public override string CreateAlterTableRelationSQL(TableDefInfo tableInfo, RelationDefInfo relInfo)
        {
            string addBegin = DBConstants.EMPTY_STRING;
            string addClose = DBConstants.EMPTY_STRING;

            if (tableInfo.EnforceRelation(relInfo))
            {
                return(CreateRelationSQL(relInfo, addBegin, addClose));
            }

            return(DBConstants.EMPTY_STRING);
        }