteRow,sSql.makeStringAndClear(),aSqlIter->first);
        }
    }
}
// -------------------------------------------------------------------------
void OptimisticSet::executeDelete(const ORowSetRow& _rDeleteRow,const ::rtl::OUString& i_sSQL,const ::rtl::OUString& i_sTableName)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbaccess", "Ocke.Janssen@sun.com", "OptimisticSet::executeDelete" );

    // now create end execute the prepared statement
    Reference< XPreparedStatement > xPrep(m_xConnection->prepareStatement(i_sSQL));
    Reference< XParameters > xParameter(xPrep,UNO_QUERY);

    SelectColumnsMetaData::const_iterator aIter = m_pKeyColumnNames->begin();
    SelectColumnsMetaData::const_iterator aEnd = m_pKeyColumnNames->end();
    sal_Int32 i = 1;
    for(;aIter != aEnd;++aIter)
    {
        if ( aIter->second.sTableName == i_sTableName )
            setParameter(i++,xParameter,(_rDeleteRow->get())[aIter->second.nPosition],aIter->second.nType,aIter->second.nScale);
    }
    m_bDeleted = xPrep->executeUpdate() > 0;

    if(m_bDeleted)
    {
        sal_Int32 nBookmark = ::comphelper::getINT32((_rDeleteRow->get())[0].getAny());
        if(m_aKeyIter == m_aKeyMap.find(nBookmark) && m_aKeyIter != m_aKeyMap.end())
            ++m_aKeyIter;
        m_aKeyMap.erase(nBookmark);
        m_bDeleted = sal_True;
    }
}
// -----------------------------------------------------------------------------
::rtl::OUString OptimisticSet::getComposedTableName(const ::rtl::OUString& /*_sCatalog*/,
                                              const ::rtl::OUString& /*_sSchema*/,
                                              const ::rtl::OUString& /*_sTable*/)
{
    RTL_LOGFILE_CONTEXT_AUTHOR( aLogger, "dbaccess", "Ocke.Janssen@sun.com", "OptimisticSet::getComposedTableName" );
    ::rtl::OUString aComposedName;
/*
    Reference<XDatabaseMetaData> xMetaData = m_xConnection->getMetaData();

    if( xMetaData.is() && xMetaData->supportsTableCorrelationNames() )
    {
        aComposedName = ::dbtools::composeTableName( xMetaData, _sCatalog, _sSchema, _sTable, sal_False, ::dbtools::eInDataManipulation );
        // first we have to check if the composed tablename is in the select clause or if an alias is used
        Reference<XTablesSupplier> xTabSup(m_xComposer,UNO_QUERY);
        Reference<XNameAccess> xSelectTables = xTabSup->getTables();
        OSL_ENSURE(xSelectTables.is(),"No Select tables!");
        if(xSelectTables.is())
        {
            if(!xSelectTables->hasByName(aComposedName))
            { // the composed name isn't used in the select clause so we have to find out which name is used instead
                ::rtl::OUString sCatalog,sSchema,sTable;
                ::dbtools::qualifiedNameComponents(xMetaData,m_sUpdateTableName,sCatalog,sSchema,sTable,::dbtools::eInDataManipulation);
                aComposedName = ::dbtools::composeTableNameForSelect( m_xConnection, sCatalog, sSchema, sTable );
            }
            else
                aComposedName = ::dbtools::composeTableNameForSelect( m_xConnection, _sCatalog, _sSchema, _sTable );
        }
    }
    else
        aComposedName = ::dbtools::composeTableNameForSelect( m_xConnection, _sCatalog, _sSchema, _sTable );
*/
    return aComposedName;
}
// -----------------------------------------------------------------------------
void OptimisticSet::fillJoinedColumns_throw(const ::std::vector< TNodePair >& i_aJoinColumns)
{
    ::std::vector< TNodePair >::const_iterator aIter = i_aJoinColumns.begin();
    for(;aIter != i_aJoinColumns.end();++aIter)
    {
        ::rtl::OUString sColumnName,sTableName;
        m_aSqlIterator.getColumnRange(aIter->first,sColumnName,sTableName);
        ::rtl::OUStringBuffer sLeft,sRight;
        sLeft.append(sTableName);
        sLeft.appendAscii(".");
        sLeft.append(sColumnName);
        m_aSqlIterator.getColumnRange(aIter->second,sColumnName,sTableName);
        sRight.append(sTableName);
        sRight.appendAscii(".");
        sRight.append(sColumnName);
        fillJoinedColumns_throw(sLeft.makeStringAndClear(),sRight.makeStringAndClear());
    }
}
// -----------------------------------------------------------------------------
void OptimisticSet::fillJoinedColumns_throw(const ::rtl::OUString& i_sLeftColumn,const ::rtl::OUString& i_sRightColumn)
{    
    sal_Int32 nLeft = 0,nRight = 0;
    SelectColumnsMetaData::const_iterator aLeftIter  = m_pKeyColumnNames->find(i_sLeftColumn);
    SelectColumnsMetaData::const_iterator aRightIter = m_pKeyColumnNames->find(i_sRightColumn);

