/* -*- 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 <sal/config.h>

#include <o3tl/safeint.hxx>
#include <osl/diagnose.h>
#include <file/FStatement.hxx>
#include <file/FConnection.hxx>
#include <sqlbison.hxx>
#include <file/FDriver.hxx>
#include <file/FResultSet.hxx>
#include <sal/log.hxx>
#include <com/sun/star/sdbc/ResultSetConcurrency.hpp>
#include <com/sun/star/sdbc/ResultSetType.hpp>
#include <com/sun/star/sdbc/FetchDirection.hpp>
#include <com/sun/star/lang/DisposedException.hpp>
#include <comphelper/sequence.hxx>
#include <comphelper/servicehelper.hxx>
#include <cppuhelper/typeprovider.hxx>
#include <comphelper/types.hxx>
#include <connectivity/dbexception.hxx>
#include <strings.hrc>
#include <algorithm>
#include <cstddef>

namespace connectivity::file
{


using namespace dbtools;
using namespace com::sun::star::uno;
using namespace com::sun::star::lang;
using namespace com::sun::star::beans;
using namespace com::sun::star::sdbc;
using namespace com::sun::star::sdbcx;
using namespace com::sun::star::container;

OStatement_Base::OStatement_Base(OConnection* _pConnection )
    :OStatement_BASE(m_aMutex)
    ,::comphelper::OPropertyContainer(OStatement_BASE::rBHelper)
    ,m_xDBMetaData(_pConnection->getMetaData())
    ,m_aParser( _pConnection->getDriver()->getComponentContext() )
    ,m_aSQLIterator( _pConnection, _pConnection->createCatalog()->getTables(), m_aParser )
    ,m_pConnection(_pConnection)
    ,m_pParseTree(nullptr)
    ,m_nMaxFieldSize(0)
    ,m_nMaxRows(0)
    ,m_nQueryTimeOut(0)
    ,m_nFetchSize(0)
    ,m_nResultSetType(ResultSetType::FORWARD_ONLY)
    ,m_nFetchDirection(FetchDirection::FORWARD)
    ,m_nResultSetConcurrency(ResultSetConcurrency::UPDATABLE)
    ,m_bEscapeProcessing(true)
{
    sal_Int32 nAttrib = 0;

    registerProperty(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_CURSORNAME),      PROPERTY_ID_CURSORNAME,         nAttrib,&m_aCursorName,     ::cppu::UnoType<OUString>::get());
    registerProperty(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_MAXFIELDSIZE),    PROPERTY_ID_MAXFIELDSIZE,       nAttrib,&m_nMaxFieldSize,       ::cppu::UnoType<sal_Int32>::get());
    registerProperty(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_MAXROWS),         PROPERTY_ID_MAXROWS,            nAttrib,&m_nMaxRows,        ::cppu::UnoType<sal_Int32>::get());
    registerProperty(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_QUERYTIMEOUT),    PROPERTY_ID_QUERYTIMEOUT,       nAttrib,&m_nQueryTimeOut,   ::cppu::UnoType<sal_Int32>::get());
    registerProperty(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_FETCHSIZE),       PROPERTY_ID_FETCHSIZE,          nAttrib,&m_nFetchSize,      ::cppu::UnoType<sal_Int32>::get());
    registerProperty(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_RESULTSETTYPE),   PROPERTY_ID_RESULTSETTYPE,      nAttrib,&m_nResultSetType,  ::cppu::UnoType<sal_Int32>::get());
    registerProperty(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_FETCHDIRECTION),  PROPERTY_ID_FETCHDIRECTION,     nAttrib,&m_nFetchDirection, ::cppu::UnoType<sal_Int32>::get());
    registerProperty(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_ESCAPEPROCESSING),PROPERTY_ID_ESCAPEPROCESSING,   nAttrib,&m_bEscapeProcessing,cppu::UnoType<bool>::get());

    registerProperty(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_RESULTSETCONCURRENCY),        PROPERTY_ID_RESULTSETCONCURRENCY,   nAttrib,&m_nResultSetConcurrency,       ::cppu::UnoType<sal_Int32>::get());
}

