/* -*- 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/macros.h>
#include <connectivity/sqlnode.hxx>
#include <connectivity/sqlerror.hxx>
#include <connectivity/sqlbison_exports.hxx>
#include <connectivity/internalnode.hxx>
#define YYBISON   1
#include <sqlbison.hxx>
#include <connectivity/sqlparse.hxx>
#include <connectivity/sqlscan.hxx>
#include <com/sun/star/lang/Locale.hpp>
#include <com/sun/star/util/XNumberFormatter.hpp>
#include <com/sun/star/util/XNumberFormatTypes.hpp>
#include <com/sun/star/i18n/LocaleData.hpp>
#include <com/sun/star/i18n/NumberFormatIndex.hpp>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/sdbc/XDatabaseMetaData.hpp>
#include <com/sun/star/sdbc/DataType.hpp>
#include <com/sun/star/sdb/XQueriesSupplier.hpp>
#include <com/sun/star/sdb/ErrorCondition.hpp>
#include <com/sun/star/util/XNumberFormatsSupplier.hpp>
#include <com/sun/star/util/XNumberFormats.hpp>
#include <com/sun/star/util/NumberFormat.hpp>
#include <com/sun/star/i18n/KParseType.hpp>
#include <com/sun/star/i18n/KParseTokens.hpp>
#include <com/sun/star/i18n/CharacterClassification.hpp>
#include <connectivity/dbconversion.hxx>
#include <com/sun/star/util/DateTime.hpp>
#include <com/sun/star/util/Time.hpp>
#include <com/sun/star/util/Date.hpp>
#include <TConnection.hxx>
#include <comphelper/numbers.hxx>
#include <connectivity/dbtools.hxx>
#include <connectivity/dbmetadata.hxx>
#include <comphelper/diagnose_ex.hxx>
#include <string.h>
#include <algorithm>
#include <functional>
#include <memory>
#include <string_view>

#include <rtl/ustrbuf.hxx>
#include <sal/log.hxx>
#include <utility>

using namespace ::com::sun::star::sdbc;
using namespace ::com::sun::star::util;
using namespace ::com::sun::star::beans;
using namespace ::com::sun::star::sdb;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::i18n;
using namespace ::com::sun::star;
using namespace ::osl;
using namespace ::dbtools;
using namespace ::comphelper;

namespace
{

    bool lcl_saveConvertToNumber(const Reference< XNumberFormatter > & _xFormatter,sal_Int32 _nKey,const OUString& _sValue,double& _nrValue)
    {
        bool bRet = false;
        try
        {
            _nrValue = _xFormatter->convertStringToNumber(_nKey, _sValue);
            bRet = true;
        }
        catch(Exception&)
        {
        }
        return bRet;
    }

    void replaceAndReset(connectivity::OSQLParseNode*& _pResetNode,connectivity::OSQLParseNode* _pNewNode)
    {
        _pResetNode->getParent()->replaceAndDelete(_pResetNode, _pNewNode);
        _pResetNode = _pNewNode;
    }

    /** quotes a string and search for quotes inside the string and replace them with the new quote
        @param  rValue
            The value to be quoted.
        @param  rQuote
            The quote
        @param  rQuoteToReplace
            The quote to replace with
        @return
            The quoted string.
    */
    OUString SetQuotation(const OUString& rValue, std::u16string_view rQuote, std::u16string_view rQuoteToReplace)
    {
        // Replace quotes with double quotes or the parser gets into problems
        if (!rQuote.empty())
            return rQuote + rValue.replaceAll(rQuote, rQuoteToReplace) + rQuote;
        return rValue;
    }

    bool columnMatchP(const connectivity::OSQLParseNode* pSubTree, const connectivity::SQLParseNodeParameter& rParam)
    {
        using namespace connectivity;
        assert(SQL_ISRULE(pSubTree,column_ref));

        if(!rParam.xField.is())
            return false;

        // retrieve the field's name & table range
        OUString aFieldName;
        try
        {
            sal_Int32 nNamePropertyId = PROPERTY_ID_NAME;
            if ( rParam.xField->getPropertySetInfo()->hasPropertyByName( OMetaConnection::getPropMap().getNameByIndex( PROPERTY_ID_REALNAME ) ) )
                nNamePropertyId = PROPERTY_ID_REALNAME;
            rParam.xField->getPropertyValue( OMetaConnection::getPropMap().getNameByIndex( nNamePropertyId ) ) >>= aFieldName;
        }
        catch ( Exception& )
        {
        }

        if(!pSubTree->count())
            return false;

        const OSQLParseNode* pCol = pSubTree->getChild(pSubTree->count()-1);
        if (SQL_ISRULE(pCol,column_val))
        {
            assert(pCol->count() == 1);
            pCol = pCol->getChild(0);
        }
        const OSQLParseNode* pTable(nullptr);
        switch (pSubTree->count())
        {
        case 1:
            break;
        case 3:
            pTable = pSubTree->getChild(0);
            break;
        case 5:
        case 7:
            SAL_WARN("connectivity.parse", "SQL: catalog and/or schema in column_ref in predicate");
            break;
        default:
            SAL_WARN("connectivity.parse", "columnMatchP: SQL grammar changed; column_ref has " << pSubTree->count() << " children");
            assert(false);
            break;
        }
        // TODO: not all DBMS match column names case-insensitively...
        // see XDatabaseMetaData::supportsMixedCaseIdentifiers()
        // and XDatabaseMetaData::supportsMixedCaseQuotedIdentifiers()
        if  (   // table name matches (or no table name)?
                ( !pTable || pTable->getTokenValue().equalsIgnoreAsciiCase(rParam.sPredicateTableAlias) )
             && // column name matches?
                pCol->getTokenValue().equalsIgnoreAsciiCase(aFieldName)
            )
            return true;
        return false;
    }
}

namespace connectivity
{

SQLParseNodeParameter::SQLParseNodeParameter( const Reference< XConnection >& _rxConnection,
        const Reference< XNumberFormatter >& _xFormatter, const Reference< XPropertySet >& _xField,
        OUString _sPredicateTableAlias,
        const Locale& _rLocale, const IParseContext* _pContext,
        bool _bIntl, bool _bQuote, OUString _sDecSep, bool _bPredicate, bool _bParseToSDBC )
    :rLocale(_rLocale)
    ,aMetaData( _rxConnection )
    ,pParser( nullptr )
    ,pSubQueryHistory( std::make_shared<QueryNameSet>() )
    ,xFormatter(_xFormatter)
    ,xField(_xField)
    ,sPredicateTableAlias(std::move(_sPredicateTableAlias))
    ,m_rContext( _pContext ? *_pContext : OSQLParser::s_aDefaultContext )
    ,sDecSep(std::move(_sDecSep))
    ,bQuote(_bQuote)
    ,bInternational(_bIntl)
    ,bPredicate(_bPredicate)
    ,bParseToSDBCLevel( _bParseToSDBC )
{
}

OUString OSQLParseNode::convertDateString(const SQLParseNodeParameter& rParam, std::u16string_view rString)
{
    Date aDate = DBTypeConversion::toDate(rString);
    Reference< XNumberFormatsSupplier > xSupplier(rParam.xFormatter->getNumberFormatsSupplier());
    Reference< XNumberFormatTypes >     xTypes(xSupplier->getNumberFormats(), UNO_QUERY);

    double fDate = DBTypeConversion::toDouble(aDate,DBTypeConversion::getNULLDate(xSupplier));
    sal_Int32 nKey = xTypes->getFormatIndex(NumberFormatIndex::DATE_SYS_DDMMYYYY, rParam.rLocale);
    return rParam.xFormatter->convertNumberToString(nKey, fDate);
}


OUString OSQLParseNode::convertDateTimeString(const SQLParseNodeParameter& rParam, const OUString& rString)
{
    DateTime aDate = DBTypeConversion::toDateTime(rString);
    Reference< XNumberFormatsSupplier >  xSupplier(rParam.xFormatter->getNumberFormatsSupplier());
    Reference< XNumberFormatTypes >  xTypes(xSupplier->getNumberFormats(), UNO_QUERY);

    double fDateTime = DBTypeConversion::toDouble(aDate,DBTypeConversion::getNULLDate(xSupplier));
    sal_Int32 nKey = xTypes->getFormatIndex(NumberFormatIndex::DATETIME_SYS_DDMMYYYY_HHMMSS, rParam.rLocale);
    return rParam.xFormatter->convertNumberToString(nKey, fDateTime);
}


OUString OSQLParseNode::convertTimeString(const SQLParseNodeParameter& rParam, std::u16string_view rString)
{
    css::util::Time aTime = DBTypeConversion::toTime(rString);
    Reference< XNumberFormatsSupplier >  xSupplier(rParam.xFormatter->getNumberFormatsSupplier());

    Reference< XNumberFormatTypes >  xTypes(xSupplier->getNumberFormats(), UNO_QUERY);

    double fTime = DBTypeConversion::toDouble(aTime);
    sal_Int32 nKey = xTypes->getFormatIndex(NumberFormatIndex::TIME_HHMMSS, rParam.rLocale);
    return rParam.xFormatter->convertNumberToString(nKey, fTime);
}


void OSQLParseNode::parseNodeToStr(OUString& rString,
                                   const Reference< XConnection >& _rxConnection,
                                   const IParseContext* pContext,
                                   bool _bIntl,
                                   bool _bQuote) const
{
    parseNodeToStr(
        rString, _rxConnection, nullptr, nullptr, OUString(),
        pContext ? pContext->getPreferredLocale() : OParseContext::getDefaultLocale(),
        pContext, _bIntl, _bQuote, u"."_ustr, false );
}


void OSQLParseNode::parseNodeToPredicateStr(OUString& rString,
                                              const Reference< XConnection >& _rxConnection,
                                              const Reference< XNumberFormatter > & xFormatter,
                                              const css::lang::Locale& rIntl,
                                              const OUString& rDec,
                                              const IParseContext* pContext ) const
{
    OSL_ENSURE(xFormatter.is(), "OSQLParseNode::parseNodeToPredicateStr:: no formatter!");

    if (xFormatter.is())
        parseNodeToStr(rString, _rxConnection, xFormatter, nullptr, OUString(), rIntl, pContext, true, true, rDec, true);
}


void OSQLParseNode::parseNodeToPredicateStr(OUString& rString,
                                              const Reference< XConnection > & _rxConnection,
                                              const Reference< XNumberFormatter > & xFormatter,
                                              const Reference< XPropertySet > & _xField,
                                              const OUString &_sPredicateTableAlias,
                                              const css::lang::Locale& rIntl,
                                              const OUString& rDec,
                                              const IParseContext* pContext ) const
{
    OSL_ENSURE(xFormatter.is(), "OSQLParseNode::parseNodeToPredicateStr:: no formatter!");

    if (xFormatter.is())
        parseNodeToStr( rString, _rxConnection, xFormatter, _xField, _sPredicateTableAlias, rIntl, pContext, true, true, rDec, true );
}


void OSQLParseNode::parseNodeToStr(OUString& rString,
                      const Reference< XConnection > & _rxConnection,
                      const Reference< XNumberFormatter > & xFormatter,
                      const Reference< XPropertySet > & _xField,
                      const OUString &_sPredicateTableAlias,
                      const css::lang::Locale& rIntl,
                      const IParseContext* pContext,
                      bool _bIntl,
                      bool _bQuote,
                      const OUString& _rDecSep,
                      bool _bPredicate) const
{
    OSL_ENSURE( _rxConnection.is(), "OSQLParseNode::parseNodeToStr: invalid connection!" );

    if ( !_rxConnection.is() )
        return;

    OUStringBuffer sBuffer(rString);
    try
    {
        OSQLParseNode::impl_parseNodeToString_throw( sBuffer,
            SQLParseNodeParameter(
                 _rxConnection, xFormatter, _xField, _sPredicateTableAlias, rIntl, pContext,
                _bIntl, _bQuote, _rDecSep, _bPredicate, false
            ) );
    }
    catch( const SQLException& )
    {
        SAL_WARN( "connectivity.parse", "OSQLParseNode::parseNodeToStr: this should not throw!" );
        // our callers don't expect this method to throw anything. The only known situation
        // where impl_parseNodeToString_throw can throw is when there is a cyclic reference
        // in the sub queries, but this cannot be the case here, as we do not parse to
        // SDBC level.
    }
    rString = sBuffer.makeStringAndClear();
}

bool OSQLParseNode::parseNodeToExecutableStatement( OUString& _out_rString, const Reference< XConnection >& _rxConnection,
    OSQLParser& _rParser, css::sdbc::SQLException* _pErrorHolder ) const
{
    OSL_PRECOND( _rxConnection.is(), "OSQLParseNode::parseNodeToExecutableStatement: invalid connection!" );
    SQLParseNodeParameter aParseParam( _rxConnection,
        nullptr, nullptr, OUString(), OParseContext::getDefaultLocale(), nullptr, false, true, u"."_ustr, false, true );

    if ( aParseParam.aMetaData.supportsSubqueriesInFrom() )
    {
        Reference< XQueriesSupplier > xSuppQueries( _rxConnection, UNO_QUERY );
        OSL_ENSURE( xSuppQueries.is(), "OSQLParseNode::parseNodeToExecutableStatement: cannot substitute everything without a QueriesSupplier!" );
        if ( xSuppQueries.is() )
            aParseParam.xQueries = xSuppQueries->getQueries();
    }

    aParseParam.pParser = &_rParser;

    // LIMIT keyword differs in Firebird
    OSQLParseNode* pTableExp = getChild(3);
    Reference< XDatabaseMetaData > xMeta( _rxConnection->getMetaData() );
    OUString sLimitValue;
    if( pTableExp->getChild(6)->count() >= 2 && pTableExp->getChild(6)->getChild(1)
            && (xMeta->getURL().equalsIgnoreAsciiCase("sdbc:embedded:firebird")
                || xMeta->getURL().startsWithIgnoreAsciiCase("sdbc:firebird:")))
    {
        sLimitValue = pTableExp->getChild(6)->getChild(1)->getTokenValue();
        delete pTableExp->removeAt(6);
    }

