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20 namespace Doctrine\ORM\Query\AST\Functions;
22 use Doctrine\ORM\Query\Lexer;
25 * "IDENTITY" "(" SingleValuedAssociationPathExpression ")"
28 * @link www.doctrine-project.org
30 * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
31 * @author Benjamin Eberlei <kontakt@beberlei.de>
33 class IdentityFunction extends FunctionNode
35 public $pathExpression;
40 public function getSql(\Doctrine\ORM\Query\SqlWalker $sqlWalker)
42 $dqlAlias = $this->pathExpression->identificationVariable;
43 $assocField = $this->pathExpression->field;
45 $qComp = $sqlWalker->getQueryComponent($dqlAlias);
46 $class = $qComp['metadata'];
47 $assoc = $class->associationMappings[$assocField];
49 $tableAlias = $sqlWalker->getSQLTableAlias($class->getTableName(), $dqlAlias);
51 return $tableAlias . '.' . reset($assoc['targetToSourceKeyColumns']);;
57 public function parse(\Doctrine\ORM\Query\Parser $parser)
59 $parser->match(Lexer::T_IDENTIFIER);
60 $parser->match(Lexer::T_OPEN_PARENTHESIS);
62 $this->pathExpression = $parser->SingleValuedAssociationPathExpression();
64 $parser->match(Lexer::T_CLOSE_PARENTHESIS);