GroupByNumeric.php

1. 8.x drupal/core/modules/views/lib/Drupal/views/Plugin/views/argument/GroupByNumeric.php
2. 8.x drupal/core/modules/views/lib/Drupal/views/Plugin/views/sort/GroupByNumeric.php
3. 8.x drupal/core/modules/views/lib/Drupal/views/Plugin/views/filter/GroupByNumeric.php

<?php

/**
 * @file
 * Definition of Drupal\views\Plugin\views\sort\GroupByNumeric.
 */
namespace Drupal\views\Plugin\views\sort;

use Drupal\Component\Annotation\PluginID;
use Drupal\views\Plugin\views\display\DisplayPluginBase;
use Drupal\views\ViewExecutable;

/**
 * Handler for GROUP BY on simple numeric fields.
 *
 * @PluginID("groupby_numeric")
 */
class GroupByNumeric extends SortPluginBase {

  /**
   * Overrides \Drupal\views\Plugin\views\HandlerBase::init().
   */
  public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
    parent::init($view, $display, $options);

    // Initialize the original handler.
    $this->handler = views_get_handler($options, 'sort');
    $this->handler
      ->init($view, $display, $options);
  }

  /**
   * Called to add the field to a query.
   */
  public function query() {
    $this
      ->ensureMyTable();
    $params = array(
      'function' => $this->options['group_type'],
    );
    $this->query
      ->addOrderBy($this->tableAlias, $this->realField, $this->options['order'], NULL, $params);
  }
  public function adminLabel($short = FALSE) {
    return $this
      ->getField(parent::adminLabel($short));
  }

}