OStatement_Base::~OStatement_Base()
{
    osl_atomic_increment( &m_refCount );
    disposing();
}

void OStatement_Base::disposeResultSet()
{
    SAL_INFO( "connectivity.drivers", "file Ocke.Janssen@sun.com OStatement_Base::disposeResultSet" );
    // free the cursor if alive
    Reference< XComponent > xComp(m_xResultSet.get(), UNO_QUERY);
    assert(xComp.is() || !m_xResultSet.get().is());
    if (xComp.is())
        xComp->dispose();
    m_xResultSet.clear();
}

void OStatement_BASE2::disposing()
{
    ::osl::MutexGuard aGuard(m_aMutex);

    disposeResultSet();

    if(m_pSQLAnalyzer)
        m_pSQLAnalyzer->dispose();

    if(m_aRow.is())
    {
        m_aRow->clear();
        m_aRow = nullptr;
    }

    m_aSQLIterator.dispose();

    m_pTable.clear();

    m_pConnection.clear();

    if ( m_pParseTree )
    {
        delete m_pParseTree;
        m_pParseTree = nullptr;
    }

    OStatement_Base::disposing();
}

void SAL_CALL OStatement_Base::acquire() noexcept
{
    OStatement_BASE::acquire();
}

void SAL_CALL OStatement_BASE2::release() noexcept
{
    OStatement_BASE::release();
}

Any SAL_CALL OStatement_Base::queryInterface( const Type & rType )
{
    const Any aRet = OStatement_BASE::queryInterface(rType);
    return aRet.hasValue() ? aRet : OPropertySetHelper::queryInterface(rType);
}

Sequence< Type > SAL_CALL OStatement_Base::getTypes(  )
{
    ::cppu::OTypeCollection aTypes( cppu::UnoType<css::beans::XMultiPropertySet>::get(),
                                    cppu::UnoType<css::beans::XFastPropertySet>::get(),
                                    cppu::UnoType<css::beans::XPropertySet>::get());

    return ::comphelper::concatSequences(aTypes.getTypes(),OStatement_BASE::getTypes());
}


void SAL_CALL OStatement_Base::cancel(  )
{
}

void SAL_CALL OStatement_Base::close()
{
    {
        ::osl::MutexGuard aGuard( m_aMutex );
        checkDisposed(OStatement_BASE::rBHelper.bDisposed);
    }
    dispose();
}

void OStatement_Base::closeResultSet()
{
    SAL_INFO( "connectivity.drivers", "file Ocke.Janssen@sun.com OStatement_Base::clearMyResultSet " );
    ::osl::MutexGuard aGuard( m_aMutex );
    checkDisposed(OStatement_BASE::rBHelper.bDisposed);

    Reference< XCloseable > xCloseable(m_xResultSet.get(), UNO_QUERY);
    assert(xCloseable.is() || !m_xResultSet.get().is());
    if (xCloseable.is())
    {
        try
        {
            xCloseable->close();
        }
        catch( const DisposedException& ) { }
    }

    m_xResultSet.clear();
}

Any SAL_CALL OStatement_Base::getWarnings(  )
{
    ::osl::MutexGuard aGuard( m_aMutex );
    checkDisposed(OStatement_BASE::rBHelper.bDisposed);

    return Any(m_aLastWarning);
}

void SAL_CALL OStatement_Base::clearWarnings(  )
{
    ::osl::MutexGuard aGuard( m_aMutex );
    checkDisposed(OStatement_BASE::rBHelper.bDisposed);

    m_aLastWarning = SQLWarning();
}

::cppu::IPropertyArrayHelper* OStatement_Base::createArrayHelper( ) const
{
    Sequence< Property > aProps;
    describeProperties(aProps);
    return new ::cppu::OPropertyArrayHelper(aProps);
}


::cppu::IPropertyArrayHelper & OStatement_Base::getInfoHelper()
{
    return *getArrayHelper();
}

rtl::Reference<OResultSet> OStatement::createResultSet()
{
    return new OResultSet(this,m_aSQLIterator);
}