    bool bLeftKey = aLeftIter != m_pKeyColumnNames->end();
    if ( bLeftKey )
    {
        nLeft = aLeftIter->second.nPosition;
    }
    else
    {
        aLeftIter = m_pColumnNames->find(i_sLeftColumn);
        if ( aLeftIter != m_pColumnNames->end() )
            nLeft = aLeftIter->second.nPosition;
    }

    bool bRightKey = aRightIter != m_pKeyColumnNames->end();
    if ( bRightKey )
    {
        nRight = aRightIter->second.nPosition;
    }
    else
    {
        aRightIter = m_pColumnNames->find(i_sRightColumn);
        if ( aRightIter != m_pColumnNames->end() )
            nRight = aRightIter->second.nPosition;
    }

    if (bLeftKey)
        m_aJoinedKeyColumns[nLeft] = nRight;
    else
        m_aJoinedColumns[nLeft] = nRight;
    if (bRightKey)
        m_aJoinedKeyColumns[nRight] = nLeft;
    else
        m_aJoinedColumns[nRight] = nLeft;
}
// -----------------------------------------------------------------------------
bool OptimisticSet::isResultSetChanged() const
{
    bool bOld = m_bResultSetChanged;
    m_bResultSetChanged = false;
    return bOld;
}
// -----------------------------------------------------------------------------
void OptimisticSet::reset(const Reference< XResultSet>& _xDriverSet)
{
    OCacheSet::construct(_xDriverSet,::rtl::OUString());
    m_bRowCountFinal = sal_False;
    m_aKeyMap.clear();
    m_aKeyMap.insert(OKeySetMatrix::value_type(0,OKeySetValue(NULL,::std::pair<sal_Int32,Reference<XRow> >(0,NULL))));
    m_aKeyIter = m_aKeyMap.begin();
}
// -----------------------------------------------------------------------------
void OptimisticSet::mergeColumnValues(sal_Int32 i_nColumnIndex,ORowSetValueVector::Vector& io_aInsertRow,ORowSetValueVector::Vector& io_aRow,::std::vector<sal_Int32>& o_aChangedColumns)
{
    o_aChangedColumns.push_back(i_nColumnIndex);
    ::std::map<sal_Int32,sal_Int32>::const_iterator aJoinIter = m_aJoinedColumns.find(i_nColumnIndex);
    if ( aJoinIter != m_aJoinedColumns.end() )
    {
        io_aRow[aJoinIter->second] = io_aRow[i_nColumnIndex];
        io_aInsertRow[aJoinIter->second] = io_aInsertRow[i_nColumnIndex];
        io_aRow[aJoinIter->second].setModified();
        o_aChangedColumns.push_back(aJoinIter->second);
    }
}
namespace
{
    struct PositionFunctor : ::std::unary_function<SelectColumnsMetaData::value_type,bool>
    {
        sal_Int32 m_nPos;
        PositionFunctor(sal_Int32 i_nPos)
            : m_nPos(i_nPos)
        {
        }

        inline bool operator()(const SelectColumnsMetaData::value_type& _aType)
        {
            return m_nPos == _aType.second.nPosition;
        }
    };
    struct TableNameFunctor : ::std::unary_function<SelectColumnsMetaData::value_type,bool>
    {
        ::rtl::OUString m_sTableName;
        TableNameFunctor(const ::rtl::OUString& i_sTableName)
            : m_sTableName(i_sTableName)
        {
        }

