typo3/sysext/extbase/Classes/Persistence/Storage/Typo3DbBackend.php

   1 <?php
   2 /***************************************************************
   3 *  Copyright notice
   4 *
   5 *  (c) 2009 Jochen Rau <jochen.rau@typoplanet.de>
   6 *  All rights reserved
   7 *
   8 *  This class is a backport of the corresponding class of FLOW3.
   9 *  All credits go to the v5 team.
  10 *
  11 *  This script is part of the TYPO3 project. The TYPO3 project is
  12 *  free software; you can redistribute it and/or modify
  13 *  it under the terms of the GNU General Public License as published by
  14 *  the Free Software Foundation; either version 2 of the License, or
  15 *  (at your option) any later version.
  16 *
  17 *  The GNU General Public License can be found at
  18 *  http://www.gnu.org/copyleft/gpl.html.
  19 *
  20 *  This script is distributed in the hope that it will be useful,
  21 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 *  GNU General Public License for more details.
  24 *
  25 *  This copyright notice MUST APPEAR in all copies of the script!
  26 ***************************************************************/
  27
  28 /**
  29  * A Storage backend
  30  *
  31  * @package Extbase
  32  * @subpackage Persistence\Storage
  33  * @version $Id: $
  34  */
  35 class Tx_Extbase_Persistence_Storage_Typo3DbBackend implements Tx_Extbase_Persistence_Storage_BackendInterface, t3lib_Singleton {
  36
  37         const OPERATOR_EQUAL_TO_NULL = 'operatorEqualToNull';
  38         const OPERATOR_NOT_EQUAL_TO_NULL = 'operatorNotEqualToNull';
  39         const OPERATOR_IN = 'operatorIn';
  40         const OPERATOR_NOT_IN = 'operatorNotIn';
  41
  42         /**
  43          * The TYPO3 database object
  44          *
  45          * @var t3lib_db
  46          */
  47         protected $databaseHandle;
  48
  49         /**
  50          * @var Tx_Extbase_Persistence_DataMapper
  51          */
  52         protected $dataMapper;
  53
  54         /**
  55          * The TYPO3 page select object. Used for language and workspace overlay
  56          *
  57          * @var t3lib_pageSelect
  58          */
  59         protected $pageSelectObject;
  60
  61         /**
  62          * A first-level TypoScript configuration cache
  63          *
  64          * @var array
  65          */
  66         protected $pageTSConfigCache = array();
  67
  68         /**
  69          * Caches information about tables (esp. the existing column names)
  70          *
  71          * @var array
  72          */
  73         protected $tableInformationCache = array();
  74
  75         /**
  76          * Constructs this Storage Backend instance
  77          *
  78          * @param t3lib_db $databaseHandle The database handle
  79          */
  80         public function __construct($databaseHandle) {
  81                 $this->databaseHandle = $databaseHandle;
  82         }
  83
  84         /**
  85          * Injects the DataMapper to map nodes to objects
  86          *
  87          * @param Tx_Extbase_Persistence_Mapper_DataMapper $dataMapper
  88          * @return void
  89          */
  90         public function injectDataMapper(Tx_Extbase_Persistence_Mapper_DataMapper $dataMapper) {
  91                 $this->dataMapper = $dataMapper;
  92         }
  93
  94         /**
  95          * Adds a row to the storage
  96          *
  97          * @param string $tableName The database table name
  98          * @param array $row The row to be inserted
  99          * @param boolean $isRelation TRUE if we are currently inserting into a relation table, FALSE by default
 100          * @return int The uid of the inserted row
 101          */
 102         public function addRow($tableName, array $row, $isRelation = FALSE) {
 103                 $fields = array();
 104                 $values = array();
 105                 $parameters = array();
 106                 if (isset($row['uid'])) {
 107                         unset($row['uid']);
 108                 }
 109                 foreach ($row as $columnName => $value) {
 110                         $fields[] = $columnName;
 111                         $values[] = '?';
 112                         $parameters[] = $value;
 113                 }
 114
 115                 $sqlString = 'INSERT INTO ' . $tableName . ' (' . implode(', ', $fields) . ') VALUES (' . implode(', ', $values) . ')';
 116                 $this->replacePlaceholders($sqlString, $parameters);
 117                 // debug($sqlString,-2);
 118                 $this->databaseHandle->sql_query($sqlString);
 119                 $this->checkSqlErrors();
 120                 $uid = $this->databaseHandle->sql_insert_id();
 121                 if (!$isRelation) {
 122                         $this->clearPageCache($tableName, $uid);
 123                 }
 124                 return (int)$uid;
 125         }
 126
 127         /**
 128          * Updates a row in the storage
 129          *
 130          * @param string $tableName The database table name
 131          * @param array $row The row to be updated
 132          * @param boolean $isRelation TRUE if we are currently inserting into a relation table, FALSE by default
 133          * @return void
 134          */
 135         public function updateRow($tableName, array $row, $isRelation = FALSE) {
 136                 if (!isset($row['uid'])) throw new InvalidArgumentException('The given row must contain a value for "uid".');
 137                 $uid = (int)$row['uid'];
 138                 unset($row['uid']);
 139                 $fields = array();
 140                 $parameters = array();
 141                 foreach ($row as $columnName => $value) {
 142                         $fields[] = $columnName . '=?';
 143                         $parameters[] = $value;
 144                 }
 145                 $parameters[] = $uid;
 146