IMPLEMENT_SERVICE_INFO(OStatement,"com.sun.star.sdbc.driver.file.Statement","com.sun.star.sdbc.Statement");

void SAL_CALL OStatement::acquire() noexcept
{
    OStatement_BASE2::acquire();
}

void SAL_CALL OStatement::release() noexcept
{
    OStatement_BASE2::release();
}


sal_Bool SAL_CALL OStatement::execute( const OUString& sql )
{
    ::osl::MutexGuard aGuard( m_aMutex );

    executeQuery(sql);

    return m_aSQLIterator.getStatementType() == OSQLStatementType::Select;
}


Reference< XResultSet > SAL_CALL OStatement::executeQuery( const OUString& sql )
{
    ::osl::MutexGuard aGuard( m_aMutex );
    checkDisposed(OStatement_BASE::rBHelper.bDisposed);

    construct(sql);
    Reference< XResultSet > xRS;
    rtl::Reference<OResultSet> pResult = createResultSet();
    xRS = pResult;
    initializeResultSet(pResult.get());
    m_xResultSet = xRS;

    pResult->OpenImpl();

    return xRS;
}

Reference< XConnection > SAL_CALL OStatement::getConnection(  )
{
    return m_pConnection;
}

sal_Int32 SAL_CALL OStatement::executeUpdate( const OUString& sql )
{
    ::osl::MutexGuard aGuard( m_aMutex );
    checkDisposed(OStatement_BASE::rBHelper.bDisposed);


    construct(sql);
    rtl::Reference<OResultSet> pResult = createResultSet();
    initializeResultSet(pResult.get());
    pResult->OpenImpl();

    return pResult->getRowCountResult();
}


void SAL_CALL OStatement_Base::disposing()
{
    if(m_aEvaluateRow.is())
    {
        m_aEvaluateRow->clear();
        m_aEvaluateRow = nullptr;
    }
    OStatement_BASE::disposing();
}

Reference< css::beans::XPropertySetInfo > SAL_CALL OStatement_Base::getPropertySetInfo(  )
{
    return ::cppu::OPropertySetHelper::createPropertySetInfo(getInfoHelper());
}

Any SAL_CALL OStatement::queryInterface( const Type & rType )
{
    Any aRet = OStatement_XStatement::queryInterface( rType);
    return aRet.hasValue() ? aRet : OStatement_BASE2::queryInterface( rType);
}

void OStatement_Base::analyzeSQL()
{
    OSL_ENSURE(m_pSQLAnalyzer,"OResultSet::analyzeSQL: Analyzer isn't set!");
    // start analysing the statement
    m_pSQLAnalyzer->setOrigColumns(m_xColNames);
    m_pSQLAnalyzer->start(m_pParseTree);

    const OSQLParseNode* pOrderbyClause = m_aSQLIterator.getOrderTree();
    if(!pOrderbyClause)
        return;

    OSQLParseNode * pOrderingSpecCommalist = pOrderbyClause->getChild(2);
    OSL_ENSURE(SQL_ISRULE(pOrderingSpecCommalist,ordering_spec_commalist),"OResultSet: Error in Parse Tree");

    for (size_t m = 0; m < pOrderingSpecCommalist->count(); m++)
    {
        OSQLParseNode * pOrderingSpec = pOrderingSpecCommalist->getChild(m);
        OSL_ENSURE(SQL_ISRULE(pOrderingSpec,ordering_spec),"OResultSet: Error in Parse Tree");
        OSL_ENSURE(pOrderingSpec->count() == 2,"OResultSet: Error in Parse Tree");

        OSQLParseNode * pColumnRef = pOrderingSpec->getChild(0);
        if(!SQL_ISRULE(pColumnRef,column_ref))
        {
            throw SQLException();
        }
        OSQLParseNode * pAscendingDescending = pOrderingSpec->getChild(1);
        setOrderbyColumn(pColumnRef,pAscendingDescending);
    }
}

void OStatement_Base::setOrderbyColumn( OSQLParseNode const * pColumnRef,
                                        OSQLParseNode const * pAscendingDescending)
{
    OUString aColumnName;
    if (pColumnRef->count() == 1)
        aColumnName = pColumnRef->getChild(0)->getTokenValue();
    else if (pColumnRef->count() == 3)
    {
        pColumnRef->getChild(2)->parseNodeToStr( aColumnName, getOwnConnection(), nullptr, false, false );
    }
    else
    {
        throw SQLException();
    }

