node_delete() is not deleting nodes

Question

I'm trying to use a drush function to flush out all of the drealty module's nodes in my drupal 6 install. However, something is causing a memory leak and the nodes are not being deleted after node_delete is called. What can I do?

Here is the memory exhausted error:

drush rets-flush
PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 71 bytes) in /home/directory/public_html/sites/all/modules/filefield/field_file.inc on line 300
Drush command terminated abnormally due to an unrecoverable error.   [error]
Error: Allowed memory size of 134217728 bytes exhausted (tried to
allocate 71 bytes) in
/home/directory/public_html/sites/all/modules/filefield/field_file.inc,
line 300

Here is the drush rets-flush function:

function drush_drealty_rets_flush() {
  set_time_limit(0);

  $result = db_query("SELECT nid FROM {node} WHERE type = 'drealty_property' OR type = 'drealty_agent' OR type = 'drealty_office' OR type = 'drealty_open_house'", $conid);

  $count = 0;
  while ($nid = db_fetch_object($result)) {
    node_delete($nid->nid);
    drush_log(dt('Deleting node id: @nid. ', array('@nid' => $nid->nid)));
    $count++;
  }
  drush_log(dt('Deleted @count nodes', array('@count' => $count)), 'success');
}

There are about 5000 records total.

Answer 1

You may find that you still run out of memory if you have enough nodes of the drealty type. This is because node_delete() calls node_load(), and that adds each node to a static cache. If you run into this, simply call node_load(NULL, NULL, TRUE) once every 50 - 100 iterations.

Answer 2

Found the answer myself. I had to run drush as admin:

drush -u admin rets-flush

I thought drush ran as admin automatically, but I guess not.