    _out_rString.clear();
    OUStringBuffer sBuffer;
    bool bSuccess = false;
    try
    {
        impl_parseNodeToString_throw( sBuffer, aParseParam );
        bSuccess = true;
    }
    catch( const SQLException& e )
    {
        if ( _pErrorHolder )
            *_pErrorHolder = e;
    }

    if(sLimitValue.getLength() > 0)
    {
        static constexpr char SELECT_KEYWORD[] = "SELECT";
        sBuffer.insert(sBuffer.indexOf(SELECT_KEYWORD) + strlen(SELECT_KEYWORD),
                Concat2View(" FIRST " + sLimitValue));
    }

    _out_rString = sBuffer.makeStringAndClear();
    return bSuccess;
}


namespace
{
    bool lcl_isAliasNamePresent( const OSQLParseNode& _rTableNameNode )
    {
        return !OSQLParseNode::getTableRange(_rTableNameNode.getParent()).isEmpty();
    }
}


void OSQLParseNode::impl_parseNodeToString_throw(OUStringBuffer& rString, const SQLParseNodeParameter& rParam, bool bSimple) const
{
    if ( isToken() )
    {
        parseLeaf(rString,rParam);
        return;
    }

    // Let's see how many nodes this subtree has
    sal_uInt32 nCount = count();

    bool bHandled = false;
    switch ( getKnownRuleID() )
    {
    // special handling for parameters
    case parameter:
    {
        bSimple=false;
        if(!rString.isEmpty())
            rString.append(" ");
        if (nCount == 1)    // ?
            m_aChildren[0]->impl_parseNodeToString_throw( rString, rParam, false );
        else if (rParam.bParseToSDBCLevel && rParam.aMetaData.shouldSubstituteParameterNames())
        {
            rString.append("?");
        }
        else if (nCount == 2)   // :Name
        {
            m_aChildren[0]->impl_parseNodeToString_throw( rString, rParam, false );
            rString.append(m_aChildren[1]->m_aNodeValue);
        }                   // [Name]
        else
        {
            assert (nCount == 3);
            m_aChildren[0]->impl_parseNodeToString_throw( rString, rParam, false );
            rString.append(m_aChildren[1]->m_aNodeValue);
            rString.append(m_aChildren[2]->m_aNodeValue);
        }
        bHandled = true;
    }
    break;

    // table refs
    case table_ref:
        bSimple=false;
        if (  ( nCount == 2 ) || ( nCount == 3 ) || ( nCount == 5 ) )
        {
            impl_parseTableRangeNodeToString_throw( rString, rParam );
            bHandled = true;
        }
        break;

    // table name - might be a query name
    case table_name:
        bSimple=false;
        bHandled = impl_parseTableNameNodeToString_throw( rString, rParam );
        break;

    case as_clause:
        bSimple=false;
        assert(nCount == 0 || nCount == 2);
        if (nCount == 2)
        {
            if ( rParam.aMetaData.generateASBeforeCorrelationName() )
                rString.append(" AS ");
            m_aChildren[1]->impl_parseNodeToString_throw( rString, rParam, false );
        }
        bHandled = true;
        break;

    case opt_as:
        assert(nCount == 0);
        bHandled = true;
        break;

    case like_predicate:
        // Depending on whether international is given, LIKE is treated differently
        // international: *, ? are placeholders
        // else SQL92 conform: %, _
        impl_parseLikeNodeToString_throw( rString, rParam, bSimple );
        bHandled = true;
        break;

    case general_set_fct:
    case set_fct_spec:
    case position_exp:
    case extract_exp:
    case length_exp:
    case char_value_fct:
        bSimple=false;
        if (!addDateValue(rString, rParam))
        {
            // Do not quote function name
            SQLParseNodeParameter aNewParam(rParam);
            aNewParam.bQuote = ( SQL_ISRULE(this,length_exp)    || SQL_ISRULE(this,char_value_fct) );

            m_aChildren[0]->impl_parseNodeToString_throw( rString, aNewParam, false );
            aNewParam.bQuote = rParam.bQuote;
            //aNewParam.bPredicate = sal_False; // disable [ ] around names // look at i73215
            OUStringBuffer aStringPara;
            for (sal_uInt32 i=1; i<nCount; i++)
            {
                const OSQLParseNode * pSubTree = m_aChildren[i].get();
                if (pSubTree)
                {
                    pSubTree->impl_parseNodeToString_throw( aStringPara, aNewParam, false );

                    // In the comma lists, put commas in-between all subtrees
                    if ((m_eNodeType == SQLNodeType::CommaListRule)     && (i < (nCount - 1)))
                        aStringPara.append(",");
                }
                else
                    i++;
            }
            rString.append(aStringPara);
        }
        bHandled = true;
        break;

    case factor:
        bSimple = false;
        if (nCount == 2 && m_aChildren[0] && m_aChildren[1]
            && (SQL_ISPUNCTUATION(m_aChildren[0], "-") || SQL_ISPUNCTUATION(m_aChildren[0], "+"))
            && (m_aChildren[1]->getNodeType() == SQLNodeType::IntNum
                || m_aChildren[1]->getNodeType() == SQLNodeType::ApproxNum))
        {
            // A signed number ("+" or "-" plus either IntNum or ApproxNum)
            // The default processing would first add the sign, then process the number, which
            // would see that rString is not empty already, and insert a space between the sign
            // and the digits. Avoid that unneeded space.
            OUStringBuffer aFactorPara;
            m_aChildren[1]->impl_parseNodeToString_throw(aFactorPara, rParam, bSimple);
            // Insert a space before the signed number, similar to parseLeaf for IntNum / ApproxNum
            if (!rString.isEmpty())
                rString.append(" ");
            rString.append(m_aChildren[0]->getTokenValue() + aFactorPara);
            bHandled = true;
        }
        break;

    case odbc_call_spec:
    case subquery:
    case term:
    case window_function:
    case cast_spec:
    case num_value_exp:
        bSimple = false;
        break;
    default:
        break;
    }   // switch ( getKnownRuleID() )

    if ( bHandled )
        return;

    for (auto i = m_aChildren.begin(); i != m_aChildren.end();)
    {
        const OSQLParseNode* pSubTree = i->get();
        if ( !pSubTree )
        {
            ++i;
            continue;
        }

        SQLParseNodeParameter aNewParam(rParam);

        // don't replace the field for subqueries
        if (rParam.xField.is() && SQL_ISRULE(pSubTree,subquery))
            aNewParam.xField = nullptr;

        // When we are building a criterion inside a query view,
        // simplify criterion display by removing:
        //   "currentFieldName"
        //   "currentFieldName" =
        // but only in simple expressions.
        // This means anything that is made of:
        // (see the rules conditionalised by inPredicateCheck() in sqlbison.y).
        //  - parentheses
        //  - logical operators (and, or, not)
        //  - comparison operators (IS, =, >, <, BETWEEN, LIKE, ...)
        // but *not* e.g. in function arguments
        if (bSimple && rParam.bPredicate && rParam.xField.is() && SQL_ISRULE(pSubTree,column_ref))
        {
            if (columnMatchP(pSubTree, rParam))
            {
                // skip field
                ++i;
                // if the following node is the comparison operator'=',
                // we filter it as well
                if (SQL_ISRULE(this, comparison_predicate))
                {
                    if(i != m_aChildren.end())
                    {
                        pSubTree = i->get();
                        if (pSubTree && pSubTree->getNodeType() == SQLNodeType::Equal)
                            ++i;
                    }
                }
            }
            else
            {
                pSubTree->impl_parseNodeToString_throw( rString, aNewParam, bSimple );
                ++i;

                // In the comma lists, put commas in-between all subtrees
                if ((m_eNodeType == SQLNodeType::CommaListRule)     && (i != m_aChildren.end()))
                    rString.append(",");
            }
        }
        else
        {
            pSubTree->impl_parseNodeToString_throw( rString, aNewParam, bSimple );
            ++i;

            // In the comma lists, put commas in-between all subtrees
            if ((m_eNodeType == SQLNodeType::CommaListRule)     && (i != m_aChildren.end()))
            {
                if (SQL_ISRULE(this,value_exp_commalist) && rParam.bPredicate)
                    rString.append(";");
                else
                    rString.append(",");
            }
        }
        // The right hand-side of these operators is not simple
        switch ( getKnownRuleID() )
        {
        case general_set_fct:
        case set_fct_spec:
        case position_exp:
        case extract_exp:
        case length_exp:
        case char_value_fct:
        case odbc_call_spec:
        case subquery:
        case comparison_predicate:
        case between_predicate:
        case like_predicate:
        case test_for_null:
        case in_predicate:
        case existence_test:
        case unique_test:
        case all_or_any_predicate:
        case join_condition:
        case comparison_predicate_part_2:
        case parenthesized_boolean_value_expression:
        case other_like_predicate_part_2:
        case between_predicate_part_2:
            bSimple=false;
            break;
        default:
            break;
        }
    }
}


bool OSQLParseNode::impl_parseTableNameNodeToString_throw( OUStringBuffer& rString, const SQLParseNodeParameter& rParam ) const
{
    // is the table_name part of a table_ref?
    OSL_ENSURE( getParent(), "OSQLParseNode::impl_parseTableNameNodeToString_throw: table_name without parent?" );
    if ( !getParent() || ( getParent()->getKnownRuleID() != table_ref ) )
        return false;

    // if it's a query, maybe we need to substitute the SQL statement ...
    if ( !rParam.bParseToSDBCLevel )
        return false;

    if ( !rParam.xQueries.is() )
        // connection does not support queries in queries, or was no query supplier
        return false;

    try
    {
        OUString sTableOrQueryName( getChild(0)->getTokenValue() );
        bool bIsQuery = rParam.xQueries->hasByName( sTableOrQueryName );
        if ( !bIsQuery )
            return false;

        // avoid recursion (e.g. "foo" defined as "SELECT * FROM bar" and "bar" defined as "SELECT * FROM foo".
        if ( rParam.pSubQueryHistory->find( sTableOrQueryName ) != rParam.pSubQueryHistory->end() )
        {
            OSL_ENSURE( rParam.pParser, "OSQLParseNode::impl_parseTableNameNodeToString_throw: no parser?" );
            if ( rParam.pParser )
            {
                const SQLError& rErrors( rParam.pParser->getErrorHelper() );
                rErrors.raiseException( sdb::ErrorCondition::PARSER_CYCLIC_SUB_QUERIES );
            }
            else
            {
                SQLError aErrors;
                aErrors.raiseException( sdb::ErrorCondition::PARSER_CYCLIC_SUB_QUERIES );
            }
        }
        rParam.pSubQueryHistory->insert( sTableOrQueryName );

        Reference< XPropertySet > xQuery( rParam.xQueries->getByName( sTableOrQueryName ), UNO_QUERY_THROW );

        // substitute the query name with the constituting command
        OUString sCommand;
        OSL_VERIFY( xQuery->getPropertyValue( OMetaConnection::getPropMap().getNameByIndex( PROPERTY_ID_COMMAND ) ) >>= sCommand );

        bool bEscapeProcessing = false;
        OSL_VERIFY( xQuery->getPropertyValue( OMetaConnection::getPropMap().getNameByIndex( PROPERTY_ID_ESCAPEPROCESSING ) ) >>= bEscapeProcessing );

        // the query we found here might itself be based on another query, so parse it recursively
        OSL_ENSURE( rParam.pParser, "OSQLParseNode::impl_parseTableNameNodeToString_throw: cannot analyze sub queries without a parser!" );
        if ( bEscapeProcessing && rParam.pParser )
        {
            OUString sError;
            std::unique_ptr< OSQLParseNode > pSubQueryNode( rParam.pParser->parseTree( sError, sCommand ) );
            if (pSubQueryNode)
            {
                // parse the sub-select to SDBC level, too
                OUStringBuffer sSubSelect;
                pSubQueryNode->impl_parseNodeToString_throw( sSubSelect, rParam, false );
                if ( !sSubSelect.isEmpty() )
                    sCommand = sSubSelect.makeStringAndClear();
            }
        }

        rString.append( " ( " );
        rString.append(sCommand);
        rString.append( " )" );

        // append the query name as table alias, since it might be referenced in other
        // parts of the statement - but only if there's no other alias name present
        if ( !lcl_isAliasNamePresent( *this ) )
        {
            rString.append( " AS " );
            if ( rParam.bQuote )
                rString.append(SetQuotation( sTableOrQueryName,
                    rParam.aMetaData.getIdentifierQuoteString(), rParam.aMetaData.getIdentifierQuoteString() ));
        }

        // don't forget to remove the query name from the history, else multiple inclusions
        // won't work
        // #i69227# / 2006-10-10 / frank.schoenheit@sun.com
        rParam.pSubQueryHistory->erase( sTableOrQueryName );

        return true;
    }
    catch( const SQLException& )
    {
        throw;
    }
    catch( const Exception& )
    {
        DBG_UNHANDLED_EXCEPTION("connectivity.parse");
    }
    return false;
}


void OSQLParseNode::impl_parseTableRangeNodeToString_throw(OUStringBuffer& rString, const SQLParseNodeParameter& rParam) const
{
    OSL_PRECOND(  ( count() == 2 ) || ( count() == 3 ) || ( count() == 5 ) ,"Illegal count");