        inline bool operator()(const SelectColumnsMetaData::value_type& _aType)
        {
            return m_sTableName == _aType.second.sTableName;
        }
    };
}
// -----------------------------------------------------------------------------
bool OptimisticSet::updateColumnValues(const ORowSetValueVector::Vector& io_aCachedRow,ORowSetValueVector::Vector& io_aRow,const ::std::vector<sal_Int32>& i_aChangedColumns)
{
    bool bRet = false;
    ::std::vector<sal_Int32>::const_iterator aColIdxIter = i_aChangedColumns.begin();
    for(;aColIdxIter != i_aChangedColumns.end();++aColIdxIter)
    {
        SelectColumnsMetaData::const_iterator aFind = ::std::find_if(m_pKeyColumnNames->begin(),m_pKeyColumnNames->end(),PositionFunctor(*aColIdxIter));
        if ( aFind != m_pKeyColumnNames->end() )
        {
            const ::rtl::OUString sTableName = aFind->second.sTableName;
            aFind = ::std::find_if(m_pKeyColumnNames->begin(),m_pKeyColumnNames->end(),TableNameFunctor(sTableName));
            while( aFind != m_pKeyColumnNames->end() )
            {
                io_aRow[aFind->second.nPosition].setSigned(io_aCachedRow[aFind->second.nPosition].isSigned());
                if ( io_aCachedRow[aFind->second.nPosition] != io_aRow[aFind->second.nPosition] )
                    break;
                ++aFind;
            }
            if ( aFind == m_pKeyColumnNames->end() )
            {
                bRet = true;
                SelectColumnsMetaData::const_iterator aIter = m_pColumnNames->begin();
                SelectColumnsMetaData::const_iterator aEnd = m_pColumnNames->end();
                for ( ;aIter != aEnd;++aIter )
                {
                    if ( aIter->second.sTableName == sTableName )
                    {
                        io_aRow[aIter->second.nPosition] = io_aCachedRow[aIter->second.nPosition];
                        io_aRow[aIter->second.nPosition].setModified();
                    }
                }
            }
        }
    }
    return bRet;
}
// -----------------------------------------------------------------------------
bool OptimisticSet::columnValuesUpdated(ORowSetValueVector::Vector& o_aCachedRow,const ORowSetValueVector::Vector& i_aRow)
{
    bool bRet = false;
    SelectColumnsMetaData::const_iterator aIter = m_pColumnNames->begin();
    SelectColumnsMetaData::const_iterator aEnd = m_pColumnNames->end();
    for(;aIter != aEnd;++aIter)
    {
        SelectColumnsMetaData::const_iterator aFind = ::std::find_if(m_pKeyColumnNames->begin(),m_pKeyColumnNames->end(),PositionFunctor(aIter->second.nPosition));
        if ( aFind != m_pKeyColumnNames->end() )
        {
            const ::rtl::OUString sTableName = aFind->second.sTableName;
            aFind = ::std::find_if(m_pKeyColumnNames->begin(),m_pKeyColumnNames->end(),TableNameFunctor(sTableName));
            while( aFind != m_pKeyColumnNames->end() )
            {
                o_aCachedRow[aFind->second.nPosition].setSigned(i_aRow[aFind->second.nPosition].isSigned());
                if ( o_aCachedRow[aFind->second.nPosition] != i_aRow[aFind->second.nPosition] )
                    break;
                ++aFind;
            }
            if ( aFind == m_pKeyColumnNames->end() )
            {
                bRet = true;
                SelectColumnsMetaData::const_iterator aIter2 = m_pColumnNames->begin();
                SelectColumnsMetaData::const_iterator aEnd2 = m_pColumnNames->end();
                for ( ;aIter2 != aEnd2;++aIter2 )
                {
                    if ( aIter2->second.sTableName == sTableName )
                    {
                        o_aCachedRow[aIter2->second.nPosition] = i_aRow[aIter2->second.nPosition];
                        o_aCachedRow[aIter2->second.nPosition].setModified();
                    }
                }
                fillMissingValues(o_aCachedRow);
            }
        }
    }
    return bRet;
}
// -----------------------------------------------------------------------------
void OptimisticSet::fillMissingValues(ORowSetValueVector::Vector& io_aRow) const
{
    TSQLStatements aSql;
    TSQLStatements aKeyConditions;
    ::std::map< ::rtl::OUString,bool > aResultSetChanged;
    ::rtl::OUString aQuote	= getIdentifierQuoteString();
    static ::rtl::OUString aAnd		= ::rtl::OUString::createFromAscii(" AND ");
    ::rtl::OUString sIsNull(RTL_CONSTASCII_USTRINGPARAM(" IS NULL"));
    ::rtl::OUString sParam(RTL_CONSTASCII_USTRINGPARAM(" = ?"));
    // here we build the condition part for the update statement
    SelectColumnsMetaData::const_iterator aColIter = m_pColumnNames->begin();
    SelectColumnsMetaData::const_iterator aColEnd = m_pColumnNames->end();
    for(;aColIter != aColEnd;++aColIter)
    {
        const ::rtl::OUString sQuotedColumnName = ::dbtools::quoteName( aQuote,aColIter->second.sRealName);
        if ( m_aJoinedKeyColumns.find(aColIter->second.nPosition) != m_aJoinedKeyColumns.end() )
        {
            lcl_fillKeyCondition(aColIter->second.sTableName,sQuotedColumnName,io_aRow[aColIter->second.nPosition],aKeyConditions);
        }
        ::rtl::OUStringBuffer& rPart = aSql[aColIter->second.sTableName];
        if ( rPart.getLength() )
            rPart.appendAscii(", ");
        rPart.append(sQuotedColumnName);
    }
    Reference<XDatabaseMetaData> xMetaData = m_xConnection->getMetaData();
    TSQLStatements::iterator aSqlIter = aSql.begin();
    TSQLStatements::iterator aSqlEnd  = aSql.end();
    for(;aSqlIter != aSqlEnd ; ++aSqlIter)
    {
        if ( aSqlIter->second.getLength() )
        {
            ::rtl::OUStringBuffer& rCondition = aKeyConditions[aSqlIter->first];
            if ( rCondition.getLength() )
            {
                ::rtl::OUString sCatalog,sSchema,sTable;
                ::dbtools::qualifiedNameComponents(xMetaData,aSqlIter->first,sCatalog,sSchema,sTable,::dbtools::eInDataManipulation);
                ::rtl::OUString sComposedTableName = ::dbtools::composeTableNameForSelect( m_xConnection, sCatalog, sSchema, sTable );
                ::rtl::OUStringBuffer sQuery;
                sQuery.appendAscii("SELECT ");
                sQuery.append(aSqlIter->second);
                sQuery.appendAscii(" FROM ");
                sQuery.append(sComposedTableName);
                sQuery.appendAscii(" WHERE ");
                sQuery.append(rCondition.makeStringAndClear());