    Reference<XColumnLocate> xColLocate(m_xColNames,UNO_QUERY);
    if(!xColLocate.is())
        return;
    // Everything tested and we have the name of the Column.
    // What number is the Column?
    ::rtl::Reference<OSQLColumns> aSelectColumns = m_aSQLIterator.getSelectColumns();
    ::comphelper::UStringMixEqual aCase;
    OSQLColumns::const_iterator aFind = ::connectivity::find(aSelectColumns->begin(),aSelectColumns->end(),aColumnName,aCase);
    if ( aFind == aSelectColumns->end() )
        throw SQLException();
    m_aOrderbyColumnNumber.push_back((aFind - aSelectColumns->begin()) + 1);

    // Ascending or Descending?
    m_aOrderbyAscending.push_back(SQL_ISTOKEN(pAscendingDescending,DESC) ? TAscendingOrder::DESC : TAscendingOrder::ASC);
}

void OStatement_Base::construct(const OUString& sql)
{
    OUString aErr;
    m_pParseTree = m_aParser.parseTree(aErr,sql).release();
    if(!m_pParseTree)
        throw SQLException(aErr,*this,OUString(),0,Any());

    m_aSQLIterator.setParseTree(m_pParseTree);
    m_aSQLIterator.traverseAll();
    const OSQLTables& rTabs = m_aSQLIterator.getTables();

    // sanity checks
    if ( rTabs.empty() )
        // no tables -> nothing to operate on -> error
        m_pConnection->throwGenericSQLException(STR_QUERY_NO_TABLE,*this);

    if ( rTabs.size() > 1 || m_aSQLIterator.hasErrors() )
        // more than one table -> can't operate on them -> error
        m_pConnection->throwGenericSQLException(STR_QUERY_MORE_TABLES,*this);

    if ( (m_aSQLIterator.getStatementType() == OSQLStatementType::Select) && m_aSQLIterator.getSelectColumns()->empty() )
        // SELECT statement without columns -> error
        m_pConnection->throwGenericSQLException(STR_QUERY_NO_COLUMN,*this);

    switch(m_aSQLIterator.getStatementType())
    {
        case OSQLStatementType::CreateTable:
        case OSQLStatementType::OdbcCall:
        case OSQLStatementType::Unknown:
            m_pConnection->throwGenericSQLException(STR_QUERY_TOO_COMPLEX,*this);
            break;
        case OSQLStatementType::Select:
            if(SQL_ISRULE(m_aSQLIterator.getParseTree(), union_statement))
            {
                m_pConnection->throwGenericSQLException(STR_QUERY_TOO_COMPLEX, *this);
            }
            assert(SQL_ISRULE(m_aSQLIterator.getParseTree(), select_statement));
            break;
        default:
            break;
    }

    // at this moment we support only one table per select statement
    m_pTable = dynamic_cast<OFileTable*>(rTabs.begin()->second.get());
    OSL_ENSURE(m_pTable.is(),"No table!");
    if ( m_pTable.is() )
        m_xColNames     = m_pTable->getColumns();
    Reference<XIndexAccess> xNames(m_xColNames,UNO_QUERY);
    // set the binding of the resultrow
    m_aRow          = new OValueRefVector(xNames->getCount());
    (*m_aRow)[0]->setBound(true);
    std::for_each(m_aRow->begin()+1,m_aRow->end(),TSetRefBound(false));

    // set the binding of the resultrow
    m_aEvaluateRow  = new OValueRefVector(xNames->getCount());

    (*m_aEvaluateRow)[0]->setBound(true);
    std::for_each(m_aEvaluateRow->begin()+1,m_aEvaluateRow->end(),TSetRefBound(false));

    // set the select row
    m_aSelectRow = new OValueRefVector(m_aSQLIterator.getSelectColumns()->size());
    std::for_each(m_aSelectRow->begin(),m_aSelectRow->end(),TSetRefBound(true));

    // create the column mapping
    createColumnMapping();

    m_pSQLAnalyzer.reset( new OSQLAnalyzer(m_pConnection.get()) );

    analyzeSQL();
}

void OStatement_Base::createColumnMapping()
{
    // initialize the column index map (mapping select columns to table columns)
    ::rtl::Reference<connectivity::OSQLColumns> xColumns = m_aSQLIterator.getSelectColumns();
    m_aColMapping.resize(xColumns->size() + 1);
    for (std::size_t i=0; i<m_aColMapping.size(); ++i)
        m_aColMapping[i] = i;