    // rString += " ";
    std::for_each(m_aChildren.begin(),m_aChildren.end(),
        [&] (std::unique_ptr<OSQLParseNode> const & pNode) { pNode->impl_parseNodeToString_throw(rString, rParam, false); });
}


void OSQLParseNode::impl_parseLikeNodeToString_throw( OUStringBuffer& rString, const SQLParseNodeParameter& rParam, bool bSimple ) const
{
    assert(SQL_ISRULE(this,like_predicate));
    OSL_ENSURE(count() == 2,"count != 2: Prepare for GPF");

    const OSQLParseNode* pEscNode = nullptr;
    const OSQLParseNode* pParaNode = nullptr;

    const SQLParseNodeParameter& aNewParam(rParam);
    //aNewParam.bQuote = sal_True; // why setting this to true? @see https://bz.apache.org/ooo/show_bug.cgi?id=75557

    if ( !(bSimple && rParam.bPredicate && rParam.xField.is() && SQL_ISRULE(m_aChildren[0],column_ref) && columnMatchP(m_aChildren[0].get(), rParam)) )
        m_aChildren[0]->impl_parseNodeToString_throw( rString, aNewParam, bSimple );

    const OSQLParseNode* pPart2 = m_aChildren[1].get();
    pPart2->getChild(0)->impl_parseNodeToString_throw( rString, aNewParam, false );
    pPart2->getChild(1)->impl_parseNodeToString_throw( rString, aNewParam, false );
    pParaNode = pPart2->getChild(2);
    pEscNode  = pPart2->getChild(3);

    if (pParaNode->isToken())
    {
        OUString aStr = ConvertLikeToken(pParaNode, pEscNode, rParam.bInternational);
        rString.append(" ");
        rString.append(SetQuotation(aStr, u"\'", u"\'\'"));
    }
    else
        pParaNode->impl_parseNodeToString_throw( rString, aNewParam, false );

    pEscNode->impl_parseNodeToString_throw( rString, aNewParam, false );
}


bool OSQLParseNode::getTableComponents(const OSQLParseNode* _pTableNode,
                                            css::uno::Any &_rCatalog,
                                            OUString &_rSchema,
                                            OUString &_rTable,
                                            const Reference< XDatabaseMetaData >& _xMetaData)
{
    OSL_ENSURE(_pTableNode,"Wrong use of getTableComponents! _pTableNode is not allowed to be null!");
    if(_pTableNode)
    {
        const bool bSupportsCatalog = _xMetaData.is() && _xMetaData->supportsCatalogsInDataManipulation();
        const bool bSupportsSchema = _xMetaData.is() && _xMetaData->supportsSchemasInDataManipulation();
        const OSQLParseNode* pTableNode = _pTableNode;
        // clear the parameter given
        _rCatalog = Any();
        _rSchema.clear();
        _rTable.clear();
        // see rule catalog_name: in sqlbison.y
        if (SQL_ISRULE(pTableNode,catalog_name))
        {
            OSL_ENSURE(pTableNode->getChild(0) && pTableNode->getChild(0)->isToken(),"Invalid parsenode!");
            _rCatalog <<= pTableNode->getChild(0)->getTokenValue();
            pTableNode = pTableNode->getChild(2);
        }
        // check if we have schema_name rule
        if(SQL_ISRULE(pTableNode,schema_name))
        {
            if ( bSupportsCatalog && !bSupportsSchema )
                _rCatalog <<= pTableNode->getChild(0)->getTokenValue();
            else
                _rSchema = pTableNode->getChild(0)->getTokenValue();
            pTableNode = pTableNode->getChild(2);
        }
        // check if we have table_name rule
        if(SQL_ISRULE(pTableNode,table_name))
        {
            _rTable = pTableNode->getChild(0)->getTokenValue();
        }
        else
        {
            SAL_WARN( "connectivity.parse","Error in parse tree!");
        }
    }
    return !_rTable.isEmpty();
}

void OSQLParser::killThousandSeparator(OSQLParseNode* pLiteral)
{
    if ( pLiteral )
    {
        auto& s_xLocaleData = getLocaleData();
        if ( s_xLocaleData.get()->get()->getLocaleItem( m_pData->aLocale ).decimalSeparator.toChar() == ',' )
        {
            pLiteral->m_aNodeValue = pLiteral->m_aNodeValue.replace('.', sal_Unicode());
            // and replace decimal
            pLiteral->m_aNodeValue = pLiteral->m_aNodeValue.replace(',', '.');
        }
        else
            pLiteral->m_aNodeValue = pLiteral->m_aNodeValue.replace(',', sal_Unicode());
    }
}

OSQLParseNode* OSQLParser::convertNode(sal_Int32 nType, OSQLParseNode* pLiteral)
{
    if ( !pLiteral )
        return nullptr;

    OSQLParseNode* pReturn = pLiteral;

    if ( ( pLiteral->isRule() && !SQL_ISRULE(pLiteral,value_exp) ) || SQL_ISTOKEN(pLiteral,FALSE) || SQL_ISTOKEN(pLiteral,TRUE) )
    {
        switch(nType)
        {
            case DataType::CHAR:
            case DataType::VARCHAR:
            case DataType::LONGVARCHAR:
            case DataType::CLOB:
                if ( !SQL_ISRULE(pReturn,char_value_exp) && !buildStringNodes(pReturn) )
                    pReturn = nullptr;
                break;
            default:
                break;
        }
    }
    else
    {
        switch(pLiteral->getNodeType())
        {
        case SQLNodeType::String:
            switch(nType)
            {
                case DataType::CHAR:
                case DataType::VARCHAR:
                case DataType::LONGVARCHAR:
                case DataType::CLOB:
                    break;
                case DataType::DATE:
                case DataType::TIME:
                case DataType::TIMESTAMP:
                    if (m_xFormatter.is())
                        pReturn = buildDate( nType, pReturn);
                    break;
                default:
                    m_sErrorMessage = m_pContext->getErrorMessage(IParseContext::ErrorCode::InvalidCompare);
                    break;
            }
            break;
        case SQLNodeType::AccessDate:
            switch(nType)
            {
                case DataType::DATE:
                case DataType::TIME:
                case DataType::TIMESTAMP:
                    if ( m_xFormatter.is() )
                        pReturn = buildDate( nType, pReturn);
                    else
                        m_sErrorMessage = m_pContext->getErrorMessage(IParseContext::ErrorCode::InvalidDateCompare);
                    break;
                default:
                    m_sErrorMessage = m_pContext->getErrorMessage(IParseContext::ErrorCode::InvalidCompare);
                    break;
            }
            break;
        case SQLNodeType::IntNum:
            switch(nType)
            {
                case DataType::BIT:
                case DataType::BOOLEAN:
                case DataType::DECIMAL:
                case DataType::NUMERIC:
                case DataType::TINYINT:
                case DataType::SMALLINT:
                case DataType::INTEGER:
                case DataType::BIGINT:
                case DataType::FLOAT:
                case DataType::REAL:
                case DataType::DOUBLE:
                    // kill thousand separators if any
                    killThousandSeparator(pReturn);
                    break;
                case DataType::CHAR:
                case DataType::VARCHAR:
                case DataType::LONGVARCHAR:
                case DataType::CLOB:
                    pReturn = buildNode_STR_NUM(pReturn);
                    break;
                default:
                    m_sErrorMessage = m_pContext->getErrorMessage(IParseContext::ErrorCode::InvalidIntCompare);
                    break;
            }
            break;
        case SQLNodeType::ApproxNum:
            switch(nType)
            {
                case DataType::DECIMAL:
                case DataType::NUMERIC:
                case DataType::FLOAT:
                case DataType::REAL:
                case DataType::DOUBLE:
                    // kill thousand separators if any
                    killThousandSeparator(pReturn);
                    break;
                case DataType::CHAR:
                case DataType::VARCHAR:
                case DataType::LONGVARCHAR:
                case DataType::CLOB:
                    pReturn = buildNode_STR_NUM(pReturn);
                    break;
                case DataType::INTEGER:
                default:
                    m_sErrorMessage = m_pContext->getErrorMessage(IParseContext::ErrorCode::InvalidRealCompare);
                    break;
            }
            break;
        default:
            ;
        }
    }
    return pReturn;
}

sal_Int16 OSQLParser::buildPredicateRule(OSQLParseNode*& pAppend, OSQLParseNode* pLiteral, OSQLParseNode* pCompare, OSQLParseNode* pLiteral2)
{
    OSL_ENSURE(inPredicateCheck(),"Only in predicate check allowed!");
    sal_Int16 nErg = 0;
    if ( m_xField.is() )
    {
        sal_Int32 nType = 0;
        try
        {
            m_xField->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_TYPE)) >>= nType;
        }
        catch( Exception& )
        {
            return nErg;
        }

        OSQLParseNode* pNode1 = convertNode(nType,pLiteral);
        if ( pNode1 )
        {
            OSQLParseNode* pNode2 = convertNode(nType,pLiteral2);
            if ( m_sErrorMessage.isEmpty() )
                nErg = buildNode(pAppend,pCompare,pNode1,pNode2);
        }
    }
    if (!pCompare->getParent()) // I have no parent so I was not used and I must die :-)
        delete pCompare;
    return nErg;
}

sal_Int16 OSQLParser::buildLikeRule(OSQLParseNode* pAppend, OSQLParseNode*& pLiteral, const OSQLParseNode* pEscape)
{
    sal_Int16 nErg = 0;
    sal_Int32 nType = 0;

    if (!m_xField.is())
        return nErg;
    try
    {
        Any aValue;
        {
            aValue = m_xField->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_TYPE));
            aValue >>= nType;
        }
    }
    catch( Exception& )
    {
        return nErg;
    }

    switch (nType)
    {
        case DataType::CHAR:
        case DataType::VARCHAR:
        case DataType::LONGVARCHAR:
        case DataType::CLOB:
            if(pLiteral->isRule())
            {
                pAppend->append(pLiteral);
                nErg = 1;
            }
            else
            {
                switch(pLiteral->getNodeType())
                {
                    case SQLNodeType::String:
                        pLiteral->m_aNodeValue = ConvertLikeToken(pLiteral, pEscape, false);
                        pAppend->append(pLiteral);
                        nErg = 1;
                        break;
                    case SQLNodeType::ApproxNum:
                        if (m_xFormatter.is() && m_nFormatKey)
                        {
                            sal_Int16 nScale = 0;
                            try
                            {
                                Any aValue = getNumberFormatProperty( m_xFormatter, m_nFormatKey, u"Decimals"_ustr );
                                aValue >>= nScale;
                            }
                            catch( Exception& )
                            {
                            }

                            pAppend->append(new OSQLInternalNode(stringToDouble(pLiteral->getTokenValue(),nScale),SQLNodeType::String));
                        }
                        else
                            pAppend->append(new OSQLInternalNode(pLiteral->getTokenValue(),SQLNodeType::String));

                        delete pLiteral;
                        nErg = 1;
                        break;
                    default:
                        m_sErrorMessage = m_pContext->getErrorMessage(IParseContext::ErrorCode::ValueNoLike);
                        m_sErrorMessage = m_sErrorMessage.replaceAt(m_sErrorMessage.indexOf("#1"),2,pLiteral->getTokenValue());
                        break;
                }
            }
            break;
        default:
            m_sErrorMessage = m_pContext->getErrorMessage(IParseContext::ErrorCode::FieldNoLike);
            break;
    }
    return nErg;
}

OSQLParseNode* OSQLParser::buildNode_Date(const double& fValue, sal_Int32 nType)
{
    OSQLParseNode* pNewNode = new OSQLInternalNode("", SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::set_fct_spec));
    pNewNode->append(new OSQLInternalNode("{", SQLNodeType::Punctuation));
    OSQLParseNode* pDateNode = new OSQLInternalNode("", SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::odbc_fct_spec));
    pNewNode->append(pDateNode);
    pNewNode->append(new OSQLInternalNode("}", SQLNodeType::Punctuation));

    switch (nType)
    {
        case DataType::DATE:
        {
            Date aDate = DBTypeConversion::toDate(fValue,DBTypeConversion::getNULLDate(m_xFormatter->getNumberFormatsSupplier()));
            OUString aString = DBTypeConversion::toDateString(aDate);
            pDateNode->append(new OSQLInternalNode("", SQLNodeType::Keyword, SQL_TOKEN_D));
            pDateNode->append(new OSQLInternalNode(aString, SQLNodeType::String));
            break;
        }
        case DataType::TIME:
        {
            css::util::Time aTime = DBTypeConversion::toTime(fValue);
            OUString aString = DBTypeConversion::toTimeString(aTime);
            pDateNode->append(new OSQLInternalNode("", SQLNodeType::Keyword, SQL_TOKEN_T));
            pDateNode->append(new OSQLInternalNode(aString, SQLNodeType::String));
            break;
        }
        case DataType::TIMESTAMP:
        {
            DateTime aDateTime = DBTypeConversion::toDateTime(fValue,DBTypeConversion::getNULLDate(m_xFormatter->getNumberFormatsSupplier()));
            if (aDateTime.Seconds || aDateTime.Minutes || aDateTime.Hours)
            {
                OUString aString = DBTypeConversion::toDateTimeString(aDateTime);
                pDateNode->append(new OSQLInternalNode("", SQLNodeType::Keyword, SQL_TOKEN_TS));
                pDateNode->append(new OSQLInternalNode(aString, SQLNodeType::String));
            }
            else
            {
                Date aDate(aDateTime.Day,aDateTime.Month,aDateTime.Year);
                pDateNode->append(new OSQLInternalNode("", SQLNodeType::Keyword, SQL_TOKEN_D));
                pDateNode->append(new OSQLInternalNode(DBTypeConversion::toDateString(aDate), SQLNodeType::String));
            }
            break;
        }
    }

    return pNewNode;
}

OSQLParseNode* OSQLParser::buildNode_STR_NUM(OSQLParseNode*& _pLiteral)
{
    OSQLParseNode* pReturn = nullptr;
    if ( _pLiteral )
    {
        if (m_nFormatKey)
        {
            sal_Int16 nScale = 0;
            try
            {
                Any aValue = getNumberFormatProperty( m_xFormatter, m_nFormatKey, u"Decimals"_ustr );
                aValue >>= nScale;
            }
            catch( Exception& )
            {
            }

            pReturn = new OSQLInternalNode(stringToDouble(_pLiteral->getTokenValue(),nScale),SQLNodeType::String);
        }
        else
            pReturn = new OSQLInternalNode(_pLiteral->getTokenValue(),SQLNodeType::String);

        delete _pLiteral;
        _pLiteral = nullptr;
    }
    return pReturn;
}

OUString OSQLParser::stringToDouble(const OUString& _rValue,sal_Int16 _nScale)
{
    OUString aValue;
    if(!m_xCharClass.is())
        m_xCharClass  = CharacterClassification::create( m_xContext );
    auto& s_xLocaleData = getLocaleData();
    if( s_xLocaleData.get() )
    {
        try
        {
            ParseResult aResult = m_xCharClass->parsePredefinedToken(KParseType::ANY_NUMBER,_rValue,0,m_pData->aLocale,0,OUString(),KParseType::ANY_NUMBER,OUString());
            if((aResult.TokenType & KParseType::IDENTNAME) && aResult.EndPos == _rValue.getLength())
            {
                aValue = OUString::number(aResult.Value);
                sal_Int32 nPos = aValue.lastIndexOf('.');
                if((nPos+_nScale) < aValue.getLength())
                    aValue = aValue.replaceAt(nPos+_nScale,aValue.getLength()-nPos-_nScale, u"");
                OUString sDecimalSeparator = s_xLocaleData.get()->get()->getLocaleItem(m_pData->aLocale).decimalSeparator;
                aValue = aValue.replaceAt(aValue.lastIndexOf('.'), 1, sDecimalSeparator);
                return aValue;
            }
        }
        catch(Exception&)
        {
        }
    }
    return aValue;
}


std::mutex& OSQLParser::getMutex()
{
    static std::mutex aMutex;
    return aMutex;
}


std::unique_ptr<OSQLParseNode> OSQLParser::predicateTree(OUString& rErrorMessage, const OUString& rStatement,
                                         const Reference< css::util::XNumberFormatter > & xFormatter,
                                         const Reference< XPropertySet > & xField,
                                         bool bUseRealName)
{
    // Guard the parsing
    std::unique_lock aGuard(getMutex());
    // must be reset
    setParser(this);


