Problème relation (innerJoin) symfony

<?php

namespace TEST\ServiceBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Table1
 *
 * @ORM\Table(name="table1")
 * @ORM\Entity(repositoryClass="TEST\ServiceBundle\Repository\Table1Repository")
 */
class Table1
{
    /**
     * @var int
     *
     * @ORM\Column(name="id_tab1", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var int
     *
     * @ORM\Column(name="table2_id", type="integer")
     * @ORM\OneToMany(targetEntity="ServiceBundle\Entity\Table2", mappedBy="table1Id")
     */
    private $table2Id;

    /**
     * @var string
     *
     * @ORM\Column(name="val_tab1", type="string", length=255)
     */
    private $valTab1;


    /**
     * Get id
     *
     * @return int
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set valTab1
     *
     * @param string $valTab1
     *
     * @return Table1
     */
    public function setValTab1($valTab1)
    {
        $this->valTab1 = $valTab1;

        return $this;
    }

    /**
     * Get valTab1
     *
     * @return string
     */
    public function getValTab1()
    {
        return $this->valTab1;
    }
}

<?php

namespace TEST\ServiceBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * Table2
 *
 * @ORM\Table(name="table2")
 * @ORM\Entity(repositoryClass="TEST\ServiceBundle\Repository\Table2Repository")
 */
class Table2
{
    /**
     * @var int
     *
     * @ORM\Column(name="id_tab2", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="val_tab2", type="string", length=255)
     */
    private $valTab2;

    /**
     * @var int
     *
     * @ORM\Column(name="table1_id", type="integer")
     * @ORM\ManyToOne(targetEntity="ServiceBundle\Entity\Table1", inversedBy="table2Id")
     */
    private $table1Id;


    /**
     * Get id
     *
     * @return int
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set valTab2
     *
     * @param string $valTab2
     *
     * @return Table2
     */
    public function setValTab2($valTab2)
    {
        $this->valTab2 = $valTab2;

        return $this;
    }

    /**
     * Get valTab2
     *
     * @return string
     */
    public function getValTab2()
    {
        return $this->valTab2;
    }

    /**
     * Set table1Id
     *
     * @param integer $table1Id
     *
     * @return Table2
     */
    public function setTable1Id($table1Id)
    {
        $this->table1Id = $table1Id;

        return $this;
    }

    /**
     * Get table1Id
     *
     * @return int
     */
    public function getTable1Id()
    {
        return $this->table1Id;
    }
}

<?php

namespace TEST\ServiceBundle\Repository;

/**
 * Table1Repository
 *
 * This class was generated by the Doctrine ORM. Add your own custom
 * repository methods below.
 */
class Table1Repository extends \Doctrine\ORM\EntityRepository
{
	public function test(){
		$qb = $this->_em->createQueryBuilder();
        $qb->select('t2')
        	->from('ServiceBundle:Table2', 't2')
        	->innerJoin('t2.table1_id', 't1')
        ;

        	//dump($qb->getQuery());
 
        return $qb->getQuery()->getResult();
	}
}

-- phpMyAdmin SQL Dump
-- version 4.7.4
-- https://www.phpmyadmin.net/
--
-- Hôte : 127.0.0.1:3306
-- Généré le :  mar. 10 juil. 2018 à 20:28
-- Version du serveur :  5.7.19
-- Version de PHP :  7.1.9

SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
SET AUTOCOMMIT = 0;
START TRANSACTION;
SET time_zone = "+00:00";


/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8mb4 */;

--
-- Base de données :  `inner`
--

-- --------------------------------------------------------

--
-- Structure de la table `table1`
--

DROP TABLE IF EXISTS `table1`;
CREATE TABLE IF NOT EXISTS `table1` (
  `id_tab1` int(11) NOT NULL AUTO_INCREMENT,
  `val_tab1` varchar(255) NOT NULL,
  PRIMARY KEY (`id_tab1`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=latin1;

--
-- Déchargement des données de la table `table1`
--

INSERT INTO `table1` (`id_tab1`, `val_tab1`) VALUES
(1, 'test1'),
(2, 'test1(2)');

-- --------------------------------------------------------

--
-- Structure de la table `table2`
--

DROP TABLE IF EXISTS `table2`;
CREATE TABLE IF NOT EXISTS `table2` (
  `id_tab2` int(11) NOT NULL AUTO_INCREMENT,
  `val_tab2` varchar(255) NOT NULL,
  `table1_id` int(11) NOT NULL,
  PRIMARY KEY (`id_tab2`),
  KEY `fkey` (`table1_id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=latin1;

--
-- Déchargement des données de la table `table2`
--

INSERT INTO `table2` (`id_tab2`, `val_tab2`, `table1_id`) VALUES
(1, 'val 2', 1),
(2, 'val 2(2)', 2);

--
-- Contraintes pour les tables déchargées
--

--
-- Contraintes pour la table `table2`
--
ALTER TABLE `table2`
  ADD CONSTRAINT `fkey` FOREIGN KEY (`table1_id`) REFERENCES `table1` (`id_tab1`);
COMMIT;

/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;