    Reference<XIndexAccess> xNames(m_xColNames,UNO_QUERY);
    // now check which columns are bound
    OResultSet::setBoundedColumns(m_aRow,m_aSelectRow,xColumns,xNames,true,m_xDBMetaData,m_aColMapping);
}

void OStatement_Base::initializeResultSet(OResultSet* _pResult)
{
    GetAssignValues();

    _pResult->setSqlAnalyzer(m_pSQLAnalyzer.get());
    _pResult->setOrderByColumns(std::vector(m_aOrderbyColumnNumber));
    _pResult->setOrderByAscending(std::vector(m_aOrderbyAscending));
    _pResult->setBindingRow(m_aRow);
    _pResult->setColumnMapping(std::vector(m_aColMapping));
    _pResult->setEvaluationRow(m_aEvaluateRow);
    _pResult->setAssignValues(m_aAssignValues);
    _pResult->setSelectRow(m_aSelectRow);

    m_pSQLAnalyzer->bindSelectRow(m_aRow);
    m_pSQLAnalyzer->bindEvaluationRow(m_aEvaluateRow);    // Set values in the code of the Compiler
}

void OStatement_Base::GetAssignValues()
{
    if (m_pParseTree == nullptr)
    {
        ::dbtools::throwFunctionSequenceException(*this);
        return;
    }

    if (SQL_ISRULE(m_pParseTree,select_statement))
        // no values have to be set for SELECT
        return;
    else if (SQL_ISRULE(m_pParseTree,insert_statement))
    {
        // Create Row for the values to be set (Reference through new)
        if(m_aAssignValues.is())
            m_aAssignValues->clear();
        sal_Int32 nCount = Reference<XIndexAccess>(m_xColNames,UNO_QUERY_THROW)->getCount();
        m_aAssignValues = new OAssignValues(nCount);
        // unbound all
        std::for_each(m_aAssignValues->begin()+1,m_aAssignValues->end(),TSetRefBound(false));

        m_aParameterIndexes.resize(nCount+1,SQL_NO_PARAMETER);

        // List of Column-Names, that exist in the column_commalist (separated by ;):
        std::vector<OUString> aColumnNameList;

        OSL_ENSURE(m_pParseTree->count() >= 4,"OResultSet: Error in Parse Tree");

        OSQLParseNode * pOptColumnCommalist = m_pParseTree->getChild(3);
        OSL_ENSURE(pOptColumnCommalist != nullptr,"OResultSet: Error in Parse Tree");
        OSL_ENSURE(SQL_ISRULE(pOptColumnCommalist,opt_column_commalist),"OResultSet: Error in Parse Tree");
        if (pOptColumnCommalist->count() == 0)
        {
            const Sequence< OUString>& aNames = m_xColNames->getElementNames();
            aColumnNameList.insert(aColumnNameList.end(), aNames.begin(), aNames.end());
        }
        else
        {
            OSL_ENSURE(pOptColumnCommalist->count() == 3,"OResultSet: Error in Parse Tree");

            OSQLParseNode * pColumnCommalist = pOptColumnCommalist->getChild(1);
            OSL_ENSURE(pColumnCommalist != nullptr,"OResultSet: Error in Parse Tree");
            OSL_ENSURE(SQL_ISRULE(pColumnCommalist,column_commalist),"OResultSet: Error in Parse Tree");
            OSL_ENSURE(pColumnCommalist->count() > 0,"OResultSet: Error in Parse Tree");

            // All Columns in the column_commalist ...
            for (size_t i = 0; i < pColumnCommalist->count(); i++)
            {
                OSQLParseNode * pCol = pColumnCommalist->getChild(i);
                OSL_ENSURE(pCol != nullptr,"OResultSet: Error in Parse Tree");
                aColumnNameList.push_back(pCol->getTokenValue());
            }
        }
        if ( aColumnNameList.empty() )
            throwFunctionSequenceException(*this);

        // Values ...
        OSQLParseNode * pValuesOrQuerySpec = m_pParseTree->getChild(4);
        OSL_ENSURE(pValuesOrQuerySpec != nullptr,"OResultSet: pValuesOrQuerySpec must not be NULL!");
        OSL_ENSURE(SQL_ISRULE(pValuesOrQuerySpec,values_or_query_spec),"OResultSet: ! SQL_ISRULE(pValuesOrQuerySpec,values_or_query_spec)");
        OSL_ENSURE(pValuesOrQuerySpec->count() > 0,"OResultSet: pValuesOrQuerySpec->count() <= 0");