    // reset the parser
    m_xField        = xField;
    m_xFormatter    = xFormatter;

    if (m_xField.is())
    {
        sal_Int32 nType=0;
        try
        {
            // get the field name
            OUString aString;

            // retrieve the fields name
            // #75243# use the RealName of the column if there is any otherwise the name which could be the alias
            // of the field
            Reference< XPropertySetInfo> xInfo = m_xField->getPropertySetInfo();
            if ( bUseRealName && xInfo->hasPropertyByName(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_REALNAME)))
                m_xField->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_REALNAME)) >>= aString;
            else
                m_xField->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_NAME)) >>= aString;

            m_sFieldName = aString;

            // get the field format key
            if ( xInfo->hasPropertyByName(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_FORMATKEY)))
                m_xField->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_FORMATKEY)) >>= m_nFormatKey;
            else
                m_nFormatKey = 0;

            // get the field type
            m_xField->getPropertyValue(OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_TYPE)) >>= nType;
        }
        catch ( Exception& )
        {
            OSL_ASSERT(false);
        }

        if (m_nFormatKey && m_xFormatter.is())
        {
            Any aValue = getNumberFormatProperty( m_xFormatter, m_nFormatKey, OMetaConnection::getPropMap().getNameByIndex(PROPERTY_ID_LOCALE) );
            OSL_ENSURE(aValue.getValueType() == cppu::UnoType<css::lang::Locale>::get(), "OSQLParser::PredicateTree : invalid language property !");

            if (aValue.getValueType() == cppu::UnoType<css::lang::Locale>::get())
                aValue >>= m_pData->aLocale;
        }
        else
            m_pData->aLocale = m_pContext->getPreferredLocale();

        if ( m_xFormatter.is() )
        {
            try
            {
                Reference< css::util::XNumberFormatsSupplier >  xFormatSup = m_xFormatter->getNumberFormatsSupplier();
                if ( xFormatSup.is() )
                {
                    Reference< css::util::XNumberFormats >  xFormats = xFormatSup->getNumberFormats();
                    if ( xFormats.is() )
                    {
                        css::lang::Locale aLocale;
                        aLocale.Language = "en";
                        aLocale.Country = "US";
                        OUString sFormat(u"YYYY-MM-DD"_ustr);
                        m_nDateFormatKey = xFormats->queryKey(sFormat,aLocale,false);
                        if ( m_nDateFormatKey == sal_Int32(-1) )
                            m_nDateFormatKey = xFormats->addNew(sFormat, aLocale);
                    }
                }
            }
            catch ( Exception& )
            {
                SAL_WARN( "connectivity.parse","DateFormatKey");
            }
        }

        switch (nType)
        {
            case DataType::DATE:
            case DataType::TIME:
            case DataType::TIMESTAMP:
                s_pScanner->SetRule(OSQLScanner::GetDATERule());
                break;
            case DataType::CHAR:
            case DataType::VARCHAR:
            case DataType::LONGVARCHAR:
            case DataType::CLOB:
                s_pScanner->SetRule(OSQLScanner::GetSTRINGRule());
                break;
            default:
            {
                auto& s_xLocaleData = getLocaleData();
                if ( s_xLocaleData.get()->get()->getLocaleItem( m_pData->aLocale ).decimalSeparator.toChar() == ',' )
                    s_pScanner->SetRule(OSQLScanner::GetGERRule());
                else
                    s_pScanner->SetRule(OSQLScanner::GetENGRule());
            }
        }

    }
    else
        s_pScanner->SetRule(OSQLScanner::GetSQLRule());

    s_pScanner->prepareScan(rStatement, m_pContext, true);

    SQLyylval.pParseNode = nullptr;
    //  SQLyypvt = NULL;
    m_pParseTree = nullptr;
    m_sErrorMessage.clear();

    // Start the parser
    if (SQLyyparse() != 0)
    {
        m_sFieldName.clear();
        m_xField.clear();
        m_xFormatter.clear();
        m_nFormatKey = 0;
        m_nDateFormatKey = 0;

        if (m_sErrorMessage.isEmpty())
            m_sErrorMessage = s_pScanner->getErrorMessage();
        if (m_sErrorMessage.isEmpty())
            m_sErrorMessage = m_pContext->getErrorMessage(IParseContext::ErrorCode::General);

        rErrorMessage = m_sErrorMessage;

        // clear the garbage collector
        (*s_pGarbageCollector)->clearAndDelete();
        // coverity[leaked_storage : FALSE] - because the garbage collector deleted it
        m_pParseTree.release();
        return nullptr;
    }
    else
    {
        (*s_pGarbageCollector)->clear();

        m_sFieldName.clear();
        m_xField.clear();
        m_xFormatter.clear();
        m_nFormatKey = 0;
        m_nDateFormatKey = 0;

        // Return the result (the root parse node):

        // Instead, the parse method sets the member pParseTree and simply returns that
        OSL_ENSURE(m_pParseTree != nullptr,"OSQLParser: Parser did not return a ParseTree!");
        return std::move(m_pParseTree);
    }
}


OSQLParser::OSQLParser(css::uno::Reference< css::uno::XComponentContext > xContext,
                       const IParseContext* _pContext,
                       const IParseContext* _pNeutral)
    :m_pContext(_pContext)
    ,m_pNeutral(_pNeutral)
    ,m_pData( new OSQLParser_Data )
    ,m_nFormatKey(0)
    ,m_nDateFormatKey(0)
    ,m_xContext(std::move(xContext))
{


    setParser(this);

#ifdef SQLYYDEBUG
#ifdef SQLYYDEBUG_ON
    SQLyydebug = 1;
#endif
#endif

    std::unique_lock aGuard(getMutex());
    // Do we have to initialize the data?
    if (s_nRefCount == 0)
    {
        s_pScanner = new OSQLScanner();
        s_pScanner->setScanner();
        s_pGarbageCollector = new OSQLParseNodesGarbageCollector();

        auto& s_xLocaleData = getLocaleData();
        if(!s_xLocaleData.get())
            s_xLocaleData.set(LocaleData::create(m_xContext));

        // reset to UNKNOWN_RULE
        static_assert(OSQLParseNode::UNKNOWN_RULE==0, "UNKNOWN_RULE must be 0 for memset to 0 to work");
        memset(OSQLParser::s_nRuleIDs,0,sizeof(OSQLParser::s_nRuleIDs));

        const struct
        {
            OSQLParseNode::Rule eRule;      // the parse node's ID for the rule
            OString      sRuleName;  // the name of the rule ("select_statement")
        }   aRuleDescriptions[] =
        {
            { OSQLParseNode::select_statement, "select_statement"_ostr },
            { OSQLParseNode::table_exp, "table_exp"_ostr },
            { OSQLParseNode::table_ref_commalist, "table_ref_commalist"_ostr },
            { OSQLParseNode::table_ref, "table_ref"_ostr },
            { OSQLParseNode::catalog_name, "catalog_name"_ostr },
            { OSQLParseNode::schema_name, "schema_name"_ostr },
            { OSQLParseNode::table_name, "table_name"_ostr },
            { OSQLParseNode::opt_column_commalist, "opt_column_commalist"_ostr },
            { OSQLParseNode::column_commalist, "column_commalist"_ostr },
            { OSQLParseNode::column_ref_commalist, "column_ref_commalist"_ostr },
            { OSQLParseNode::column_ref, "column_ref"_ostr },
            { OSQLParseNode::opt_order_by_clause, "opt_order_by_clause"_ostr },
            { OSQLParseNode::ordering_spec_commalist, "ordering_spec_commalist"_ostr },
            { OSQLParseNode::ordering_spec, "ordering_spec"_ostr },
            { OSQLParseNode::opt_asc_desc, "opt_asc_desc"_ostr },
            { OSQLParseNode::where_clause, "where_clause"_ostr },
            { OSQLParseNode::opt_where_clause, "opt_where_clause"_ostr },
            { OSQLParseNode::search_condition, "search_condition"_ostr },
            { OSQLParseNode::comparison, "comparison"_ostr },
            { OSQLParseNode::comparison_predicate, "comparison_predicate"_ostr },
            { OSQLParseNode::between_predicate, "between_predicate"_ostr },
            { OSQLParseNode::like_predicate, "like_predicate"_ostr },
            { OSQLParseNode::opt_escape, "opt_escape"_ostr },
            { OSQLParseNode::test_for_null, "test_for_null"_ostr },
            { OSQLParseNode::scalar_exp_commalist, "scalar_exp_commalist"_ostr },
            { OSQLParseNode::scalar_exp, "scalar_exp"_ostr },
            { OSQLParseNode::parameter_ref, "parameter_ref"_ostr },
            { OSQLParseNode::parameter, "parameter"_ostr },
            { OSQLParseNode::general_set_fct, "general_set_fct"_ostr },
            { OSQLParseNode::range_variable, "range_variable"_ostr },
            { OSQLParseNode::column, "column"_ostr },
            { OSQLParseNode::delete_statement_positioned, "delete_statement_positioned"_ostr },
            { OSQLParseNode::delete_statement_searched, "delete_statement_searched"_ostr },
            { OSQLParseNode::update_statement_positioned, "update_statement_positioned"_ostr },
            { OSQLParseNode::update_statement_searched, "update_statement_searched"_ostr },
            { OSQLParseNode::assignment_commalist, "assignment_commalist"_ostr },
            { OSQLParseNode::assignment, "assignment"_ostr },
            { OSQLParseNode::values_or_query_spec, "values_or_query_spec"_ostr },
            { OSQLParseNode::insert_statement, "insert_statement"_ostr },
            { OSQLParseNode::insert_atom_commalist, "insert_atom_commalist"_ostr },
            { OSQLParseNode::insert_atom, "insert_atom"_ostr },
            { OSQLParseNode::from_clause, "from_clause"_ostr },
            { OSQLParseNode::qualified_join, "qualified_join"_ostr },
            { OSQLParseNode::cross_union, "cross_union"_ostr },
            { OSQLParseNode::select_sublist, "select_sublist"_ostr },
            { OSQLParseNode::derived_column, "derived_column"_ostr },
            { OSQLParseNode::column_val, "column_val"_ostr },
            { OSQLParseNode::set_fct_spec, "set_fct_spec"_ostr },
            { OSQLParseNode::boolean_term, "boolean_term"_ostr },
            { OSQLParseNode::boolean_primary, "boolean_primary"_ostr },
            { OSQLParseNode::num_value_exp, "num_value_exp"_ostr },
            { OSQLParseNode::join_type, "join_type"_ostr },
            { OSQLParseNode::position_exp, "position_exp"_ostr },
            { OSQLParseNode::extract_exp, "extract_exp"_ostr },
            { OSQLParseNode::length_exp, "length_exp"_ostr },
            { OSQLParseNode::char_value_fct, "char_value_fct"_ostr },
            { OSQLParseNode::odbc_call_spec, "odbc_call_spec"_ostr },
            { OSQLParseNode::in_predicate, "in_predicate"_ostr },
            { OSQLParseNode::existence_test, "existence_test"_ostr },
            { OSQLParseNode::unique_test, "unique_test"_ostr },
            { OSQLParseNode::all_or_any_predicate, "all_or_any_predicate"_ostr },
            { OSQLParseNode::named_columns_join, "named_columns_join"_ostr },
            { OSQLParseNode::join_condition, "join_condition"_ostr },
            { OSQLParseNode::joined_table, "joined_table"_ostr },
            { OSQLParseNode::boolean_factor, "boolean_factor"_ostr },
            { OSQLParseNode::sql_not, "sql_not"_ostr },
            { OSQLParseNode::manipulative_statement, "manipulative_statement"_ostr },
            { OSQLParseNode::subquery, "subquery"_ostr },
            { OSQLParseNode::value_exp_commalist, "value_exp_commalist"_ostr },
            { OSQLParseNode::odbc_fct_spec, "odbc_fct_spec"_ostr },
            { OSQLParseNode::union_statement, "union_statement"_ostr },
            { OSQLParseNode::outer_join_type, "outer_join_type"_ostr },
            { OSQLParseNode::char_value_exp, "char_value_exp"_ostr },
            { OSQLParseNode::term, "term"_ostr },
            { OSQLParseNode::value_exp_primary, "value_exp_primary"_ostr },
            { OSQLParseNode::value_exp, "value_exp"_ostr },
            { OSQLParseNode::selection, "selection"_ostr },
            { OSQLParseNode::fold, "fold"_ostr },
            { OSQLParseNode::char_substring_fct, "char_substring_fct"_ostr },
            { OSQLParseNode::factor, "factor"_ostr },
            { OSQLParseNode::base_table_def, "base_table_def"_ostr },
            { OSQLParseNode::base_table_element_commalist, "base_table_element_commalist"_ostr },
            { OSQLParseNode::data_type, "data_type"_ostr },
            { OSQLParseNode::column_def, "column_def"_ostr },
            { OSQLParseNode::table_node, "table_node"_ostr },
            { OSQLParseNode::as_clause, "as_clause"_ostr },
            { OSQLParseNode::opt_as, "opt_as"_ostr },
            { OSQLParseNode::op_column_commalist, "op_column_commalist"_ostr },
            { OSQLParseNode::table_primary_as_range_column, "table_primary_as_range_column"_ostr },
            { OSQLParseNode::datetime_primary, "datetime_primary"_ostr },
            { OSQLParseNode::concatenation, "concatenation"_ostr },
            { OSQLParseNode::char_factor, "char_factor"_ostr },
            { OSQLParseNode::bit_value_fct, "bit_value_fct"_ostr },
            { OSQLParseNode::comparison_predicate_part_2, "comparison_predicate_part_2"_ostr },
            { OSQLParseNode::parenthesized_boolean_value_expression, "parenthesized_boolean_value_expression"_ostr },
            { OSQLParseNode::character_string_type, "character_string_type"_ostr },
            { OSQLParseNode::other_like_predicate_part_2, "other_like_predicate_part_2"_ostr },
            { OSQLParseNode::between_predicate_part_2, "between_predicate_part_2"_ostr },
            { OSQLParseNode::null_predicate_part_2, "null_predicate_part_2"_ostr },
            { OSQLParseNode::cast_spec, "cast_spec"_ostr },
            { OSQLParseNode::window_function, "window_function"_ostr }
        };
        const size_t nRuleMapCount = std::size( aRuleDescriptions );
        // added a new rule? Adjust this map!
        // +1 for UNKNOWN_RULE
        static_assert(nRuleMapCount + 1 == static_cast<size_t>(OSQLParseNode::rule_count), "must be equal");

        for (const auto & aRuleDescription : aRuleDescriptions)
        {
            // look up the rule description in the our identifier map
            sal_uInt32 nParserRuleID = StrToRuleID( aRuleDescription.sRuleName );
            // map the parser's rule ID to the OSQLParseNode::Rule
            s_aReverseRuleIDLookup[ nParserRuleID ] = aRuleDescription.eRule;
            // and map the OSQLParseNode::Rule to the parser's rule ID
            s_nRuleIDs[ aRuleDescription.eRule ] = nParserRuleID;
        }
    }
    ++s_nRefCount;

    if (m_pContext == nullptr)
        // take the default context
        m_pContext = &s_aDefaultContext;

    m_pData->aLocale = m_pContext->getPreferredLocale();
}

//static
tools::DeleteOnDeinit<css::uno::Reference< css::i18n::XLocaleData4>>& OSQLParser::getLocaleData()
{
    static tools::DeleteOnDeinit<css::uno::Reference< css::i18n::XLocaleData4>> s_xLocaleData(tools::DeleteOnDeinitFlag::Empty);
    return s_xLocaleData;
}