 147                 $sqlString = 'UPDATE ' . $tableName . ' SET ' . implode(', ', $fields) . ' WHERE uid=?';
 148                 $this->replacePlaceholders($sqlString, $parameters);
 149                 // debug($sqlString,-2);
 150                 $returnValue = $this->databaseHandle->sql_query($sqlString);
 151                 $this->checkSqlErrors();
 152                 if (!$isRelation) {
 153                         $this->clearPageCache($tableName, $uid);
 154                 }
 155                 return $returnValue;
 156         }
 157
 158         /**
 159          * Deletes a row in the storage
 160          *
 161          * @param string $tableName The database table name
 162          * @param array $identifyer An array of identifyer array('fieldname' => value). This array will be transformed to a WHERE clause
 163          * @param boolean $isRelation TRUE if we are currently inserting into a relation table, FALSE by default
 164          * @return void
 165          */
 166         public function removeRow($tableName, array $identifyer, $isRelation = FALSE) {
 167                 $fieldNames = array_keys($identifyer);
 168                 $suffixedFieldNames = array();
 169                 foreach ($fieldNames as $fieldName) {
 170                         $suffixedFieldNames[] = $fieldName . '=?';
 171                 }
 172                 $parameters = array_values($identifyer);
 173                 $statement = 'DELETE FROM ' . $tableName;
 174                 $statement .= ' WHERE ' . implode(' AND ', $suffixedFieldNames);
 175                 $this->replacePlaceholders($statement, $parameters);
 176                 if (!$isRelation) {
 177                         $this->clearPageCache($tableName, $uid, $isRelation);
 178                 }
 179                 $returnValue = $this->databaseHandle->sql_query($statement);
 180                 $this->checkSqlErrors();
 181                 return $returnValue;
 182         }
 183
 184         /**
 185          * Fetches row data from the database
 186          *
 187          * @param string $identifier The Identifier of the row to fetch
 188          * @param Tx_Extbase_Persistence_Mapper_DataMap $dataMap The Data Map
 189          * @return array|FALSE
 190          */
 191         public function getRowByIdentifier($identifier, Tx_Extbase_Persistence_Mapper_DataMap $dataMap) {
 192                 $tableName = $dataMap->getTableName();
 193                 $statement = 'SELECT * FROM ' . $tableName . ' WHERE uid=?';
 194                 $this->replacePlaceholders($statement, array($identifier));
 195                 // debug($statement,-2);
 196                 $res = $this->databaseHandle->sql_query($statement);
 197                 $this->checkSqlErrors();
 198                 $row = $this->databaseHandle->sql_fetch_assoc($res);
 199                 if ($row !== FALSE) {
 200                         return $row;
 201                 } else {
 202                         return FALSE;
 203                 }
 204         }
 205
 206         /**
 207          * Returns an array with tuples matching the query.
 208          *
 209          * @param Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query
 210          * @return array The matching tuples
 211          */
 212         public function getRows(Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query) {
 213                 $constraint = $query->getConstraint();
 214                 if($constraint instanceof Tx_Extbase_Persistence_QOM_StatementInterface) {
 215                         if ($constraint->getLanguage() === Tx_Extbase_Persistence_QOM_QueryObjectModelInterface::TYPO3_SQL_MYSQL) {
 216                                 $statement = $constraint->getStatement();
 217                                 $parameters = $query->getBoundVariableValues();
 218                         } else {
 219                                 throw new Tx_Extbase_Persistence_Exception('Unsupported query language.', 1248701951);
 220                         }
 221                 } else {
 222                         $parameters = array();
 223                         $statement = $this->getStatement($query, $parameters);
 224                 }
 225                 $this->replacePlaceholders($statement, $parameters);
 226                 // debug($statement,-2);
 227                 $result = $this->databaseHandle->sql_query($statement);
 228                 $this->checkSqlErrors();
 229                 return $this->getRowsFromResult($query->getSource(), $result);
 230         }
 231
 232         /**
 233          * Returns the number of tuples matching the query.
 234          *
 235          * @param Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query
 236          * @return int The number of matching tuples
 237          */
 238         public function countRows(Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query) {
 239                 $constraint = $query->getConstraint();
 240                 if($constraint instanceof Tx_Extbase_Persistence_QOM_StatementInterface) throw new Tx_Extbase_Persistence_Storage_Exception_BadConstraint('Could not execute count on queries with a constraint of type Tx_Extbase_Persistence_QOM_StatementInterface', 1256661045);
 241                 $parameters = array();
 242                 $statementParts = $this->parseQuery($query, $parameters);
 243                 $statementParts['fields'] = array('COUNT(*)');
 244                 $statement = $this->buildStatement($statementParts, $parameters);
 245                 $this->replacePlaceholders($statement, $parameters);
 246                 $result = $this->databaseHandle->sql_query($statement);
 247                 $this->checkSqlErrors();
 248                 $tuples = $this->getRowsFromResult($query->getSource(), $result);
 249                 return current(current($tuples));
 250         }
 251
 252         /**
 253          * Returns the statement, ready to be executed.
