    /* -*- 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 <connectivity/TKeys.hxx>
    #include <connectivity/TKey.hxx>
    #include <com/sun/star/sdbc/XRow.hpp>
    #include <com/sun/star/sdbc/XResultSet.hpp>
    #include <com/sun/star/sdbcx/KeyType.hpp>
    #include <com/sun/star/sdbc/KeyRule.hpp>
    #include <connectivity/dbtools.hxx>
    #include <comphelper/types.hxx>
    #include <TConnection.hxx>

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

    OKeysHelper::OKeysHelper(   OTableHelper* _pTable,
            ::osl::Mutex& _rMutex,
            const ::std::vector< OUString>& _rVector
            ) : OKeys_BASE(*_pTable,true,_rMutex,_rVector,true)
        ,m_pTable(_pTable)
    {
    }

    sdbcx::ObjectType OKeysHelper::createObject(const OUString& _rName)
    {
        sdbcx::ObjectType xRet;

        if(!_rName.isEmpty())
        {
            OTableKeyHelper* pRet = new OTableKeyHelper(m_pTable,_rName,m_pTable->getKeyProperties(_rName));
            xRet = pRet;
        }

        if(!xRet.is()) // we have a primary key with a system name
        {
            OTableKeyHelper* pRet = new OTableKeyHelper(m_pTable,_rName,m_pTable->getKeyProperties(_rName));
            xRet = pRet;
        }

        return xRet;
    }

    void OKeysHelper::impl_refresh()
    {
        m_pTable->refreshKeys();
    }

    Reference< XPropertySet > OKeysHelper::createDescriptor()
    {
        return new OTableKeyHelper(m_pTable);
    }

    /** returns the keyrule string for the primary key
    */
    OUString getKeyRuleString(bool _bUpdate,sal_Int32 _nKeyRule)
    {
        const char* pKeyRule = nullptr;
        switch ( _nKeyRule )
        {
            case KeyRule::CASCADE:
                pKeyRule = _bUpdate ? " ON UPDATE CASCADE " : " ON DELETE CASCADE ";
                break;
            case KeyRule::RESTRICT:
                pKeyRule = _bUpdate ? " ON UPDATE RESTRICT " : " ON DELETE RESTRICT ";
                break;
            case KeyRule::SET_NULL:
                pKeyRule = _bUpdate ? " ON UPDATE SET NULL " : " ON DELETE SET NULL ";
                break;
            case KeyRule::SET_DEFAULT:
                pKeyRule = _bUpdate ? " ON UPDATE SET DEFAULT " : " ON DELETE SET DEFAULT ";
                break;
            default:
                ;
        }
        OUString sRet;
        if ( pKeyRule )
            sRet = OUString::createFromAscii(pKeyRule);
        return sRet;
    }

    void OKeysHelper::cloneDescriptorColumns( const sdbcx::ObjectType& _rSourceDescriptor, const sdbcx::ObjectType& _rDestDescriptor )
    {
        Reference< XColumnsSupplier > xColSupp( _rSourceDescriptor, UNO_QUERY_THROW );
        Reference< XIndexAccess > xSourceCols( xColSupp->getColumns(), UNO_QUERY_THROW );

        xColSupp.set( _rDestDescriptor, UNO_QUERY_THROW );
        Reference< XAppend > xDestAppend( xColSupp->getColumns(), UNO_QUERY_THROW );

        sal_Int32 nCount = xSourceCols->getCount();
        for ( sal_Int32 i=0; i< nCount; ++i )
        {
            Reference< XPropertySet > xColProp( xSourceCols->getByIndex(i), UNO_QUERY );
            xDestAppend->appendByDescriptor( xColProp );
        }
    }

    // XAppend
    sdbcx::ObjectType OKeysHelper::appendObject( const OUString& _rForName, const Reference< XPropertySet >& descriptor )
    {
        Reference< XConnection> xConnection = m_pTable->getConnection();
        if ( !xConnection.is() )
            return nullptr;
        if ( m_pTable->isNew() )
        {
            Reference< XPropertySet > xNewDescriptor( cloneDescriptor( descriptor ) );
            cloneDescriptorColumns( descriptor, xNewDescriptor );
            return xNewDescriptor;
        }

        const ::dbtools::OPropertyMap& rPropMap = OMetaConnection::getPropMap();
        sal_Int32 nKeyType      = getINT32(descriptor->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_TYPE)));
        sal_Int32 nUpdateRule = 0, nDeleteRule = 0;
        OUString sReferencedName;

        if ( nKeyType == KeyType::FOREIGN )
        {
            descriptor->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_REFERENCEDTABLE)) >>= sReferencedName;
            descriptor->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_UPDATERULE)) >>= nUpdateRule;
            descriptor->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_DELETERULE)) >>= nDeleteRule;
        }

        if ( m_pTable->getKeyService().is() )
        {
            m_pTable->getKeyService()->addKey(m_pTable,descriptor);
        }
        else
        {
            // if we're here, we belong to a table which is not new, i.e. already exists in the database.
            // In this case, really append the new index.
            OUStringBuffer aSql;
            aSql.append("ALTER TABLE ");
            OUString aQuote  = m_pTable->getConnection()->getMetaData()->getIdentifierQuoteString(  );

            aSql.append(composeTableName( m_pTable->getConnection()->getMetaData(), m_pTable, ::dbtools::EComposeRule::InTableDefinitions, true ));
            aSql.append(" ADD ");

            if ( nKeyType == KeyType::PRIMARY )
            {
                aSql.append(" PRIMARY KEY (");
            }
            else if ( nKeyType == KeyType::FOREIGN )
            {
                aSql.append(" FOREIGN KEY (");
            }
            else
                throw SQLException();