OSQLParser::~OSQLParser()
{
    std::unique_lock aGuard(getMutex());
    OSL_ENSURE(s_nRefCount > 0, "OSQLParser::~OSQLParser() : suspicious call : has a refcount of 0 !");
    if (!--s_nRefCount)
    {
        s_pScanner->setScanner(true);
        delete s_pScanner;
        s_pScanner = nullptr;

        delete s_pGarbageCollector;
        s_pGarbageCollector = nullptr;

        RuleIDMap().swap(s_aReverseRuleIDLookup);
    }
    m_pParseTree = nullptr;
}

void OSQLParseNode::substituteParameterNames(OSQLParseNode const * _pNode)
{
    sal_Int32 nCount = _pNode->count();
    for(sal_Int32 i=0;i < nCount;++i)
    {
        OSQLParseNode* pChildNode = _pNode->getChild(i);
        if(SQL_ISRULE(pChildNode,parameter) && pChildNode->count() > 1)
        {
            OSQLParseNode* pNewNode = new OSQLParseNode("?" ,SQLNodeType::Punctuation,0);
            pChildNode->replaceAndDelete(pChildNode->getChild(0), pNewNode);
            sal_Int32 nChildCount = pChildNode->count();
            for(sal_Int32 j=1;j < nChildCount;++j)
                delete pChildNode->removeAt(1);
        }
        else
            substituteParameterNames(pChildNode);

    }
}

bool OSQLParser::extractDate(OSQLParseNode const * pLiteral,double& _rfValue)
{
    Reference< XNumberFormatsSupplier > xFormatSup = m_xFormatter->getNumberFormatsSupplier();
    Reference< XNumberFormatTypes > xFormatTypes;
    if ( xFormatSup.is() )
        xFormatTypes.set(xFormatSup->getNumberFormats(), css::uno::UNO_QUERY);

    // if there is no format key, yet, make sure we have a feasible one for our locale
    try
    {
        if ( !m_nFormatKey && xFormatTypes.is() )
            m_nFormatKey = ::dbtools::getDefaultNumberFormat( m_xField, xFormatTypes, m_pData->aLocale );
    }
    catch( Exception& ) { }
    const OUString& sValue = pLiteral->getTokenValue();
    sal_Int32 nTryFormat = m_nFormatKey;
    bool bSuccess = lcl_saveConvertToNumber( m_xFormatter, nTryFormat, sValue, _rfValue );

    // If our format key didn't do, try the default date format for our locale.
    if ( !bSuccess && xFormatTypes.is() )
    {
        try
        {
            nTryFormat = xFormatTypes->getStandardFormat( NumberFormat::DATE, m_pData->aLocale );
        }
        catch( Exception& ) { }
        bSuccess = lcl_saveConvertToNumber( m_xFormatter, nTryFormat, sValue, _rfValue );
    }

    // if this also didn't do, try ISO format
    if ( !bSuccess && xFormatTypes.is() )
    {
        try
        {
            nTryFormat = xFormatTypes->getFormatIndex( NumberFormatIndex::DATE_DIN_YYYYMMDD, m_pData->aLocale );
        }
        catch( Exception& ) { }
        bSuccess = lcl_saveConvertToNumber( m_xFormatter, nTryFormat, sValue, _rfValue );
    }

    // if this also didn't do, try fallback date format (en-US)
    if ( !bSuccess )
    {
        nTryFormat = m_nDateFormatKey;
        bSuccess = lcl_saveConvertToNumber( m_xFormatter, nTryFormat, sValue, _rfValue );
    }
    return bSuccess;
}

OSQLParseNode* OSQLParser::buildDate(sal_Int32 _nType,OSQLParseNode*& pLiteral)
{
    // try converting the string into a date, according to our format key
    double fValue = 0.0;
    OSQLParseNode* pFCTNode = nullptr;

    if ( extractDate(pLiteral,fValue) )
        pFCTNode = buildNode_Date( fValue, _nType);

    delete pLiteral;
    pLiteral = nullptr;

    if ( !pFCTNode )
        m_sErrorMessage = m_pContext->getErrorMessage(IParseContext::ErrorCode::InvalidDateCompare);

    return pFCTNode;
}


OSQLParseNode::OSQLParseNode(const char * pNewValue,
                             SQLNodeType eNewNodeType,
                             sal_uInt32 nNewNodeID)
        :m_pParent(nullptr)
        ,m_aNodeValue(pNewValue,strlen(pNewValue),RTL_TEXTENCODING_UTF8)
        ,m_eNodeType(eNewNodeType)
        ,m_nNodeID(nNewNodeID)
{
    OSL_ENSURE(m_eNodeType >= SQLNodeType::Rule && m_eNodeType <= SQLNodeType::Concat,"OSQLParseNode: created with invalid NodeType");
}

OSQLParseNode::OSQLParseNode(std::string_view _rNewValue,
                             SQLNodeType eNewNodeType,
                             sal_uInt32 nNewNodeID)
        :m_pParent(nullptr)
        ,m_aNodeValue(OStringToOUString(_rNewValue,RTL_TEXTENCODING_UTF8))
        ,m_eNodeType(eNewNodeType)
        ,m_nNodeID(nNewNodeID)
{
    OSL_ENSURE(m_eNodeType >= SQLNodeType::Rule && m_eNodeType <= SQLNodeType::Concat,"OSQLParseNode: created with invalid NodeType");
}

OSQLParseNode::OSQLParseNode(OUString _aNewValue,
                                 SQLNodeType eNewNodeType,
                                 sal_uInt32 nNewNodeID)
        :m_pParent(nullptr)
        ,m_aNodeValue(std::move(_aNewValue))
        ,m_eNodeType(eNewNodeType)
        ,m_nNodeID(nNewNodeID)
{
    OSL_ENSURE(m_eNodeType >= SQLNodeType::Rule && m_eNodeType <= SQLNodeType::Concat,"OSQLParseNode: created with invalid NodeType");
}

OSQLParseNode::OSQLParseNode(const OSQLParseNode& rParseNode)
{
    // Set the getParent to NULL
    m_pParent = nullptr;

    // Copy the members
    m_aNodeValue = rParseNode.m_aNodeValue;
    m_eNodeType  = rParseNode.m_eNodeType;
    m_nNodeID    = rParseNode.m_nNodeID;


    // Remember that we derived from Container. According to SV-Help the Container's
    // copy ctor creates a new Container with the same pointers for content.
    // This means after copying the Container, for all non-NULL pointers a copy is
    // created and reattached instead of the old pointer.

    // If not a leaf, then process SubTrees
    for (auto const& child : rParseNode.m_aChildren)
        append(new OSQLParseNode(*child));
}


OSQLParseNode& OSQLParseNode::operator=(const OSQLParseNode& rParseNode)
{
    if (this != &rParseNode)
    {
        // Copy the members - pParent remains the same
        m_aNodeValue = rParseNode.m_aNodeValue;
        m_eNodeType  = rParseNode.m_eNodeType;
        m_nNodeID    = rParseNode.m_nNodeID;

        m_aChildren.clear();

        for (auto const& child : rParseNode.m_aChildren)
            append(new OSQLParseNode(*child));
    }
    return *this;
}


bool OSQLParseNode::operator==(OSQLParseNode const & rParseNode) const
{
    // The members must be equal
    bool bResult = (m_nNodeID  == rParseNode.m_nNodeID) &&
                   (m_eNodeType == rParseNode.m_eNodeType) &&
                   (m_aNodeValue == rParseNode.m_aNodeValue) &&
                    count() == rParseNode.count();

    // Parameters are not equal!
    bResult = bResult && !SQL_ISRULE(this, parameter);

    // compare children
    for (size_t i=0; bResult && i < count(); i++)
        bResult = *getChild(i) == *rParseNode.getChild(i);

    return bResult;
}


OSQLParseNode::~OSQLParseNode()
{
}

void OSQLParseNode::append(OSQLParseNode* pNewNode)
{
    assert(pNewNode != nullptr && "OSQLParseNode: invalid NewSubTree");
    OSL_ENSURE(pNewNode->getParent() == nullptr, "OSQLParseNode: Node is not an orphan");
    OSL_ENSURE(std::none_of(m_aChildren.begin(), m_aChildren.end(),
                   [&] (std::unique_ptr<OSQLParseNode> const & r) { return r.get() == pNewNode; }),
               "OSQLParseNode::append() Node already element of parent");

    // Create connection to getParent
    pNewNode->setParent( this );
    // and attach the SubTree at the end
    m_aChildren.emplace_back(pNewNode);
}

bool OSQLParseNode::addDateValue(OUStringBuffer& rString, const SQLParseNodeParameter& rParam) const
{
    // special display for date/time values
    if (!SQL_ISRULE(this,set_fct_spec) || !SQL_ISPUNCTUATION(m_aChildren[0],"{"))
        return false;

    const OSQLParseNode* pODBCNode = m_aChildren[1].get();
    const OSQLParseNode* pODBCNodeChild = pODBCNode->m_aChildren[0].get();

    if (pODBCNodeChild->getNodeType() != SQLNodeType::Keyword || !(
        SQL_ISTOKEN(pODBCNodeChild, D) ||
        SQL_ISTOKEN(pODBCNodeChild, T) ||
        SQL_ISTOKEN(pODBCNodeChild, TS) ))
        return false;

    OUString suQuote(u"'"_ustr);
    if (rParam.bPredicate)
    {
         if (rParam.aMetaData.shouldEscapeDateTime())
         {
             suQuote = "#";
         }
    }
    else
    {
         if (rParam.aMetaData.shouldEscapeDateTime())
         {
             // suQuote = "'";
             return false;
         }
    }

    if (!rString.isEmpty())
        rString.append(" ");
    rString.append(suQuote);
    const OUString sTokenValue = pODBCNode->m_aChildren[1]->getTokenValue();
    if (SQL_ISTOKEN(pODBCNodeChild, D))
    {
        rString.append(rParam.bPredicate ? convertDateString(rParam, sTokenValue) : sTokenValue);
    }
    else if (SQL_ISTOKEN(pODBCNodeChild, T))
    {
        rString.append(rParam.bPredicate ? convertTimeString(rParam, sTokenValue) : sTokenValue);
    }
    else
    {
        rString.append(rParam.bPredicate ? convertDateTimeString(rParam, sTokenValue) : sTokenValue);
    }
    rString.append(suQuote);
    return true;
}

void OSQLParseNode::replaceNodeValue(const OUString& rTableAlias, const OUString& rColumnName)
{
    for (size_t i=0;i<count();++i)
    {
        if (SQL_ISRULE(this,column_ref) && count() == 1 && getChild(0)->getTokenValue() == rColumnName)
        {
            OSQLParseNode * pCol = removeAt(sal_uInt32(0));
            append(new OSQLParseNode(rTableAlias,SQLNodeType::Name));
            append(new OSQLParseNode(".",SQLNodeType::Punctuation));
            append(pCol);
        }
        else
            getChild(i)->replaceNodeValue(rTableAlias,rColumnName);
    }
}

OSQLParseNode* OSQLParseNode::getByRule(OSQLParseNode::Rule eRule) const
{
    OSQLParseNode* pRetNode = nullptr;
    if (isRule() && OSQLParser::RuleID(eRule) == getRuleID())
        pRetNode = const_cast<OSQLParseNode*>(this);
    else
    {
        for (auto const& child : m_aChildren)
        {
            pRetNode = child->getByRule(eRule);
            if (pRetNode)
                break;
        }
    }
    return pRetNode;
}

static OSQLParseNode* MakeANDNode(OSQLParseNode *pLeftLeaf,OSQLParseNode *pRightLeaf)
{
    OSQLParseNode* pNewNode = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::boolean_term));
    pNewNode->append(pLeftLeaf);
    pNewNode->append(new OSQLParseNode("AND",SQLNodeType::Keyword,SQL_TOKEN_AND));
    pNewNode->append(pRightLeaf);
    return pNewNode;
}

static OSQLParseNode* MakeORNode(OSQLParseNode *pLeftLeaf,OSQLParseNode *pRightLeaf)
{
    OSQLParseNode* pNewNode = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::search_condition));
    pNewNode->append(pLeftLeaf);
    pNewNode->append(new OSQLParseNode("OR",SQLNodeType::Keyword,SQL_TOKEN_OR));
    pNewNode->append(pRightLeaf);
    return pNewNode;
}

void OSQLParseNode::disjunctiveNormalForm(OSQLParseNode*& pSearchCondition)
{
    if(!pSearchCondition) // no where condition at entry point
        return;