 254          *
 255          * @param Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query
 256          * @return string The SQL statement
 257          */
 258         public function getStatement(Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query, array &$parameters) {
 259                 $statementParts = $this->parseQuery($query, $parameters);
 260                 $statement = $this->buildStatement($statementParts);
 261                 return $statement;
 262         }
 263
 264         /**
 265          * Parses the query and returns the SQL statement parts.
 266          *
 267          * @param Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query
 268          * @return array The SQL statement parts
 269          */
 270         public function parseQuery(Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query, array &$parameters) {
 271                 $sql = array();
 272                 $sql['tables'] = array();
 273                 $sql['fields'] = array();
 274                 $sql['where'] = array();
 275                 $sql['additionalWhereClause'] = array();
 276                 $sql['orderings'] = array();
 277                 $sql['limit'] = array();
 278
 279                 $source = $query->getSource();
 280
 281                 $this->parseSource($query, $source, $sql, $parameters);
 282                 $this->parseConstraint($query->getConstraint(), $source, $sql, $parameters, $query->getBoundVariableValues());
 283                 $this->parseOrderings($query->getOrderings(), $source, $sql);
 284                 $this->parseLimitAndOffset($query->getLimit(), $query->getOffset(), $sql);
 285
 286                 return $sql;
 287         }
 288
 289         /**
 290          * Returns the statement, ready to be executed.
 291          *
 292          * @param array $sql The SQL statement parts
 293          * @return string The SQL statement
 294          */
 295         public function buildStatement(array $sql) {
 296                 $statement = 'SELECT ' . implode(',', $sql['fields']) . ' FROM ' . implode(' ', $sql['tables']);
 297                 if (!empty($sql['where'])) {
 298                         $statement .= ' WHERE ' . implode('', $sql['where']);
 299                         if (!empty($sql['additionalWhereClause'])) {
 300                                 $statement .= ' AND ' . implode(' AND ', $sql['additionalWhereClause']);
 301                         }
 302                 } elseif (!empty($sql['additionalWhereClause'])) {
 303                         $statement .= ' WHERE ' . implode(' AND ', $sql['additionalWhereClause']);
 304                 }
 305                 if (!empty($sql['orderings'])) {
 306                         $statement .= ' ORDER BY ' . implode(', ', $sql['orderings']);
 307                 }
 308                 if (!empty($sql['limit'])) {
 309                         $statement .= ' LIMIT ' . $sql['limit'];
 310                 }
 311                 return $statement;
 312         }
 313
 314         /**
 315          * Checks if a Value Object equal to the given Object exists in the data base
 316          *
 317          * @param Tx_Extbase_DomainObject_AbstractValueObject $object The Value Object
 318          * @return array The matching uid
 319          */
 320         public function getUidOfAlreadyPersistedValueObject(Tx_Extbase_DomainObject_AbstractValueObject $object) {
 321                 $fields = array();
 322                 $parameters = array();
 323                 $dataMap = $this->dataMapper->getDataMap(get_class($object));
 324                 $properties = $object->_getProperties();
 325                 foreach ($properties as $propertyName => $propertyValue) {
 326                         // FIXME We couple the Backend to the Entity implementation (uid, isClone); changes there breaks this method
 327                         if ($dataMap->isPersistableProperty($propertyName) && ($propertyName !== 'uid')  && ($propertyName !== 'pid') && ($propertyName !== 'isClone')) {
 328                                 $fields[] = $dataMap->getColumnMap($propertyName)->getColumnName() . '=?';
 329                                 $parameters[] = $dataMap->convertPropertyValueToFieldValue($propertyValue);
 330                         }
 331                 }
 332                 $sql = array();
 333                 $sql['additionalWhereClause'] = array();
 334
 335                 $tableName = $dataMap->getTableName();
 336                 $this->addEnableFieldsStatement($tableName, $sql);
 337
 338                 $statement = 'SELECT * FROM ' . $tableName;
 339                 $statement .= ' WHERE ' . implode(' AND ', $fields);
 340                 if (!empty($sql['additionalWhereClause'])) {
 341                         $statement .= ' AND ' . implode(' AND ', $sql['additionalWhereClause']);
 342                 }
 343                 $this->replacePlaceholders($statement, $parameters);
 344                 // debug($statement,-2);
 345                 $res = $this->databaseHandle->sql_query($statement);
 346                 $this->checkSqlErrors();
 347                 $row = $this->databaseHandle->sql_fetch_assoc($res);
 348                 if ($row !== FALSE) {
 349                         return (int)$row['uid'];
 350                 } else {
 351                         return FALSE;
 352                 }
 353         }
 354
 355         /**
 356          * Transforms a Query Source into SQL and parameter arrays
 357          *
 358          * @param Tx_Extbase_Persistence_QOM_QueryObjectModel $query
 359          * @param Tx_Extbase_Persistence_QOM_SourceInterface $source The source
 360          * @param array &$sql
 361          * @param array &$parameters
 362          * @return void
 363          */
 364         protected function parseSource(Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query, Tx_Extbase_Persistence_QOM_SourceInterface $source, array &$sql, array &$parameters) {
 365                 if ($source instanceof Tx_Extbase_Persistence_QOM_SelectorInterface) {
 366                         $tableName = $source->getSelectorName();
 367                         $sql['fields'][] = $tableName . '.*';
 368                         $sql['tables'][] = $tableName;
 369                         $querySettings = $query->getQuerySettings();
