Distance DQL/UDF

Distance.php

<?php

namespace ChefsClub\ApiBundle\Component\Doctrine\DQL;

use Doctrine\ORM\Query\AST\Functions\FunctionNode;
use Doctrine\ORM\Query\AST\InputParameter;
use Doctrine\ORM\Query\Lexer;
use Doctrine\ORM\Query\Parser;
use Doctrine\ORM\Query\SqlWalker;

/**
 * Calculates distance between two points in meters
 * Ps: lat and lng MUST BE in signed degrees !
 * @example DISTANCE(lat, lng, lat_param, lng_param).
 * @see https://github.com/beberlei/DoctrineExtensions
 */
class Distance extends FunctionNode
{

    /**
     * @var InputParameter
     */
    private $latitude_field_value;
    
    /**
     * @var InputParameter
     */
    private $longitude_field_value;
    
    /**
     * @var InputParameter
     */
    private $lat_value;
    
    /**
     * @var InputParameter
     */
    private $lng_value;

    /**
     * DISTANCE(lat_field(1), lng_field(2), lat(3), lng(4))
     * @param Parser $Parser
     */
    public function parse(Parser $Parser)
    {
        $Parser->match(Lexer::T_IDENTIFIER);
        $Parser->match(Lexer::T_OPEN_PARENTHESIS);

//            $this->latitude_field_value = $Parser->InputParameter();
//            $Parser->match(Lexer::T_COMMA);
//
//            $this->longitude_field_value = $Parser->InputParameter();
//            $Parser->match(Lexer::T_COMMA);
        
            $this->lat_value = $Parser->InputParameter();
            $Parser->match(Lexer::T_COMMA);

            $this->lng_value = $Parser->InputParameter();

        $Parser->match(Lexer::T_CLOSE_PARENTHESIS);
    }

    public function getSql(SqlWalker $sqlWalker)
    {   
        return  
            'ROUND(
		ACOS(
                    SIN(
                        RADIANS(lat)) *
                        SIN(RADIANS('.$this->lat_value->dispatch($sqlWalker).')
                    )
                    
                    + 
                    
                    COS(RADIANS(lat)) * 

                    COS(RADIANS('.$this->lat_value->dispatch($sqlWalker).')) * 

                    COS(
                        RADIANS(lng) -
                        RADIANS('.$this->lng_value->dispatch($sqlWalker).')
                    )

		) * 6371000
            )'
        ;
    }
    
}

entityRepo.php

$QueryBuilder->addSelect('DISTANCE(:Lat, :Lng) as distance')->setParameters([
    'Lat' => $ArrayParams['Lat'],
    'Lng' => $ArrayParams['Lng']
]);

//Se o php das columas no parse() for reescrito assim, a query fica perfeita, mas quando o doctrine vai //injetar os parâmetros da erro, pois na verdade, ficam parâmetros à menos na query....

$this->latitude_field_value = $Parser->Literal();
$Parser->match(Lexer::T_COMMA);

$this->longitude_field_value = $Parser->Literal();
$Parser->match(Lexer::T_COMMA);