    OSQLParseNode::absorptions(pSearchCondition);
    // '(' search_condition ')'
    if (SQL_ISRULE(pSearchCondition,boolean_primary))
    {
        OSQLParseNode* pLeft    = pSearchCondition->getChild(1);
        disjunctiveNormalForm(pLeft);
    }
    // search_condition SQL_TOKEN_OR boolean_term
    else if (SQL_ISRULE(pSearchCondition,search_condition))
    {
        OSQLParseNode* pLeft    = pSearchCondition->getChild(0);
        disjunctiveNormalForm(pLeft);

        OSQLParseNode* pRight = pSearchCondition->getChild(2);
        disjunctiveNormalForm(pRight);
    }
    // boolean_term SQL_TOKEN_AND boolean_factor
    else if (SQL_ISRULE(pSearchCondition,boolean_term))
    {
        OSQLParseNode* pLeft    = pSearchCondition->getChild(0);
        disjunctiveNormalForm(pLeft);

        OSQLParseNode* pRight = pSearchCondition->getChild(2);
        disjunctiveNormalForm(pRight);

        OSQLParseNode* pNewNode = nullptr;
        // '(' search_condition ')' on left side
        if(pLeft->count() == 3 && SQL_ISRULE(pLeft,boolean_primary) && SQL_ISRULE(pLeft->getChild(1),search_condition))
        {
            // and-or tree  on left side
            OSQLParseNode* pOr = pLeft->getChild(1);
            OSQLParseNode* pNewLeft = nullptr;
            OSQLParseNode* pNewRight = nullptr;

            // cut right from parent
            OSQLParseNode* pOldRight = pSearchCondition->removeAt(2);
            assert(pOldRight == pRight);

            pNewRight   = MakeANDNode(pOr->removeAt(2), pOldRight);
            pNewLeft    = MakeANDNode(pOr->removeAt(sal_uInt32(0)), new OSQLParseNode(*pOldRight));
            pNewNode    = MakeORNode(pNewLeft,pNewRight);
            // and append new Node
            replaceAndReset(pSearchCondition,pNewNode);

            disjunctiveNormalForm(pSearchCondition);
        }
        else if(pRight->count() == 3 && SQL_ISRULE(pRight,boolean_primary) && SQL_ISRULE(pRight->getChild(1),search_condition))
        {   // '(' search_condition ')' on right side
            // and-or tree  on right side
            // a and (b or c)
            OSQLParseNode* pOr = pRight->getChild(1);
            OSQLParseNode* pNewLeft = nullptr;
            OSQLParseNode* pNewRight = nullptr;

            // cut left from parent
            OSQLParseNode* pOldLeft = pSearchCondition->removeAt(sal_uInt32(0));
            assert(pOldLeft == pLeft);

            pNewRight   = MakeANDNode(pOldLeft, pOr->removeAt(2));
            pNewLeft    = MakeANDNode(new OSQLParseNode(*pOldLeft), pOr->removeAt(sal_uInt32(0)));
            pNewNode    = MakeORNode(pNewLeft,pNewRight);

            // and append new Node
            replaceAndReset(pSearchCondition,pNewNode);
            disjunctiveNormalForm(pSearchCondition);
        }
        else if(SQL_ISRULE(pLeft,boolean_primary) && (!SQL_ISRULE(pLeft->getChild(1),search_condition) || !SQL_ISRULE(pLeft->getChild(1),boolean_term)))
            pSearchCondition->replaceAndDelete(pLeft, pLeft->removeAt(1));
        else if(SQL_ISRULE(pRight,boolean_primary) && (!SQL_ISRULE(pRight->getChild(1),search_condition) || !SQL_ISRULE(pRight->getChild(1),boolean_term)))
            pSearchCondition->replaceAndDelete(pRight, pRight->removeAt(1));
    }
}

void OSQLParseNode::negateSearchCondition(OSQLParseNode*& pSearchCondition, bool bNegate)
{
    if(!pSearchCondition) // no where condition at entry point
        return;
    // '(' search_condition ')'
    if (pSearchCondition->count() == 3 && SQL_ISRULE(pSearchCondition,boolean_primary))
    {
        OSQLParseNode* pRight = pSearchCondition->getChild(1);
        negateSearchCondition(pRight,bNegate);
    }
    // search_condition SQL_TOKEN_OR boolean_term
    else if (SQL_ISRULE(pSearchCondition,search_condition))
    {
        OSQLParseNode* pLeft    = pSearchCondition->getChild(0);
        OSQLParseNode* pRight = pSearchCondition->getChild(2);
        if(bNegate)
        {
            OSQLParseNode* pNewNode = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::boolean_term));
            pNewNode->append(pSearchCondition->removeAt(sal_uInt32(0)));
            pNewNode->append(new OSQLParseNode("AND",SQLNodeType::Keyword,SQL_TOKEN_AND));
            pNewNode->append(pSearchCondition->removeAt(sal_uInt32(1)));
            replaceAndReset(pSearchCondition,pNewNode);

            pLeft   = pNewNode->getChild(0);
            pRight  = pNewNode->getChild(2);
        }

        negateSearchCondition(pLeft,bNegate);
        negateSearchCondition(pRight,bNegate);
    }
    // boolean_term SQL_TOKEN_AND boolean_factor
    else if (SQL_ISRULE(pSearchCondition,boolean_term))
    {
        OSQLParseNode* pLeft    = pSearchCondition->getChild(0);
        OSQLParseNode* pRight = pSearchCondition->getChild(2);
        if(bNegate)
        {
            OSQLParseNode* pNewNode = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::search_condition));
            pNewNode->append(pSearchCondition->removeAt(sal_uInt32(0)));
            pNewNode->append(new OSQLParseNode("OR",SQLNodeType::Keyword,SQL_TOKEN_OR));
            pNewNode->append(pSearchCondition->removeAt(sal_uInt32(1)));
            replaceAndReset(pSearchCondition,pNewNode);

            pLeft   = pNewNode->getChild(0);
            pRight  = pNewNode->getChild(2);
        }

        negateSearchCondition(pLeft,bNegate);
        negateSearchCondition(pRight,bNegate);
    }
    // SQL_TOKEN_NOT ( boolean_primary )
    else if (SQL_ISRULE(pSearchCondition,boolean_factor))
    {
        OSQLParseNode *pNot = pSearchCondition->removeAt(sal_uInt32(0));
        delete pNot;
        OSQLParseNode *pBooleanTest = pSearchCondition->removeAt(sal_uInt32(0));
        // TODO is this needed // pBooleanTest->setParent(NULL);
        replaceAndReset(pSearchCondition,pBooleanTest);

        if (!bNegate)
            negateSearchCondition(pSearchCondition, true); // negate all deeper values
    }
    // row_value_constructor comparison row_value_constructor
    // row_value_constructor comparison any_all_some subquery
    else if(bNegate && (SQL_ISRULE(pSearchCondition,comparison_predicate) || SQL_ISRULE(pSearchCondition,all_or_any_predicate)))
    {
        assert(pSearchCondition->count() == 3);
        OSQLParseNode* pComparison = pSearchCondition->getChild(1);
        if(SQL_ISRULE(pComparison, comparison))
        {
            assert(pComparison->count() == 2 ||
                   pComparison->count() == 4);
            assert(SQL_ISTOKEN(pComparison->getChild(0), IS));

            OSQLParseNode* pNot = pComparison->getChild(1);
            OSQLParseNode* pNotNot = nullptr;
            if(pNot->isRule()) // no NOT token (empty rule)
                pNotNot = new OSQLParseNode("NOT",SQLNodeType::Keyword,SQL_TOKEN_NOT);
            else
            {
                assert(SQL_ISTOKEN(pNot,NOT));
                pNotNot = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::sql_not));
            }
            pComparison->replaceAndDelete(pNot, pNotNot);
        }
        else
        {
            OSQLParseNode* pNewComparison;
            switch(pComparison->getNodeType())
            {
            default:
            case SQLNodeType::Equal:
                assert(pComparison->getNodeType() == SQLNodeType::Equal &&
                       "OSQLParseNode::negateSearchCondition: unexpected node type!");
                pNewComparison = new OSQLParseNode("<>",SQLNodeType::NotEqual,SQL_NOTEQUAL);
                break;
            case SQLNodeType::Less:
                pNewComparison = new OSQLParseNode(">=",SQLNodeType::GreatEq,SQL_GREATEQ);
                break;
            case SQLNodeType::Great:
                pNewComparison = new OSQLParseNode("<=",SQLNodeType::LessEq,SQL_LESSEQ);
                break;
            case SQLNodeType::LessEq:
                pNewComparison = new OSQLParseNode(">",SQLNodeType::Great,SQL_GREAT);
                break;
            case SQLNodeType::GreatEq:
                pNewComparison = new OSQLParseNode("<",SQLNodeType::Less,SQL_LESS);
                break;
            case SQLNodeType::NotEqual:
                pNewComparison = new OSQLParseNode("=",SQLNodeType::Equal,SQL_EQUAL);
                break;
            }
            pSearchCondition->replaceAndDelete(pComparison, pNewComparison);
        }
    }

    else if(bNegate && (SQL_ISRULE(pSearchCondition,test_for_null) ||
                        SQL_ISRULE(pSearchCondition,in_predicate)  ||
                        SQL_ISRULE(pSearchCondition,between_predicate) ))
    {
        OSQLParseNode* pPart2 = pSearchCondition->getChild(1);
        sal_uInt32 nNotPos = 0;
        if  ( SQL_ISRULE( pSearchCondition, test_for_null ) )
            nNotPos = 1;

        OSQLParseNode* pNot = pPart2->getChild(nNotPos);
        OSQLParseNode* pNotNot = nullptr;
        if(pNot->isRule()) // no NOT token (empty rule)
            pNotNot = new OSQLParseNode("NOT",SQLNodeType::Keyword,SQL_TOKEN_NOT);
        else
        {
            assert(SQL_ISTOKEN(pNot,NOT));
            pNotNot = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::sql_not));
        }
        pPart2->replaceAndDelete(pNot, pNotNot);
    }
    else if(bNegate && SQL_ISRULE(pSearchCondition,like_predicate))
    {
        OSQLParseNode* pNot = pSearchCondition->getChild( 1 )->getChild( 0 );
        OSQLParseNode* pNotNot = nullptr;
        if(pNot->isRule())
            pNotNot = new OSQLParseNode("NOT",SQLNodeType::Keyword,SQL_TOKEN_NOT);
        else
            pNotNot = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::sql_not));
        pSearchCondition->getChild( 1 )->replaceAndDelete(pNot, pNotNot);
    }
}

void OSQLParseNode::eraseBraces(OSQLParseNode*& pSearchCondition)
{
    if (!(pSearchCondition && (SQL_ISRULE(pSearchCondition,boolean_primary) || (pSearchCondition->count() == 3 && SQL_ISPUNCTUATION(pSearchCondition->getChild(0),"(") &&
         SQL_ISPUNCTUATION(pSearchCondition->getChild(2),")")))))
        return;

    OSQLParseNode* pRight = pSearchCondition->getChild(1);
    absorptions(pRight);
    // if child is not an or and tree then delete () around child
    if(!(SQL_ISRULE(pSearchCondition->getChild(1),boolean_term) || SQL_ISRULE(pSearchCondition->getChild(1),search_condition)) ||
        SQL_ISRULE(pSearchCondition->getChild(1),boolean_term) || // and can always stand without ()
        (SQL_ISRULE(pSearchCondition->getChild(1),search_condition) && SQL_ISRULE(pSearchCondition->getParent(),search_condition)))
    {
        OSQLParseNode* pNode = pSearchCondition->removeAt(1);
        replaceAndReset(pSearchCondition,pNode);
    }
}

void OSQLParseNode::absorptions(OSQLParseNode*& pSearchCondition)
{
    if(!pSearchCondition) // no where condition at entry point
        return;

    eraseBraces(pSearchCondition);

    if(SQL_ISRULE(pSearchCondition,boolean_term) || SQL_ISRULE(pSearchCondition,search_condition))
    {
        OSQLParseNode* pLeft = pSearchCondition->getChild(0);
        absorptions(pLeft);
        OSQLParseNode* pRight = pSearchCondition->getChild(2);
        absorptions(pRight);
    }

    sal_uInt32 nPos = 0;
    // a and a || a or a
    OSQLParseNode* pNewNode = nullptr;
    if(( SQL_ISRULE(pSearchCondition,boolean_term) || SQL_ISRULE(pSearchCondition,search_condition))
        && *pSearchCondition->getChild(0) == *pSearchCondition->getChild(2))
    {
        pNewNode = pSearchCondition->removeAt(sal_uInt32(0));
        replaceAndReset(pSearchCondition,pNewNode);
    }
    // ( a or b ) and a || ( b or c ) and a
    // a and ( a or b ) || a and ( b or c )
    else if (   SQL_ISRULE(pSearchCondition,boolean_term)
            &&  (
                    (       SQL_ISRULE(pSearchCondition->getChild(nPos = 0),boolean_primary)
                        ||  SQL_ISRULE(pSearchCondition->getChild(nPos),search_condition)
                    )
                ||  (       SQL_ISRULE(pSearchCondition->getChild(nPos = 2),boolean_primary)
                        ||  SQL_ISRULE(pSearchCondition->getChild(nPos),search_condition)
                    )
                )
            )
    {
        OSQLParseNode* p2ndSearch = pSearchCondition->getChild(nPos);
        if ( SQL_ISRULE(p2ndSearch,boolean_primary) )
            p2ndSearch = p2ndSearch->getChild(1);

        if ( *p2ndSearch->getChild(0) == *pSearchCondition->getChild(2-nPos) ) // a and ( a or b) -> a or b
        {
            pNewNode = pSearchCondition->removeAt(sal_uInt32(0));
            replaceAndReset(pSearchCondition,pNewNode);

        }
        else if ( *p2ndSearch->getChild(2) == *pSearchCondition->getChild(2-nPos) ) // a and ( b or a) -> a or b
        {
            pNewNode = pSearchCondition->removeAt(sal_uInt32(2));
            replaceAndReset(pSearchCondition,pNewNode);
        }
        else if ( p2ndSearch->getByRule(OSQLParseNode::search_condition) )
        {
            // a and ( b or c ) -> ( a and b ) or ( a and c )
            // ( b or c ) and a -> ( a and b ) or ( a and c )
            OSQLParseNode* pC = p2ndSearch->removeAt(sal_uInt32(2));
            OSQLParseNode* pB = p2ndSearch->removeAt(sal_uInt32(0));
            OSQLParseNode* pA = pSearchCondition->removeAt(sal_uInt32(2)-nPos);