 370                         if ($querySettings instanceof Tx_Extbase_Persistence_Typo3QuerySettingsInterface) {
 371                                 if ($querySettings->getRespectEnableFields()) {
 372                                         $this->addEnableFieldsStatement($tableName, $sql);
 373                                 }
 374                                 if ($querySettings->getRespectStoragePage()) {
 375                                         $this->addPageIdStatement($tableName, $sql);
 376                                 }
 377                         }
 378                 } elseif ($source instanceof Tx_Extbase_Persistence_QOM_JoinInterface) {
 379                         $this->parseJoin($query, $source, $sql);
 380                 }
 381         }
 382
 383         /**
 384          * Transforms a Join into SQL and parameter arrays
 385          *
 386          * @param Tx_Extbase_Persistence_QOM_QueryObjectModel $query The Query Object Model
 387          * @param Tx_Extbase_Persistence_QOM_JoinInterface $join The join
 388          * @param array &$sql The query parts
 389          * @return void
 390          */
 391         protected function parseJoin(Tx_Extbase_Persistence_QOM_QueryObjectModelInterface $query, Tx_Extbase_Persistence_QOM_JoinInterface $join, array &$sql) {
 392                 $leftSource = $join->getLeft();
 393                 $leftTableName = $leftSource->getSelectorName();
 394                 $rightSource = $join->getRight();
 395                 $rightTableName = $rightSource->getSelectorName();
 396
 397                 $sql['fields'][] = $leftTableName . '.*';
 398                 $sql['fields'][] = $rightTableName . '.*';
 399
 400                 // TODO Implement support for different join types and nested joins
 401                 $sql['tables'][] = $leftTableName . ' LEFT JOIN ' . $rightTableName;
 402
 403                 $joinCondition = $join->getJoinCondition();
 404                 // TODO Check the parsing of the join
 405                 if ($joinCondition instanceof Tx_Extbase_Persistence_QOM_EquiJoinCondition) {
 406                         // TODO Discuss, if we should use $leftSource instead of $selector1Name
 407                         $column1Name = $this->dataMapper->convertPropertyNameToColumnName($joinCondition->getProperty1Name(), $leftSource->getNodeTypeName());
 408                         $column2Name = $this->dataMapper->convertPropertyNameToColumnName($joinCondition->getProperty2Name(), $rightSource->getNodeTypeName());
 409                         $sql['tables'][] = 'ON ' . $joinCondition->getSelector1Name() . '.' . $column1Name . ' = ' . $joinCondition->getSelector2Name() . '.' . $column2Name;
 410                 }
 411                 // TODO Implement childtableWhere
 412
 413                 $querySettings = $query->getQuerySettings();
 414                 if ($querySettings instanceof Tx_Extbase_Persistence_Typo3QuerySettingsInterface) {
 415                         if ($querySettings->getRespectEnableFields()) {
 416                                 $this->addEnableFieldsStatement($leftTableName, $sql);
 417                                 $this->addEnableFieldsStatement($rightTableName, $sql);
 418                         }
 419                         if ($querySettings->getRespectStoragePage()) {
 420                                 $this->addPageIdStatement($leftTableName, $sql);
 421                                 $this->addPageIdStatement($rightTableName, $sql);
 422                         }
 423                 }
 424         }
 425
 426         /**
 427          * Transforms a constraint into SQL and parameter arrays
 428          *
 429          * @param Tx_Extbase_Persistence_QOM_ConstraintInterface $constraint The constraint
 430          * @param Tx_Extbase_Persistence_QOM_SourceInterface $source The source
 431          * @param array &$sql The query parts
 432          * @param array &$parameters The parameters that will replace the markers
 433          * @param array $boundVariableValues The bound variables in the query (key) and their values (value)
 434          * @return void
 435          */
 436         protected function parseConstraint(Tx_Extbase_Persistence_QOM_ConstraintInterface $constraint = NULL, Tx_Extbase_Persistence_QOM_SourceInterface $source, array &$sql, array &$parameters, array $boundVariableValues) {
 437                 if ($constraint === NULL) return;
 438                 if ($constraint instanceof Tx_Extbase_Persistence_QOM_AndInterface) {
 439                         $sql['where'][] = '(';
 440                         $this->parseConstraint($constraint->getConstraint1(), $source, $sql, $parameters, $boundVariableValues);
 441                         $sql['where'][] = ' AND ';
 442                         $this->parseConstraint($constraint->getConstraint2(), $source, $sql, $parameters, $boundVariableValues);
 443                         $sql['where'][] = ')';
 444                 } elseif ($constraint instanceof Tx_Extbase_Persistence_QOM_OrInterface) {
 445                         $sql['where'][] = '(';
 446                         $this->parseConstraint($constraint->getConstraint1(), $source, $sql, $parameters, $boundVariableValues);
 447                         $sql['where'][] = ' OR ';
 448                         $this->parseConstraint($constraint->getConstraint2(), $source, $sql, $parameters, $boundVariableValues);
 449                         $sql['where'][] = ')';
 450                 } elseif ($constraint instanceof Tx_Extbase_Persistence_QOM_NotInterface) {
 451                         $sql['where'][] = 'NOT (';
 452                         $this->parseConstraint($constraint->getConstraint(), $source, $sql, $parameters, $boundVariableValues);
 453                         $sql['where'][] = ')';
 454                 } elseif ($constraint instanceof Tx_Extbase_Persistence_QOM_ComparisonInterface) {
 455                         $this->parseComparison($constraint, $source, $sql, $parameters, $boundVariableValues);
 456                 } elseif ($constraint instanceof Tx_Extbase_Persistence_QOM_RelatedInterface) {
 457                         $this->parseRelated($constraint, $sql, $parameters, $boundVariableValues);
 458                 }
 459         }
 460
 461         /**
 462          * Parse a Comparison into SQL and parameter arrays.