        // just "VALUES" is allowed ...
        if (! SQL_ISTOKEN(pValuesOrQuerySpec->getChild(0),VALUES))
            throwFunctionSequenceException(*this);

        OSL_ENSURE(pValuesOrQuerySpec->count() == 4,"OResultSet: pValuesOrQuerySpec->count() != 4");

        // List of values
        OSQLParseNode * pInsertAtomCommalist = pValuesOrQuerySpec->getChild(2);
        OSL_ENSURE(pInsertAtomCommalist != nullptr,"OResultSet: pInsertAtomCommalist must not be NULL!");
        OSL_ENSURE(pInsertAtomCommalist->count() > 0,"OResultSet: pInsertAtomCommalist <= 0");

        sal_Int32 nIndex=0;
        for (size_t i = 0; i < pInsertAtomCommalist->count(); i++)
        {
            OSQLParseNode * pRow_Value_Const = pInsertAtomCommalist->getChild(i); // row_value_constructor
            OSL_ENSURE(pRow_Value_Const != nullptr,"OResultSet: pRow_Value_Const must not be NULL!");
            if(SQL_ISRULE(pRow_Value_Const,parameter))
            {
                ParseAssignValues(aColumnNameList,pRow_Value_Const,nIndex++); // only one Columnname allowed per loop
            }
            else if(pRow_Value_Const->isToken())
                ParseAssignValues(aColumnNameList,pRow_Value_Const,i);
            else
            {
                if(pRow_Value_Const->count() == aColumnNameList.size())
                {
                    for (size_t j = 0; j < pRow_Value_Const->count(); ++j)
                        ParseAssignValues(aColumnNameList,pRow_Value_Const->getChild(j),nIndex++);
                }
                else
                    throwFunctionSequenceException(*this);
            }
        }
    }
    else if (SQL_ISRULE(m_pParseTree,update_statement_searched))
    {
        if(m_aAssignValues.is())
            m_aAssignValues->clear();
        sal_Int32 nCount = Reference<XIndexAccess>(m_xColNames,UNO_QUERY_THROW)->getCount();
        m_aAssignValues = new OAssignValues(nCount);
        // unbound all
        std::for_each(m_aAssignValues->begin()+1,m_aAssignValues->end(),TSetRefBound(false));

        m_aParameterIndexes.resize(nCount+1,SQL_NO_PARAMETER);

        OSL_ENSURE(m_pParseTree->count() >= 4,"OResultSet: Error in Parse Tree");

        OSQLParseNode * pAssignmentCommalist = m_pParseTree->getChild(3);
        OSL_ENSURE(pAssignmentCommalist != nullptr,"OResultSet: pAssignmentCommalist == NULL");
        OSL_ENSURE(SQL_ISRULE(pAssignmentCommalist,assignment_commalist),"OResultSet: Error in Parse Tree");
        OSL_ENSURE(pAssignmentCommalist->count() > 0,"OResultSet: pAssignmentCommalist->count() <= 0");

        // work on all assignments (commalist) ...
        std::vector< OUString> aList(1);
        for (size_t i = 0; i < pAssignmentCommalist->count(); i++)
        {
            OSQLParseNode * pAssignment = pAssignmentCommalist->getChild(i);
            OSL_ENSURE(pAssignment != nullptr,"OResultSet: pAssignment == NULL");
            OSL_ENSURE(SQL_ISRULE(pAssignment,assignment),"OResultSet: Error in Parse Tree");
            OSL_ENSURE(pAssignment->count() == 3,"OResultSet: pAssignment->count() != 3");

            OSQLParseNode * pCol = pAssignment->getChild(0);
            OSL_ENSURE(pCol != nullptr,"OResultSet: pCol == NULL");

            OSQLParseNode * pComp = pAssignment->getChild(1);
            OSL_ENSURE(pComp != nullptr,"OResultSet: pComp == NULL");
            OSL_ENSURE(pComp->getNodeType() == SQLNodeType::Equal,"OResultSet: pComp->getNodeType() != SQLNodeType::Comparison");
            if (pComp->getTokenValue().toChar() != '=')
            {
                throwFunctionSequenceException(*this);
            }