            OSQLParseNode* p1stAnd = MakeANDNode(pA,pB);
            OSQLParseNode* p2ndAnd = MakeANDNode(new OSQLParseNode(*pA),pC);
            pNewNode = MakeORNode(p1stAnd,p2ndAnd);
            OSQLParseNode* pNode = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::boolean_primary));
            pNode->append(new OSQLParseNode("(",SQLNodeType::Punctuation));
            pNode->append(pNewNode);
            pNode->append(new OSQLParseNode(")",SQLNodeType::Punctuation));
            OSQLParseNode::eraseBraces(p1stAnd);
            OSQLParseNode::eraseBraces(p2ndAnd);
            replaceAndReset(pSearchCondition,pNode);
        }
    }
    // a or a and b || a or b and a
    else if(SQL_ISRULE(pSearchCondition,search_condition) && SQL_ISRULE(pSearchCondition->getChild(2),boolean_term))
    {
        if(*pSearchCondition->getChild(2)->getChild(0) == *pSearchCondition->getChild(0))
        {
            pNewNode = pSearchCondition->removeAt(sal_uInt32(0));
            replaceAndReset(pSearchCondition,pNewNode);
        }
        else if(*pSearchCondition->getChild(2)->getChild(2) == *pSearchCondition->getChild(0))
        {
            pNewNode = pSearchCondition->removeAt(sal_uInt32(0));
            replaceAndReset(pSearchCondition,pNewNode);
        }
    }
    // a and b or a || b and a or a
    else if(SQL_ISRULE(pSearchCondition,search_condition) && SQL_ISRULE(pSearchCondition->getChild(0),boolean_term))
    {
        if(*pSearchCondition->getChild(0)->getChild(0) == *pSearchCondition->getChild(2))
        {
            pNewNode = pSearchCondition->removeAt(sal_uInt32(2));
            replaceAndReset(pSearchCondition,pNewNode);
        }
        else if(*pSearchCondition->getChild(0)->getChild(2) == *pSearchCondition->getChild(2))
        {
            pNewNode = pSearchCondition->removeAt(sal_uInt32(2));
            replaceAndReset(pSearchCondition,pNewNode);
        }
    }
    eraseBraces(pSearchCondition);
}

void OSQLParseNode::compress(OSQLParseNode *&pSearchCondition)
{
    if(!pSearchCondition) // no WHERE condition at entry point
        return;

    OSQLParseNode::eraseBraces(pSearchCondition);

    if(SQL_ISRULE(pSearchCondition,boolean_term) || SQL_ISRULE(pSearchCondition,search_condition))
    {
        OSQLParseNode* pLeft = pSearchCondition->getChild(0);
        compress(pLeft);

        OSQLParseNode* pRight = pSearchCondition->getChild(2);
        compress(pRight);
    }
    else if( SQL_ISRULE(pSearchCondition,boolean_primary) || (pSearchCondition->count() == 3 && SQL_ISPUNCTUATION(pSearchCondition->getChild(0),"(") &&
             SQL_ISPUNCTUATION(pSearchCondition->getChild(2),")")))
    {
        OSQLParseNode* pRight = pSearchCondition->getChild(1);
        compress(pRight);
        // if child is not an or and tree then delete () around child
        if(!(SQL_ISRULE(pSearchCondition->getChild(1),boolean_term) || SQL_ISRULE(pSearchCondition->getChild(1),search_condition)) ||
            (SQL_ISRULE(pSearchCondition->getChild(1),boolean_term) && SQL_ISRULE(pSearchCondition->getParent(),boolean_term)) ||
            (SQL_ISRULE(pSearchCondition->getChild(1),search_condition) && SQL_ISRULE(pSearchCondition->getParent(),search_condition)))
        {
            OSQLParseNode* pNode = pSearchCondition->removeAt(1);
            replaceAndReset(pSearchCondition,pNode);
        }
    }

    // or with two and trees where one element of the and trees are equal
    if(!(SQL_ISRULE(pSearchCondition,search_condition) && SQL_ISRULE(pSearchCondition->getChild(0),boolean_term) && SQL_ISRULE(pSearchCondition->getChild(2),boolean_term)))
        return;

    if(*pSearchCondition->getChild(0)->getChild(0) == *pSearchCondition->getChild(2)->getChild(0))
    {
        OSQLParseNode* pLeft    = pSearchCondition->getChild(0)->removeAt(2);
        OSQLParseNode* pRight = pSearchCondition->getChild(2)->removeAt(2);
        OSQLParseNode* pNode    = MakeORNode(pLeft,pRight);

        OSQLParseNode* pNewRule = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::boolean_primary));
        pNewRule->append(new OSQLParseNode("(",SQLNodeType::Punctuation));
        pNewRule->append(pNode);
        pNewRule->append(new OSQLParseNode(")",SQLNodeType::Punctuation));

        OSQLParseNode::eraseBraces(pLeft);
        OSQLParseNode::eraseBraces(pRight);

        pNode = MakeANDNode(pSearchCondition->getChild(0)->removeAt(sal_uInt32(0)),pNewRule);
        replaceAndReset(pSearchCondition,pNode);
    }
    else if(*pSearchCondition->getChild(0)->getChild(2) == *pSearchCondition->getChild(2)->getChild(0))
    {
        OSQLParseNode* pLeft = pSearchCondition->getChild(0)->removeAt(sal_uInt32(0));
        OSQLParseNode* pRight = pSearchCondition->getChild(2)->removeAt(2);
        OSQLParseNode* pNode = MakeORNode(pLeft,pRight);

        OSQLParseNode* pNewRule = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::boolean_primary));
        pNewRule->append(new OSQLParseNode("(",SQLNodeType::Punctuation));
        pNewRule->append(pNode);
        pNewRule->append(new OSQLParseNode(")",SQLNodeType::Punctuation));

        OSQLParseNode::eraseBraces(pLeft);
        OSQLParseNode::eraseBraces(pRight);

        pNode = MakeANDNode(pSearchCondition->getChild(0)->removeAt(1),pNewRule);
        replaceAndReset(pSearchCondition,pNode);
    }
    else if(*pSearchCondition->getChild(0)->getChild(0) == *pSearchCondition->getChild(2)->getChild(2))
    {
        OSQLParseNode* pLeft    = pSearchCondition->getChild(0)->removeAt(2);
        OSQLParseNode* pRight = pSearchCondition->getChild(2)->removeAt(sal_uInt32(0));
        OSQLParseNode* pNode    = MakeORNode(pLeft,pRight);

        OSQLParseNode* pNewRule = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::boolean_primary));
        pNewRule->append(new OSQLParseNode("(",SQLNodeType::Punctuation));
        pNewRule->append(pNode);
        pNewRule->append(new OSQLParseNode(")",SQLNodeType::Punctuation));

        OSQLParseNode::eraseBraces(pLeft);
        OSQLParseNode::eraseBraces(pRight);

        pNode = MakeANDNode(pSearchCondition->getChild(0)->removeAt(sal_uInt32(0)),pNewRule);
        replaceAndReset(pSearchCondition,pNode);
    }
    else if(*pSearchCondition->getChild(0)->getChild(2) == *pSearchCondition->getChild(2)->getChild(2))
    {
        OSQLParseNode* pLeft    = pSearchCondition->getChild(0)->removeAt(sal_uInt32(0));
        OSQLParseNode* pRight = pSearchCondition->getChild(2)->removeAt(sal_uInt32(0));
        OSQLParseNode* pNode    = MakeORNode(pLeft,pRight);

        OSQLParseNode* pNewRule = new OSQLParseNode(OUString(),SQLNodeType::Rule,OSQLParser::RuleID(OSQLParseNode::boolean_primary));
        pNewRule->append(new OSQLParseNode("(",SQLNodeType::Punctuation));
        pNewRule->append(pNode);
        pNewRule->append(new OSQLParseNode(")",SQLNodeType::Punctuation));

        OSQLParseNode::eraseBraces(pLeft);
        OSQLParseNode::eraseBraces(pRight);

        pNode = MakeANDNode(pSearchCondition->getChild(0)->removeAt(1),pNewRule);
        replaceAndReset(pSearchCondition,pNode);
    }
}
#if OSL_DEBUG_LEVEL > 1

void OSQLParseNode::showParseTree( OUString& rString ) const
{
    OUStringBuffer aBuf;
    showParseTree( aBuf, 0 );
    rString = aBuf.makeStringAndClear();
}


void OSQLParseNode::showParseTree( OUStringBuffer& _inout_rBuffer, sal_uInt32 nLevel ) const
{
    for ( sal_uInt32 j=0; j<nLevel; ++j)
        _inout_rBuffer.appendAscii( "  " );

    if ( !isToken() )
    {
        // Rule name as rule
        _inout_rBuffer.appendAscii( "RULE_ID: " );
        _inout_rBuffer.append( (sal_Int32)getRuleID() );
        _inout_rBuffer.append( '(' );
        _inout_rBuffer.append( OSQLParser::RuleIDToStr( getRuleID() ) );
        _inout_rBuffer.append( ')' );
        _inout_rBuffer.append( '\n' );

        // Get the first sub tree
        for (auto const& child : m_aChildren)
            child->showParseTree( _inout_rBuffer, nLevel+1 );
    }
    else
    {
        // Found a token
        switch (m_eNodeType)
        {

        case SQLNodeType::Keyword:
            _inout_rBuffer.appendAscii( "SQL_KEYWORD: " );
            _inout_rBuffer.append( OStringToOUString( OSQLParser::TokenIDToStr( getTokenID() ), RTL_TEXTENCODING_UTF8 ) );
            _inout_rBuffer.append( '\n' );
            break;

        case SQLNodeType::Name:
            _inout_rBuffer.appendAscii( "SQL_NAME: " );
            _inout_rBuffer.append( '"' );
            _inout_rBuffer.append( m_aNodeValue );
            _inout_rBuffer.append( '"' );
            _inout_rBuffer.append( '\n' );
             break;

        case SQLNodeType::String:
            _inout_rBuffer.appendAscii( "SQL_STRING: " );
            _inout_rBuffer.append( '\'' );
            _inout_rBuffer.append( m_aNodeValue );
            _inout_rBuffer.append( '\'' );
            _inout_rBuffer.append( '\n' );
            break;

        case SQLNodeType::IntNum:
            _inout_rBuffer.appendAscii( "SQL_INTNUM: " );
            _inout_rBuffer.append( m_aNodeValue );
            _inout_rBuffer.append( '\n' );
            break;

        case SQLNodeType::ApproxNum:
            _inout_rBuffer.appendAscii( "SQL_APPROXNUM: " );
            _inout_rBuffer.append( m_aNodeValue );
            _inout_rBuffer.append( '\n' );
             break;

        case SQLNodeType::Punctuation:
            _inout_rBuffer.appendAscii( "SQL_PUNCTUATION: " );
            _inout_rBuffer.append( m_aNodeValue );
            _inout_rBuffer.append( '\n' );
            break;

        case SQLNodeType::Equal:
        case SQLNodeType::Less:
        case SQLNodeType::Great:
        case SQLNodeType::LessEq:
        case SQLNodeType::GreatEq:
        case SQLNodeType::NotEqual:
            _inout_rBuffer.append( m_aNodeValue );
            _inout_rBuffer.append( '\n' );
            break;

        case SQLNodeType::AccessDate:
            _inout_rBuffer.appendAscii( "SQL_ACCESS_DATE: " );
            _inout_rBuffer.append( m_aNodeValue );
            _inout_rBuffer.append( '\n' );
            break;

        case SQLNodeType::Concat:
            _inout_rBuffer.appendAscii( "||" );
            _inout_rBuffer.append( '\n' );
            break;

        default:
            SAL_INFO( "connectivity.parse", "-- " << int( m_eNodeType ) );
            SAL_WARN( "connectivity.parse", "OSQLParser::ShowParseTree: unzulaessiger NodeType" );
        }
    }
}
#endif // OSL_DEBUG_LEVEL > 0

// Insert methods

void OSQLParseNode::insert(sal_uInt32 nPos, OSQLParseNode* pNewSubTree)
{
    assert(pNewSubTree != nullptr && "OSQLParseNode: invalid NewSubTree");
    OSL_ENSURE(pNewSubTree->getParent() == nullptr, "OSQLParseNode: Node is not an orphan");

    // Create connection to getParent
    pNewSubTree->setParent( this );
    m_aChildren.emplace(m_aChildren.begin() + nPos, pNewSubTree);
}

// removeAt methods

OSQLParseNode* OSQLParseNode::removeAt(sal_uInt32 nPos)
{
    assert(nPos < m_aChildren.size() && "Illegal position for removeAt");
    auto aPos(m_aChildren.begin() + nPos);
    auto pNode = std::move(*aPos);