 463          *
 464          * @param Tx_Extbase_Persistence_QOM_ComparisonInterface $comparison The comparison to parse
 465          * @param Tx_Extbase_Persistence_QOM_SourceInterface $source The source
 466          * @param array &$sql SQL query parts to add to
 467          * @param array &$parameters Parameters to bind to the SQL
 468          * @param array $boundVariableValues The bound variables in the query and their values
 469          * @return void
 470          */
 471         protected function parseComparison(Tx_Extbase_Persistence_QOM_ComparisonInterface $comparison, Tx_Extbase_Persistence_QOM_SourceInterface $source, array &$sql, array &$parameters, array $boundVariableValues) {
 472                 if (!($comparison->getOperand2() instanceof Tx_Extbase_Persistence_QOM_BindVariableValueInterface)) throw new Tx_Extbase_Persistence_Exception('Type of operand is not supported', 1247581135);
 473
 474                 $value = $boundVariableValues[$comparison->getOperand2()->getBindVariableName()];
 475                 $operator = $comparison->getOperator();
 476                 if ($value === NULL) {
 477                         if ($operator === Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_EQUAL_TO) {
 478                                 $operator = self::OPERATOR_EQUAL_TO_NULL;
 479                         } elseif ($operator === Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_NOT_EQUAL_TO) {
 480                                 $operator = self::OPERATOR_NOT_EQUAL_TO_NULL;
 481                         }
 482                 } elseif (is_array($value)) {
 483                         if ($operator === Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_EQUAL_TO) {
 484                                 $operator = self::OPERATOR_IN;
 485                         } elseif ($operator === Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_NOT_EQUAL_TO) {
 486                                 $operator = self::OPERATOR_NOT_IN;
 487                         }
 488                 }
 489                 $parameters[] = $value;
 490
 491                 $this->parseDynamicOperand($comparison->getOperand1(), $operator, $source, $sql, $parameters);
 492         }
 493
 494         /**
 495          * Parse a DynamicOperand into SQL and parameter arrays.
 496          *
 497          * @param Tx_Extbase_Persistence_QOM_DynamicOperandInterface $operand
 498          * @param string $operator One of the JCR_OPERATOR_* constants
 499          * @param Tx_Extbase_Persistence_QOM_SourceInterface $source The source
 500          * @param array &$sql The query parts
 501          * @param array &$parameters The parameters that will replace the markers
 502          * @param string $valueFunction an optional SQL function to apply to the operand value
 503          * @return void
 504          */
 505         protected function parseDynamicOperand(Tx_Extbase_Persistence_QOM_DynamicOperandInterface $operand, $operator, Tx_Extbase_Persistence_QOM_SourceInterface $source, array &$sql, array &$parameters, $valueFunction = NULL) {
 506                 if ($operand instanceof Tx_Extbase_Persistence_QOM_LowerCaseInterface) {
 507                         $this->parseDynamicOperand($operand->getOperand(), $operator, $source, $sql, $parameters, 'LOWER');
 508                 } elseif ($operand instanceof Tx_Extbase_Persistence_QOM_UpperCaseInterface) {
 509                         $this->parseDynamicOperand($operand->getOperand(), $operator, $source, $sql, $parameters, 'UPPER');
 510                 } elseif ($operand instanceof Tx_Extbase_Persistence_QOM_PropertyValueInterface) {
 511                         $tableName = $operand->getSelectorName();
 512                         // FIXME Discuss the translation from propertyName to columnName
 513                         if ($source instanceof Tx_Extbase_Persistence_QOM_SelectorInterface) {
 514                                 $className = $source->getNodeTypeName();
 515                         } else {
 516                                 $className = '';
 517                         }
 518                         $columnName = $this->dataMapper->convertPropertyNameToColumnName($operand->getPropertyName(), $className);
 519                         $operator = $this->resolveOperator($operator);
 520
 521                         if ($valueFunction === NULL) {
 522                                 $constraintSQL .= (!empty($tableName) ? $tableName . '.' : '') . $columnName .  ' ' . $operator . ' ?';
 523                         } else {
 524                                 $constraintSQL .= $valueFunction . '(' . (!empty($tableName) ? $tableName . '.' : '') . $columnName .  ' ' . $operator . ' ?';
 525                         }
 526
 527                         $sql['where'][] = $constraintSQL;
 528                 }
 529         }
 530
 531         /**
 532          * Returns the SQL operator for the given JCR operator type.
