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<?php
declare(strict_types=1);
namespace MartinGeorgiev\Doctrine\ORM\Query\AST\Functions\Ltree;
use MartinGeorgiev\Doctrine\ORM\Query\AST\Functions\BaseVariadicFunction;
/**
* Implementation of PostgreSQL subpath function.
*
* Returns subpath of ltree starting at position offset, with length len.
* If offset is negative, subpath starts that far from the end of the path.
* If len is negative, leaves that many labels off the end of the path.
* @see https://www.postgresql.org/docs/current/ltree.html#LTREE-FUNCTIONS
* @since 3.5
* @author Martin Georgiev <[email protected]>
* @example Using it in DQL: "SELECT SUBPATH(e.path, 0, 2) FROM Entity e"
* Returns ltree, subpath starting at position offset, with length len.
*/
class Subpath extends BaseVariadicFunction
{
protected function getNodeMappingPattern(): array
return ['StringPrimary,SimpleArithmeticExpression,SimpleArithmeticExpression'];
}
protected function getFunctionName(): string
return 'subpath';
protected function getMinArgumentCount(): int
return 2;
protected function getMaxArgumentCount(): int
return 3;
martin-georgiev /
postgresql-for-doctrine