            Reference<XColumnsSupplier> xColumnSup(descriptor,UNO_QUERY);
            Reference<XIndexAccess> xColumns(xColumnSup->getColumns(),UNO_QUERY);
            Reference< XPropertySet > xColProp;
            for(sal_Int32 i = 0 ; i < xColumns->getCount() ; ++i)
            {
                if ( i > 0 )
                    aSql.append(",");
                xColProp.set(xColumns->getByIndex(i), css::uno::UNO_QUERY);
                aSql.append( ::dbtools::quoteName( aQuote,getString(xColProp->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_NAME)))) );

            }
            aSql.append(")");

            if ( nKeyType == KeyType::FOREIGN )
            {
                aSql.append(" REFERENCES ");
                aSql.append(::dbtools::quoteTableName(m_pTable->getConnection()->getMetaData(),sReferencedName,::dbtools::EComposeRule::InTableDefinitions));
                aSql.append(" (");

                for(sal_Int32 i=0;i<xColumns->getCount();++i)
                {
                    if ( i > 0 )
                        aSql.append(",");
                    xColumns->getByIndex(i) >>= xColProp;
                    aSql.append(::dbtools::quoteName( aQuote,getString(xColProp->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_RELATEDCOLUMN)))));

                }
                aSql.append(")");
                aSql.append(getKeyRuleString(true   ,nUpdateRule));
                aSql.append(getKeyRuleString(false  ,nDeleteRule));
            }

            Reference< XStatement > xStmt = m_pTable->getConnection()->createStatement(  );
            xStmt->execute(aSql.makeStringAndClear());
        }
        // find the name which the database gave the new key
        OUString sNewName( _rForName );
        try
        {
            OUString aSchema,aTable;
            m_pTable->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_SCHEMANAME)) >>= aSchema;
            m_pTable->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_NAME))       >>= aTable;
            Reference< XResultSet > xResult;
            sal_Int32 nColumn = 12;
            if ( nKeyType == KeyType::FOREIGN )
                xResult = m_pTable->getMetaData()->getImportedKeys( m_pTable->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_CATALOGNAME))
                                                                                        ,aSchema
                                                                                        ,aTable);
            else
            {
                xResult = m_pTable->getMetaData()->getPrimaryKeys( m_pTable->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_CATALOGNAME))
                                                                                        ,aSchema
                                                                                        ,aTable);
                nColumn = 6;
            }
            if ( xResult.is() )
            {
                Reference< XRow > xRow(xResult,UNO_QUERY);
                while( xResult->next() )
                {
                    OUString sName = xRow->getString(nColumn);
                    if ( !m_pElements->exists(sName) ) // this name wasn't inserted yet so it must be the new one
                    {
                        descriptor->setPropertyValue( rPropMap.getNameByIndex( PROPERTY_ID_NAME ), makeAny( sName ) );
                        sNewName = sName;
                        break;
                    }
                }
                ::comphelper::disposeComponent(xResult);
            }
        }
        catch(const SQLException&)
        {
        }

        m_pTable->addKey(sNewName,std::make_shared<sdbcx::KeyProperties>(sReferencedName,nKeyType,nUpdateRule,nDeleteRule));

        return createObject( sNewName );
    }

    OUString OKeysHelper::getDropForeignKey() const
    {
        return OUString(" DROP CONSTRAINT ");
    }

    // XDrop
    void OKeysHelper::dropObject(sal_Int32 _nPos, const OUString& _sElementName)
    {
        Reference< XConnection> xConnection = m_pTable->getConnection();
        if ( xConnection.is() && !m_pTable->isNew() )
        {
            Reference<XPropertySet> xKey(getObject(_nPos),UNO_QUERY);
            if ( m_pTable->getKeyService().is() )
            {
                m_pTable->getKeyService()->dropKey(m_pTable,xKey);
            }
            else
            {
                OUStringBuffer aSql;
                aSql.append("ALTER TABLE ");

                aSql.append( composeTableName( m_pTable->getConnection()->getMetaData(), m_pTable,::dbtools::EComposeRule::InTableDefinitions, true ));

                sal_Int32 nKeyType = KeyType::PRIMARY;
                if ( xKey.is() )
                {
                    ::dbtools::OPropertyMap& rPropMap = OMetaConnection::getPropMap();
                    xKey->getPropertyValue(rPropMap.getNameByIndex(PROPERTY_ID_TYPE)) >>= nKeyType;
                }
                if ( KeyType::PRIMARY == nKeyType )
                {
                    aSql.append(" DROP PRIMARY KEY");
                }
                else
                {
                    aSql.append(getDropForeignKey());
                    const OUString aQuote    = m_pTable->getConnection()->getMetaData()->getIdentifierQuoteString();
                    aSql.append( ::dbtools::quoteName( aQuote,_sElementName) );
                }

                Reference< XStatement > xStmt = m_pTable->getConnection()->createStatement(  );
                if ( xStmt.is() )
                {
                    xStmt->execute(aSql.makeStringAndClear());
                    ::comphelper::disposeComponent(xStmt);
                }
            }
        }
    }

    } // namespace connectivity

    /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

↑ V547 Expression 'KeyType::PRIMARY == nKeyType' is always true.