class CastedIntFieldJoin

class CastedIntFieldJoin extends JoinPluginBase {
  
  /**
   * {@inheritdoc}
   */
  public function buildJoin($select_query, $table, $view_query) {
    if (empty($this->configuration['table formula'])) {
      $right_table = $this->table;
    }
    else {
      $right_table = $this->configuration['table formula'];
    }
    if ($this->leftTable) {
      $left_table = $view_query->getTableInfo($this->leftTable);
      $left_field = $this->leftFormula ?: "{$left_table['alias']}.{$this->leftField}";
    }
    else {
      // This can be used if left_field is a formula or something. It should be
      // used only *very* rarely.
      $left_field = $this->leftField;
      $left_table = NULL;
    }
    $right_field = "{$table['alias']}.{$this->field}";
    assert(!isset($this->configuration['cast']) || in_array($this->configuration['cast'], [
      'right',
      'left',
    ]));
    if (isset($this->configuration['cast']) && $this->configuration['cast'] === 'left') {
      $left_field = \Drupal::service('views.cast_sql')->getFieldAsInt($left_field);
    }
    else {
      $right_field = \Drupal::service('views.cast_sql')->getFieldAsInt($right_field);
    }
    $condition = "{$left_field} {$this->configuration['operator']} {$right_field}";
    $arguments = [];
    // Tack on the extra.
    if (isset($this->extra)) {
      $this->joinAddExtra($arguments, $condition, $table, $select_query, $left_table);
    }
    $select_query->addJoin($this->type, $right_table, $table['alias'], $condition, $arguments);
  }

}