 533          *
 534          * @param string $operator One of the JCR_OPERATOR_* constants
 535          * @return string an SQL operator
 536          */
 537         protected function resolveOperator($operator) {
 538                 switch ($operator) {
 539                         case self::OPERATOR_EQUAL_TO_NULL:
 540                                 $operator = 'IS';
 541                                 break;
 542                         case self::OPERATOR_NOT_EQUAL_TO_NULL:
 543                                 $operator = 'IS NOT';
 544                                 break;
 545                         case self::OPERATOR_IN:
 546                                 $operator = 'IN';
 547                                 break;
 548                         case self::OPERATOR_NOT_IN:
 549                                 $operator = 'NOT IN';
 550                                 break;
 551                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_EQUAL_TO:
 552                                 $operator = '=';
 553                                 break;
 554                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_NOT_EQUAL_TO:
 555                                 $operator = '!=';
 556                                 break;
 557                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_LESS_THAN:
 558                                 $operator = '<';
 559                                 break;
 560                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_LESS_THAN_OR_EQUAL_TO:
 561                                 $operator = '<=';
 562                                 break;
 563                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_GREATER_THAN:
 564                                 $operator = '>';
 565                                 break;
 566                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_GREATER_THAN_OR_EQUAL_TO:
 567                                 $operator = '>=';
 568                                 break;
 569                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_OPERATOR_LIKE:
 570                                 $operator = 'LIKE';
 571                                 break;
 572                         default:
 573                                 throw new Tx_Extbase_Persistence_Exception('Unsupported operator encountered.', 1242816073);
 574                 }
 575
 576                 return $operator;
 577         }
 578
 579         /**
 580          * Replace query placeholders in a query part by the given
 581          * parameters.
 582          *
 583          * @param string $sqlString The query part with placeholders
 584          * @param array $parameters The parameters
 585          * @return string The query part with replaced placeholders
 586          */
 587         protected function replacePlaceholders(&$sqlString, array $parameters) {
 588                 // TODO profile this method again
 589                 if (substr_count($sqlString, '?') !== count($parameters)) throw new Tx_Extbase_Persistence_Exception('The number of question marks to replace must be equal to the number of parameters.', 1242816074);
 590                 $offset = 0;
 591                 foreach ($parameters as $parameter) {
 592                         $markPosition = strpos($sqlString, '?', $offset);
 593                         if ($markPosition !== FALSE) {
 594                                 if ($parameter === NULL) {
 595                                         $parameter = 'NULL';
 596                                 } elseif (is_array($parameter)) {
 597                                         $items = array();
 598                                         foreach ($parameter as $item) {
 599                                                 $items[] = $this->databaseHandle->fullQuoteStr($item, 'foo');
 600                                         }
 601                                         $parameter = '(' . implode(',', $items) . ')';
 602                                 } else {
 603                                         $parameter = $this->databaseHandle->fullQuoteStr($parameter, 'foo'); // FIXME This may not work with DBAL; check this
 604                                 }
 605                                 $sqlString = substr($sqlString, 0, $markPosition) . $parameter . substr($sqlString, $markPosition + 1);
 606                         }
 607                         $offset = $markPosition + strlen($parameter);
 608                 }
 609         }
 610
 611         /**
 612          * Builds the enable fields statement
 613          *
 614          * @param string $tableName The database table name
 615          * @param array &$sql The query parts
 616          * @return void
 617          */
 618         protected function addEnableFieldsStatement($tableName, array &$sql) {
 619                 if (is_array($GLOBALS['TCA'][$tableName]['ctrl'])) {
 620                         if (TYPO3_MODE === 'FE') {
 621                                 $statement = $GLOBALS['TSFE']->sys_page->enableFields($tableName);
 622                         } else { // TYPO3_MODE === 'BE'
 623                                 $statement = t3lib_BEfunc::deleteClause($tableName);
 624                                 $statement .= t3lib_BEfunc::BEenableFields($tableName);
 625                         }
 626                         if(!empty($statement)) {
 627                                 $statement = substr($statement, 5);
 628                                 $sql['additionalWhereClause'][] = $statement;
 629                         }
 630                 }
 631         }
 632
 633         /**
 634          * Builds the page ID checking statement
 635          *
 636          * @param string $tableName The database table name
 637          * @param array &$sql The query parts
 638          * @return void
 639          */
 640         protected function addPageIdStatement($tableName, array &$sql) {
 641                 if (empty($this->tableInformationCache[$tableName]['columnNames'])) {
 642                         $this->tableInformationCache[$tableName]['columnNames'] = $this->databaseHandle->admin_get_fields($tableName);
 643                 }
 644                 if (is_array($GLOBALS['TCA'][$tableName]['ctrl']) && array_key_exists('pid', $this->tableInformationCache[$tableName]['columnNames'])) {
 645                         $extbaseFrameworkConfiguration = Tx_Extbase_Dispatcher::getExtbaseFrameworkConfiguration();
 646                         $sql['additionalWhereClause'][] = $tableName . '.pid IN (' . implode(', ', t3lib_div::intExplode(',', $extbaseFrameworkConfiguration['persistence']['storagePid'])) . ')';
 647                 }
 648         }
 649
 650         /**
 651          * Transforms orderings into SQL.
