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15 * This software consists of voluntary contributions made by many individuals
16 * and is licensed under the MIT license. For more information, see
17 * <http://www.doctrine-project.org>.
20 namespace Doctrine\ORM\Query\AST\Functions;
22 use Doctrine\ORM\Query\SqlWalker;
23 use Doctrine\ORM\Query\QueryException;
26 * "DATE_ADD(date1, interval, unit)"
29 * @link www.doctrine-project.org
31 * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
32 * @author Benjamin Eberlei <kontakt@beberlei.de>
34 class DateSubFunction extends DateAddFunction
36 public function getSql(SqlWalker $sqlWalker)
38 switch (strtolower($this->unit->value)) {
40 return $sqlWalker->getConnection()->getDatabasePlatform()->getDateSubDaysExpression(
41 $this->firstDateExpression->dispatch($sqlWalker),
42 $this->intervalExpression->dispatch($sqlWalker)
46 return $sqlWalker->getConnection()->getDatabasePlatform()->getDateSubMonthExpression(
47 $this->firstDateExpression->dispatch($sqlWalker),
48 $this->intervalExpression->dispatch($sqlWalker)
52 throw QueryException::semanticalError(
53 'DATE_SUB() only supports units of type day and month.'