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<?php
/*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the MIT license. For more information, see
* <http://www.doctrine-project.org>.
*/
namespace Doctrine\ORM\Query\Exec;
use Doctrine\DBAL\Connection;
use Doctrine\DBAL\Types\Type;
use Doctrine\ORM\Query\AST;
use Doctrine\ORM\Query\AST\DeleteStatement;
use Doctrine\ORM\Query\SqlWalker;
use Doctrine\ORM\Utility\PersisterHelper;
use Throwable;
/**
* Executes the SQL statements for bulk DQL DELETE statements on classes in
* Class Table Inheritance (JOINED).
*
* @author Roman Borschel <roman@code-factory.org>
* @license http://www.opensource.org/licenses/mit-license.php MIT
* @link http://www.doctrine-project.org
* @since 2.0
*/
class MultiTableDeleteExecutor extends AbstractSqlExecutor
{
/**
* @var string
*/
private $_createTempTableSql;
/**
* @var string
*/
private $_dropTempTableSql;
/**
* @var string
*/
private $_insertSql;
/**
* Initializes a new <tt>MultiTableDeleteExecutor</tt>.
*
* Internal note: Any SQL construction and preparation takes place in the constructor for
* best performance. With a query cache the executor will be cached.
*
* @param DeleteStatement $AST The root AST node of the DQL query.
* @param SqlWalker $sqlWalker The walker used for SQL generation from the AST.
*/
public function __construct(AST\Node $AST, $sqlWalker)
{
$em = $sqlWalker->getEntityManager();
$conn = $em->getConnection();
$platform = $conn->getDatabasePlatform();
$quoteStrategy = $em->getConfiguration()->getQuoteStrategy();
$primaryClass = $em->getClassMetadata($AST->deleteClause->abstractSchemaName);
$primaryDqlAlias = $AST->deleteClause->aliasIdentificationVariable;
$rootClass = $em->getClassMetadata($primaryClass->rootEntityName);
$tempTable = $platform->getTemporaryTableName($rootClass->getTemporaryIdTableName());
$idColumnNames = $rootClass->getIdentifierColumnNames();
$idColumnList = implode(', ', $idColumnNames);
// 1. Create an INSERT INTO temptable ... SELECT identifiers WHERE $AST->getWhereClause()
$sqlWalker->setSQLTableAlias($primaryClass->getTableName(), 't0', $primaryDqlAlias);
$this->_insertSql = 'INSERT INTO ' . $tempTable . ' (' . $idColumnList . ')'
. ' SELECT t0.' . implode(', t0.', $idColumnNames);
$rangeDecl = new AST\RangeVariableDeclaration($primaryClass->name, $primaryDqlAlias);
$fromClause = new AST\FromClause([new AST\IdentificationVariableDeclaration($rangeDecl, null, [])]);
$this->_insertSql .= $sqlWalker->walkFromClause($fromClause);
// Append WHERE clause, if there is one.
if ($AST->whereClause) {
$this->_insertSql .= $sqlWalker->walkWhereClause($AST->whereClause);
}
// 2. Create ID subselect statement used in DELETE ... WHERE ... IN (subselect)
$idSubselect = 'SELECT ' . $idColumnList . ' FROM ' . $tempTable;
// 3. Create and store DELETE statements
$classNames = array_merge($primaryClass->parentClasses, [$primaryClass->name], $primaryClass->subClasses);
foreach (array_reverse($classNames) as $className) {
$tableName = $quoteStrategy->getTableName($em->getClassMetadata($className), $platform);
$this->_sqlStatements[] = 'DELETE FROM ' . $tableName
. ' WHERE (' . $idColumnList . ') IN (' . $idSubselect . ')';
}
// 4. Store DDL for temporary identifier table.
$columnDefinitions = [];
foreach ($idColumnNames as $idColumnName) {
$columnDefinitions[$idColumnName] = [
'notnull' => true,
'type' => Type::getType(PersisterHelper::getTypeOfColumn($idColumnName, $rootClass, $em)),
];
}
$this->_createTempTableSql = $platform->getCreateTemporaryTableSnippetSQL() . ' ' . $tempTable . ' ('
. $platform->getColumnDeclarationListSQL($columnDefinitions) . ')';
$this->_dropTempTableSql = $platform->getDropTemporaryTableSQL($tempTable);
}
/**
* {@inheritDoc}
*
* @return int
*/
public function execute(Connection $conn, array $params, array $types)
{
// Create temporary id table
$conn->executeUpdate($this->_createTempTableSql);
try {
// Insert identifiers
$numDeleted = $conn->executeUpdate($this->_insertSql, $params, $types);
// Execute DELETE statements
foreach ($this->_sqlStatements as $sql) {
$conn->executeUpdate($sql);
}
} catch (Throwable $exception) {
// FAILURE! Drop temporary table to avoid possible collisions
$conn->executeUpdate($this->_dropTempTableSql);
// Re-throw exception
throw $exception;
}
// Drop temporary table
$conn->executeUpdate($this->_dropTempTableSql);
return $numDeleted;
}
}
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