                try
                {
                    Reference< XPreparedStatement > xPrep(m_xConnection->prepareStatement(sQuery.makeStringAndClear()));
                    Reference< XParameters > xParameter(xPrep,UNO_QUERY);
                    // and then the values of the where condition
                    SelectColumnsMetaData::iterator aKeyIter = m_pKeyColumnNames->begin();
                    SelectColumnsMetaData::iterator aKeyEnd = m_pKeyColumnNames->end();
                    sal_Int32 i = 1;
                    for(;aKeyIter != aKeyEnd;++aKeyIter)
                    {
                        if ( aKeyIter->second.sTableName == aSqlIter->first )
                        {
                            setParameter(i++,xParameter,io_aRow[aKeyIter->second.nPosition],aKeyIter->second.nType,aKeyIter->second.nScale);
                        }
                    }
                    Reference<XResultSet> xRes = xPrep->executeQuery();
                    Reference<XRow> xRow(xRes,UNO_QUERY);
                    if ( xRow.is() && xRes->next() )
                    {
                        i = 1;
                        aColIter = m_pColumnNames->begin();
                        for(;aColIter != aColEnd;++aColIter)
                        {
                            if ( aColIter->second.sTableName == aSqlIter->first )
                            {
                                io_aRow[aColIter->second.nPosition].fill(i++,aColIter->second.nType,aColIter->second.bNullable,xRow);
                                io_aRow[aColIter->second.nPosition].setModified();
                            }
                        }
                    }
                }
                catch(const SQLException&)
                {
                }
            }
        }
    }
}
// -----------------------------------------------------------------------------