Deleting all nodes of a specific type in Drupal

gistfile1.php

<?php
/**
 * Mass delete nodes of $nodetype
 * put the file in the Drupal root and adjust $nodetype and $limit as you like
 *
 * Mostly borrowed from: http://stream.zerolab.org/post/917260717/mass-delete-nodes-in-drupal
 * and http://www.stonemind.net/blog/2009/01/20/headless-drupal-using-drupals-api-to-batch-script-your-drupal-site/
 *
 */

error_reporting(E_ALL);
require_once './includes/bootstrap.inc';
drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);

$nodetype = "feed_ical_item";
$results = db_query("SELECT nid FROM {node} WHERE type='%s'", $nodetype);
$count = 0;

while ($result = db_fetch_object($results)) {

  db_query('DELETE FROM {node} WHERE nid = %d', $result->nid);
  db_query('DELETE FROM {node_revisions} WHERE nid = %d', $result->nid);

  // Call the node-specific callback (if any):
  node_invoke($result, 'delete');
  node_invoke_nodeapi($result, 'delete');

  // Clear the page and block caches.
  cache_clear_all();

  // Remove this node from the search index if needed.
  if (function_exists('search_wipe')) {
    search_wipe($result->nid, 'node');
  }
  watchdog('content', '@type: deleted %title.', array('@type' => $result->type, '%title' => $result->title));
  drupal_set_message(t('@type %title has been deleted.', array('@type' => node_get_types('name', $result), '%title' => $result->title)));

  print 'Deleted node: ' . $result->nid . '<br />';
  $count++;
}

print "Total deleted: $count";
?>