    // Set the getParent of the removed node to NULL
    pNode->setParent( nullptr );

    m_aChildren.erase(aPos);
    return pNode.release();
}

// Replace methods

void OSQLParseNode::replaceAndDelete(OSQLParseNode* pOldSubNode, OSQLParseNode* pNewSubNode )
{
    assert(pOldSubNode != nullptr && pNewSubNode != nullptr && "OSQLParseNode: invalid nodes");
    assert(pOldSubNode != pNewSubNode && "OSQLParseNode: same node");
    assert(pNewSubNode->getParent() == nullptr && "OSQLParseNode: node already has getParent");
    assert(std::any_of(m_aChildren.begin(), m_aChildren.end(),
                   [&] (std::unique_ptr<OSQLParseNode> const & r) { return r.get() == pOldSubNode; })
               && "OSQLParseNode::Replace() Node not element of parent");
    assert(std::none_of(m_aChildren.begin(), m_aChildren.end(),
                   [&] (std::unique_ptr<OSQLParseNode> const & r) { return r.get() == pNewSubNode; })
               && "OSQLParseNode::Replace() Node already element of parent");

    pOldSubNode->setParent( nullptr );
    pNewSubNode->setParent( this );
    auto it = std::find_if(m_aChildren.begin(), m_aChildren.end(),
        [&pOldSubNode](const std::unique_ptr<OSQLParseNode>& rxChild) { return rxChild.get() == pOldSubNode; });
    assert(it != m_aChildren.end());
    it->reset(pNewSubNode);
}

void OSQLParseNode::parseLeaf(OUStringBuffer& rString, const SQLParseNodeParameter& rParam) const
{
    // Found a leaf
    // Append content to the output string
    switch (m_eNodeType)
    {
        case SQLNodeType::Keyword:
        {
            if (!rString.isEmpty())
                rString.append(" ");

            const OString sT = OSQLParser::TokenIDToStr(m_nNodeID, rParam.bInternational ? &rParam.m_rContext :  nullptr);
            rString.append(OStringToOUString(sT,RTL_TEXTENCODING_UTF8));
        }   break;
        case SQLNodeType::String:
            if (!rString.isEmpty())
                rString.append(" ");
            rString.append(SetQuotation(m_aNodeValue, u"\'", u"\'\'"));
            break;
        case SQLNodeType::Name:
            if (!rString.isEmpty())
            {
                switch(rString[rString.getLength()-1])
                {
                    case ' ' :
                    case '.' : break;
                    default  :
                        if  (   rParam.aMetaData.getCatalogSeparator().isEmpty()
                                || rString[rString.getLength() - 1] != rParam.aMetaData.getCatalogSeparator().toChar()
                            )
                            rString.append(" ");
                        break;
                }
            }
            if (rParam.bQuote)
            {
                if (rParam.bPredicate)
                {
                    rString.append("[");
                    rString.append(m_aNodeValue);
                    rString.append("]");
                }
                else
                    rString.append(SetQuotation(m_aNodeValue,
                        rParam.aMetaData.getIdentifierQuoteString(), rParam.aMetaData.getIdentifierQuoteString() ));
            }
            else
                rString.append(m_aNodeValue);
            break;
        case SQLNodeType::AccessDate:
            if (!rString.isEmpty())
                rString.append(" ");
            rString.append("#");
            rString.append(m_aNodeValue);
            rString.append("#");
            break;

        case SQLNodeType::IntNum:
        case SQLNodeType::ApproxNum:
            {
                OUString aTmp = m_aNodeValue;
                static constexpr OUString strPoint(u"."_ustr);
                if (rParam.bInternational && rParam.bPredicate && rParam.sDecSep != strPoint)
                    aTmp = aTmp.replaceAll(strPoint, rParam.sDecSep);

                if (!rString.isEmpty())
                    rString.append(" ");
                rString.append(aTmp);

            }   break;
        case SQLNodeType::Punctuation:
            if ( getParent() && SQL_ISRULE(getParent(),cast_spec) && m_aNodeValue.toChar() == '(' ) // no spaces in front of '('
            {
                rString.append(m_aNodeValue);
                break;
            }
            [[fallthrough]];
        default:
            if (!rString.isEmpty() && m_aNodeValue.toChar() != '.' && m_aNodeValue.toChar() != ':' )
            {
                switch( rString[rString.getLength() - 1] )
                {
                    case ' ' :
                    case '.' : break;
                    default  :
                        if  (   rParam.aMetaData.getCatalogSeparator().isEmpty()
                            ||  rString[rString.getLength() - 1] != rParam.aMetaData.getCatalogSeparator().toChar()
                            )
                            rString.append(" ");
                        break;
                }
            }
            rString.append(m_aNodeValue);
    }
}


sal_Int32 OSQLParser::getFunctionReturnType(std::u16string_view _sFunctionName, const IParseContext* pContext)
{
    sal_Int32 nType = DataType::SQLNULL;
    OString sFunctionName(OUStringToOString(_sFunctionName,RTL_TEXTENCODING_UTF8));

    if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_ASCII,pContext)))                     nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_BIT_LENGTH,pContext)))           nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_CHAR,pContext)))                 nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_CHAR_LENGTH,pContext)))          nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_CONCAT,pContext)))               nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_DIFFERENCE,pContext)))           nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_INSERT,pContext)))               nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_LCASE,pContext)))                nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_LEFT,pContext)))                 nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_LENGTH,pContext)))               nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_LOCATE,pContext)))               nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_LOCATE_2,pContext)))             nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_LTRIM,pContext)))                nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_OCTET_LENGTH,pContext)))         nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_POSITION,pContext)))             nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_REPEAT,pContext)))               nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_REPLACE,pContext)))              nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_RIGHT,pContext)))                nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_RTRIM,pContext)))                nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_SOUNDEX,pContext)))              nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_SPACE,pContext)))                nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_SUBSTRING,pContext)))            nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_UCASE,pContext)))                nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_CURRENT_DATE,pContext)))         nType = DataType::DATE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_CURRENT_TIME,pContext)))         nType = DataType::TIME;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_CURRENT_TIMESTAMP,pContext)))    nType = DataType::TIMESTAMP;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_CURDATE,pContext)))              nType = DataType::DATE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_DATEDIFF,pContext)))             nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_DATEVALUE,pContext)))            nType = DataType::DATE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_CURTIME,pContext)))              nType = DataType::TIME;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_DAYNAME,pContext)))              nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_DAYOFMONTH,pContext)))           nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_DAYOFWEEK,pContext)))            nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_DAYOFYEAR,pContext)))            nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_EXTRACT,pContext)))              nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_HOUR,pContext)))                 nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_MINUTE,pContext)))               nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_MONTH,pContext)))                nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_MONTHNAME,pContext)))            nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_NOW,pContext)))                  nType = DataType::TIMESTAMP;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_QUARTER,pContext)))              nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_SECOND,pContext)))               nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_TIMESTAMPADD,pContext)))         nType = DataType::TIMESTAMP;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_TIMESTAMPDIFF,pContext)))        nType = DataType::TIMESTAMP;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_TIMEVALUE,pContext)))            nType = DataType::TIMESTAMP;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_WEEK,pContext)))                 nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_YEAR,pContext)))                 nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_ABS,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_ACOS,pContext)))                 nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_ASIN,pContext)))                 nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_ATAN,pContext)))                 nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_ATAN2,pContext)))                nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_CEILING,pContext)))              nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_COS,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_COT,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_DEGREES,pContext)))              nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_EXP,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_FLOOR,pContext)))                nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_LOGF,pContext)))                 nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_LOG,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_LOG10,pContext)))                nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_LN,pContext)))                   nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_MOD,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_PI,pContext)))                   nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_POWER,pContext)))                nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_RADIANS,pContext)))              nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_RAND,pContext)))                 nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_ROUND,pContext)))                nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_ROUNDMAGIC,pContext)))           nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_SIGN,pContext)))                 nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_SIN,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_SQRT,pContext)))                 nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_TAN,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_TRUNCATE,pContext)))             nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_COUNT,pContext)))                nType = DataType::INTEGER;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_MAX,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_MIN,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_AVG,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_SUM,pContext)))                  nType = DataType::DOUBLE;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_LOWER,pContext)))                nType = DataType::VARCHAR;
    else if(sFunctionName.equalsIgnoreAsciiCase(TokenIDToStr(SQL_TOKEN_UPPER,pContext)))                nType = DataType::VARCHAR;

    return nType;
}

sal_Int32 OSQLParser::getFunctionParameterType(sal_uInt32 _nTokenId, sal_uInt32 _nPos)
{
    sal_Int32 nType = DataType::VARCHAR;

    if(_nTokenId == SQL_TOKEN_CHAR)                 nType = DataType::INTEGER;
    else if(_nTokenId == SQL_TOKEN_INSERT)
    {
        if ( _nPos == 2 || _nPos == 3 )
            nType = DataType::INTEGER;
    }
    else if(_nTokenId == SQL_TOKEN_LEFT)
    {
        if ( _nPos == 2 )
            nType = DataType::INTEGER;
    }
    else if(_nTokenId == SQL_TOKEN_LOCATE)
    {
        if ( _nPos == 3 )
            nType = DataType::INTEGER;
    }
    else if(_nTokenId == SQL_TOKEN_LOCATE_2)
    {
        if ( _nPos == 3 )
            nType = DataType::INTEGER;
    }
    else if( _nTokenId == SQL_TOKEN_REPEAT || _nTokenId == SQL_TOKEN_RIGHT )
    {
        if ( _nPos == 2 )
            nType = DataType::INTEGER;
    }
    else if(_nTokenId == SQL_TOKEN_SPACE )
    {
        nType = DataType::INTEGER;
    }
    else if(_nTokenId == SQL_TOKEN_SUBSTRING)
    {
        if ( _nPos != 1 )
            nType = DataType::INTEGER;
    }
    else if(_nTokenId == SQL_TOKEN_DATEDIFF)
    {
        if ( _nPos != 1 )
            nType = DataType::TIMESTAMP;
    }
    else if(_nTokenId == SQL_TOKEN_DATEVALUE)
        nType = DataType::DATE;
    else if(_nTokenId == SQL_TOKEN_DAYNAME)
        nType = DataType::DATE;
    else if(_nTokenId == SQL_TOKEN_DAYOFMONTH)
        nType = DataType::DATE;
    else if(_nTokenId == SQL_TOKEN_DAYOFWEEK)
        nType = DataType::DATE;
    else if(_nTokenId == SQL_TOKEN_DAYOFYEAR)
        nType = DataType::DATE;
    else if(_nTokenId == SQL_TOKEN_EXTRACT)              nType = DataType::VARCHAR;
    else if(_nTokenId == SQL_TOKEN_HOUR)                 nType = DataType::TIME;
    else if(_nTokenId == SQL_TOKEN_MINUTE)               nType = DataType::TIME;
    else if(_nTokenId == SQL_TOKEN_MONTH)                nType = DataType::DATE;
    else if(_nTokenId == SQL_TOKEN_MONTHNAME)            nType = DataType::DATE;
    else if(_nTokenId == SQL_TOKEN_NOW)                  nType = DataType::TIMESTAMP;
    else if(_nTokenId == SQL_TOKEN_QUARTER)              nType = DataType::DATE;
    else if(_nTokenId == SQL_TOKEN_SECOND)               nType = DataType::TIME;
    else if(_nTokenId == SQL_TOKEN_TIMESTAMPADD)         nType = DataType::TIMESTAMP;
    else if(_nTokenId == SQL_TOKEN_TIMESTAMPDIFF)        nType = DataType::TIMESTAMP;
    else if(_nTokenId == SQL_TOKEN_TIMEVALUE)            nType = DataType::TIMESTAMP;
    else if(_nTokenId == SQL_TOKEN_WEEK)                 nType = DataType::DATE;
    else if(_nTokenId == SQL_TOKEN_YEAR)                 nType = DataType::DATE;

    else if(_nTokenId == SQL_TOKEN_ABS)                  nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_ACOS)                 nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_ASIN)                 nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_ATAN)                 nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_ATAN2)                nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_CEILING)              nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_COS)                  nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_COT)                  nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_DEGREES)              nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_EXP)                  nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_FLOOR)                nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_LOGF)                 nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_LOG)                  nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_LOG10)                nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_LN)                   nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_MOD)                  nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_PI)                   nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_POWER)                nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_RADIANS)              nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_RAND)                 nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_ROUND)                nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_ROUNDMAGIC)           nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_SIGN)                 nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_SIN)                  nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_SQRT)                 nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_TAN)                  nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_TRUNCATE)             nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_COUNT)                nType = DataType::INTEGER;
    else if(_nTokenId == SQL_TOKEN_MAX)                  nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_MIN)                  nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_AVG)                  nType = DataType::DOUBLE;
    else if(_nTokenId == SQL_TOKEN_SUM)                  nType = DataType::DOUBLE;

    else if(_nTokenId == SQL_TOKEN_LOWER)                nType = DataType::VARCHAR;
    else if(_nTokenId == SQL_TOKEN_UPPER)                nType = DataType::VARCHAR;

    return nType;
}


const SQLError& OSQLParser::getErrorHelper() const
{
    return m_pData->aErrors;
}


OSQLParseNode::Rule OSQLParseNode::getKnownRuleID() const
{
    if ( !isRule() )
        return UNKNOWN_RULE;
    return OSQLParser::RuleIDToRule( getRuleID() );
}

OUString OSQLParseNode::getTableRange(const OSQLParseNode* _pTableRef)
{
    assert(_pTableRef);
    OSL_ENSURE(_pTableRef->count() > 1 && _pTableRef->getKnownRuleID() == OSQLParseNode::table_ref,"Invalid node give, only table ref is allowed!");
    const sal_uInt32 nCount = _pTableRef->count();
    OUString sTableRange;
    if ( nCount == 2 || (nCount == 3 && !_pTableRef->getChild(0)->isToken()) )
    {
        const OSQLParseNode* pNode = _pTableRef->getChild(nCount - (nCount == 2 ? 1 : 2));
        assert(pNode);
        OSL_ENSURE(pNode->getKnownRuleID() == OSQLParseNode::table_primary_as_range_column ||
                   pNode->getKnownRuleID() == OSQLParseNode::range_variable, "SQL grammar changed!");
        if ( !pNode->isLeaf() )
            sTableRange = pNode->getChild(1)->getTokenValue();
    } // if ( nCount == 2 || nCount == 3 )

    return sTableRange;
}

OSQLParseNodesContainer::OSQLParseNodesContainer()
{
}

OSQLParseNodesContainer::~OSQLParseNodesContainer()
{
}

void OSQLParseNodesContainer::push_back(OSQLParseNode* _pNode)
{
    std::unique_lock aGuard(m_aMutex);
    m_aNodes.push_back(_pNode);
}

void OSQLParseNodesContainer::erase(OSQLParseNode* _pNode)
{
    std::unique_lock aGuard(m_aMutex);
    if ( !m_aNodes.empty() )
    {
        std::vector< OSQLParseNode* >::iterator aFind = std::find(m_aNodes.begin(), m_aNodes.end(),_pNode);
        if ( aFind != m_aNodes.end() )
            m_aNodes.erase(aFind);
    }
}

void OSQLParseNodesContainer::clear()
{
    std::unique_lock aGuard(m_aMutex);
    m_aNodes.clear();
}

void OSQLParseNodesContainer::clearAndDelete()
{
    std::unique_lock aGuard(m_aMutex);
    // clear the garbage collector
    while ( !m_aNodes.empty() )
    {
        OSQLParseNode* pNode = m_aNodes[0];
        while ( pNode->getParent() )
        {
            pNode = pNode->getParent();
        }
        aGuard.unlock(); // can call back into this object during destruction
        delete pNode;
        aGuard.lock();
    }
}
}   // namespace connectivity

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