            OSQLParseNode * pVal = pAssignment->getChild(2);
            OSL_ENSURE(pVal != nullptr,"OResultSet: pVal == NULL");
            aList[0] = pCol->getTokenValue();
            ParseAssignValues(aList,pVal,0);
        }

    }
}

void OStatement_Base::ParseAssignValues(const std::vector< OUString>& aColumnNameList,OSQLParseNode* pRow_Value_Constructor_Elem, sal_Int32 nIndex)
{
    OSL_ENSURE(o3tl::make_unsigned(nIndex) <= aColumnNameList.size(),"SdbFileCursor::ParseAssignValues: nIndex > aColumnNameList.GetTokenCount()");
    OUString aColumnName(aColumnNameList[nIndex]);
    OSL_ENSURE(aColumnName.getLength() > 0,"OResultSet: Column-Name not found");
    OSL_ENSURE(pRow_Value_Constructor_Elem != nullptr,"OResultSet: pRow_Value_Constructor_Elem must not be NULL!");

    if (pRow_Value_Constructor_Elem->getNodeType() == SQLNodeType::String ||
        pRow_Value_Constructor_Elem->getNodeType() == SQLNodeType::IntNum ||
        pRow_Value_Constructor_Elem->getNodeType() == SQLNodeType::ApproxNum)
    {
        // set value:
        SetAssignValue(aColumnName, pRow_Value_Constructor_Elem->getTokenValue());
    }
    else if (SQL_ISTOKEN(pRow_Value_Constructor_Elem,NULL))
    {
        // set NULL
        SetAssignValue(aColumnName, OUString(), true);
    }
    else if (SQL_ISRULE(pRow_Value_Constructor_Elem,parameter))
        parseParamterElem(aColumnName,pRow_Value_Constructor_Elem);
    else
    {
        throwFunctionSequenceException(*this);
    }
}

void OStatement_Base::SetAssignValue(const OUString& aColumnName,
                                     const OUString& aValue,
                                     bool bSetNull,
                                     sal_uInt32 nParameter)
{
    Reference<XPropertySet> xCol;
    m_xColNames->getByName(aColumnName) >>= xCol;
    sal_Int32 nId = Reference<XColumnLocate>(m_xColNames,UNO_QUERY_THROW)->findColumn(aColumnName);
    // does this column actually exist in the file?

    if (!xCol.is())
    {
        // This Column doesn't exist!
        throwFunctionSequenceException(*this);
    }


    // Everything tested and we have the names of the Column.
    // Now allocate one Value, set the value and tie the value to the Row.
    if (bSetNull)
        (*m_aAssignValues)[nId]->setNull();
    else
    {
        switch (::comphelper::getINT32(xCol->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_TYPE))))
        {
            // put criteria depending on the Type as String or double in the variable
        case DataType::CHAR:
        case DataType::VARCHAR:
        case DataType::LONGVARCHAR:
            *(*m_aAssignValues)[nId] = ORowSetValue(aValue);
            //Characterset is already converted, since the entire statement was converted
            break;

        case DataType::BIT:
            if (aValue.equalsIgnoreAsciiCase("TRUE")  || aValue[0] == '1')
                *(*m_aAssignValues)[nId] = true;
            else if (aValue.equalsIgnoreAsciiCase("FALSE") || aValue[0] == '0')
                *(*m_aAssignValues)[nId] = false;
            else
                throwFunctionSequenceException(*this);
            break;
        case DataType::TINYINT:
        case DataType::SMALLINT:
        case DataType::INTEGER:
        case DataType::DECIMAL:
        case DataType::NUMERIC:
        case DataType::REAL:
        case DataType::DOUBLE:
        case DataType::DATE:
        case DataType::TIME:
        case DataType::TIMESTAMP:
            *(*m_aAssignValues)[nId] = ORowSetValue(aValue);
            break;
        default:
            throwFunctionSequenceException(*this);
        }
    }

    // save Parameter-No. (as User Data)
    // SQL_NO_PARAMETER = no Parameter.
    m_aAssignValues->setParameterIndex(nId,nParameter);
    if(nParameter != SQL_NO_PARAMETER)
        m_aParameterIndexes[nParameter] = nId;
}

void OStatement_Base::parseParamterElem(const OUString& /*_sColumnName*/,OSQLParseNode* /*pRow_Value_Constructor_Elem*/)
{
    // do nothing here
}

}// namespace


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