popsu-d7/sites/all/modules/references/node_reference/node_reference.install

<?php

/**
 * @file
 * Install, update and uninstall functions for the node_reference module.
 */

/**
 * Implements hook_field_schema().
 */
function node_reference_field_schema($field) {
  $columns = array(
    'nid' => array(
      'type'     => 'int',
      'unsigned' => TRUE,
      'not null' => FALSE,
    ),
  );
  return array(
    'columns' => $columns,
    'indexes' => array('nid' => array('nid')),
    'foreign keys' => array(
      'nid' => array(
        'table' => 'node',
        'columns' => array('nid' => 'nid'),
      ),
    ),
  );
}

/**
 * Rebuild views data cache (a callabck was renamed).
 */
function node_reference_update_7000() {
  if (function_exists('views_invalidate_cache')) {
    views_invalidate_cache();
  }
}