 652          *
 653          * @param array $orderings Ann array of orderings (Tx_Extbase_Persistence_QOM_Ordering)
 654          * @param Tx_Extbase_Persistence_QOM_SourceInterface $source The source
 655          * @param array &$sql The query parts
 656          * @return void
 657          */
 658         protected function parseOrderings(array $orderings, Tx_Extbase_Persistence_QOM_SourceInterface $source, array &$sql) {
 659                 foreach ($orderings as $ordering) {
 660                         $operand = $ordering->getOperand();
 661                         $order = $ordering->getOrder();
 662                         if ($operand instanceof Tx_Extbase_Persistence_QOM_PropertyValue) {
 663                                 switch ($order) {
 664                                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_ORDER_ASCENDING:
 665                                                 $order = 'ASC';
 666                                                 break;
 667                                         case Tx_Extbase_Persistence_QOM_QueryObjectModelConstantsInterface::JCR_ORDER_DESCENDING:
 668                                                 $order = 'DESC';
 669                                                 break;
 670                                         default:
 671                                                 throw new Tx_Extbase_Persistence_Exception_UnsupportedOrder('Unsupported order encountered.', 1242816074);
 672                                 }
 673                                 $tableName = $operand->getSelectorName();
 674                                 $className = '';
 675                                 if ($source instanceof Tx_Extbase_Persistence_QOM_SelectorInterface) {
 676                                         $className = $source->getNodeTypeName();
 677                                 }
 678                                 $columnName = $this->dataMapper->convertPropertyNameToColumnName($operand->getPropertyName(), $className);
 679                                 if (strlen($tableName) > 0) {
 680                                         $sql['orderings'][] = $tableName . '.' . $columnName . ' ' . $order;
 681                                 } else {
 682                                         $sql['orderings'][] = $columnName . ' ' . $order;
 683                                 }
 684                         }
 685                 }
 686         }
 687
 688         /**
 689          * Transforms limit and offset into SQL
 690          *
 691          * @param int $limit
 692          * @param int $offset
 693          * @param array &$sql
 694          * @return void
 695          */
 696         protected function parseLimitAndOffset($limit, $offset, array &$sql) {
 697                 if ($limit !== NULL && $offset !== NULL) {
 698                         $sql['limit'] = $offset . ', ' . $limit;
 699                 } elseif ($limit !== NULL) {
 700                         $sql['limit'] = $limit;
 701                 }
 702         }
 703
 704         /**
 705          * Transforms a Resource from a database query to an array of rows. Performs the language and
 706          * workspace overlay before.
 707          *
 708          * @param Tx_Extbase_Persistence_QOM_SourceInterface $source The source (selector od join)
 709          * @param resource $result The result
 710          * @return array The result as an array of rows (tuples)
 711          */
 712         protected function getRowsFromResult(Tx_Extbase_Persistence_QOM_SourceInterface $source, $result) {
 713                 $rows = array();
 714                 while ($row = $this->databaseHandle->sql_fetch_assoc($result)) {
 715                         if      ($source instanceof Tx_Extbase_Persistence_QOM_SelectorInterface) {
 716                                 // FIXME The overlay is only performed if we query a single table; no joins
 717                                 $row = $this->doLanguageAndWorkspaceOverlay($source->getSelectorName(), $row);
 718                         }
 719                         if (is_array($row)) {
 720                                 // TODO Check if this is necessary, maybe the last line is enough
 721                                 $arrayKeys = range(0,count($row));
 722                                 array_fill_keys($arrayKeys, $row);
 723                                 $rows[] = $row;
 724                         }
 725                 }
 726                 return $rows;
 727         }
 728
 729         /**
 730          * Performs workspace and language overlay on the given row array. The language and workspace id is automatically
 731          * detected (depending on FE or BE context). You can also explicitly set the language/workspace id.
