comment.install

<?php

/**
 * Implementation of hook_enable().
 */
function comment_enable() {

  // Insert records into the node_comment_statistics for nodes that are missing.
  db_query_temporary("SELECT n.nid, n.changed, n.uid FROM {node} n LEFT JOIN {node_comment_statistics} c ON n.nid = c.nid WHERE c.comment_count IS NULL", 'missing_nids');
  db_query("INSERT INTO {node_comment_statistics} (nid, last_comment_timestamp, last_comment_name, last_comment_uid, comment_count) SELECT n.nid, n.changed, NULL, n.uid, 0 FROM missing_nids n");
}

/**
 * Changed node_comment_statistics to use node->changed to avoid future
 * timestamps.
 */
function comment_update_1() {

  // Change any future last comment timestamps to now.
  db_query('UPDATE {node_comment_statistics} SET last_comment_timestamp = %d WHERE last_comment_timestamp > %d', time(), time());

  // Unstuck node indexing timestamp if needed.
  if (($last = variable_get('node_cron_last', FALSE)) !== FALSE) {
    variable_set('node_cron_last', min(time(), $last));
  }
  return array();
}