 732          *
 733          * @param Tx_Extbase_Persistence_Mapper_DataMap $dataMap
 734          * @param array $row The row array (as reference)
 735          * @param string $languageUid The language id
 736          * @param string $workspaceUidUid The workspace id
 737          * @return void
 738          */
 739         protected function doLanguageAndWorkspaceOverlay($tableName, array $row, $languageUid = NULL, $workspaceUid = NULL) {
 740                 if (!($this->pageSelectObject instanceof t3lib_pageSelect)) {
 741                         if (TYPO3_MODE == 'FE') {
 742                                 if (is_object($GLOBALS['TSFE'])) {
 743                                         $this->pageSelectObject = $GLOBALS['TSFE']->sys_page;
 744                                         if ($languageUid === NULL) {
 745                                                 $languageUid = $GLOBALS['TSFE']->sys_language_content;
 746                                         }
 747                                 } else {
 748                                         require_once(PATH_t3lib . 'class.t3lib_page.php');
 749                                         $this->pageSelectObject = t3lib_div::makeInstance('t3lib_pageSelect');
 750                                         if ($languageUid === NULL) {
 751                                                 $languageUid = intval(t3lib_div::_GP('L'));
 752                                         }
 753                                 }
 754                                 if ($workspaceUid !== NULL) {
 755                                         $this->pageSelectObject->versioningWorkspaceId = $workspaceUid;
 756                                 }
 757                         } else {
 758                                 require_once(PATH_t3lib . 'class.t3lib_page.php');
 759                                 $this->pageSelectObject = t3lib_div::makeInstance( 't3lib_pageSelect' );
 760                                 if ($workspaceUid === NULL) {
 761                                         $workspaceUid = $GLOBALS['BE_USER']->workspace;
 762                                 }
 763                                 $this->pageSelectObject->versioningWorkspaceId = $workspaceUid;
 764                         }
 765                 }
 766
 767                 $this->pageSelectObject->versionOL($tableName, $row, TRUE);
 768                 $row = $this->pageSelectObject->getRecordOverlay($tableName, $row, $languageUid, ''); //'hideNonTranslated'
 769                 // TODO Skip if empty languageoverlay (languagevisibility)
 770                 return $row;
 771         }
 772
 773         /**
 774          * Checks if there are SQL errors in the last query, and if yes, throw an exception.
 775          *
 776          * @return void
 777          * @throws Tx_Extbase_Persistence_Storage_Exception_SqlError
 778          */
 779         protected function checkSqlErrors() {
 780                 $error = $this->databaseHandle->sql_error();
 781                 if ($error !== '') {
 782                         throw new Tx_Extbase_Persistence_Storage_Exception_SqlError($error, 1247602160);
 783                 }
 784         }
 785
 786         /**
 787          * Clear the TYPO3 page cache for the given record.
 788          * If the record lies on a page, then we clear the cache of this page.
 789          * If the record has no PID column, we clear the cache of the current page as best-effort.
 790          *
 791          * Much of this functionality is taken from t3lib_tcemain::clear_cache() which unfortunately only works with logged-in BE user.
 792          *
 793          * @param $tableName Table name of the record
 794          * @param $uid UID of the record
 795          * @return void
 796          */
 797         protected function clearPageCache($tableName, $uid) {
 798                 $extbaseSettings = Tx_Extbase_Dispatcher::getExtbaseFrameworkConfiguration();
 799                 if (isset($extbaseSettings['persistence']['enableAutomaticCacheClearing']) && $extbaseSettings['persistence']['enableAutomaticCacheClearing'] === '1') {
 800                 } else {
 801                         // if disabled, return
 802                         return;
 803                 }
 804
 805                 $pageIdsToClear = array();
 806                 $storagePage = NULL;
 807
 808                 $columns = $this->databaseHandle->admin_get_fields($tableName);
 809                 if (array_key_exists('pid', $columns)) {
 810                         $result = $this->databaseHandle->exec_SELECTquery('pid', $tableName, 'uid='.intval($uid));
 811                         if ($row = $this->databaseHandle->sql_fetch_assoc($result))     {
 812                                 $storagePage = $row['pid'];
 813                                 $pageIdsToClear[] = $storagePage;
 814                         }
 815                 } elseif (isset($GLOBALS['TSFE'])) {
 816                         // No PID column - we can do a best-effort to clear the cache of the current page if in FE
 817                         $storagePage = $GLOBALS['TSFE']->id;
 818                         $pageIdsToClear[] = $storagePage;
 819                 }
 820
 821                 if ($storagePage === NULL) {
 822                         return;
 823                 }
 824                 if (!isset($this->pageTSConfigCache[$storagePage])) {
 825                         $this->pageTSConfigCache[$storagePage] = t3lib_BEfunc::getPagesTSconfig($storagePage);
 826                 }
 827                 if (isset($this->pageTSConfigCache[$storagePage]['TCEMAIN.']['clearCacheCmd'])) {
 828                         $clearCacheCommands = t3lib_div::trimExplode(',',strtolower($this->pageTSConfigCache[$storagePage]['TCEMAIN.']['clearCacheCmd']),1);
 829                         $clearCacheCommands = array_unique($clearCacheCommands);
 830                         foreach ($clearCacheCommands as $clearCacheCommand)     {
 831                                 if (t3lib_div::testInt($clearCacheCommand))     {
 832                                         $pageIdsToClear[] = $clearCacheCommand;
 833                                 }
 834                         }
 835                 }
 836
 837                 // TODO check if we can hand this over to the Dispatcher to clear the page only once, this will save around 10% time while inserting and updating
 838                 Tx_Extbase_Utility_Cache::clearPageCache($pageIdsToClear);
 839         }
 840 }
 841
 842 ?>