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function _update_cache_clear in Drupal 6

Same name and namespace in other branches

7 modules/update/update.module \_update_cache_clear()

Invalidates specific cached data relating to update status.

Parameters

$cid: Optional cache ID of the record to clear from the private update module cache. If empty, all records will be cleared from the table.

Related topics

Private update status cache system: We specifically do NOT use the core cache API for saving the fetched data about available updates. It is vitally important that this cache is only cleared when we're populating it after successfully fetching new available update data. Usage of…

4 calls to _update_cache_clear()

update_flush_caches in modules/update/update.module: Implementation of hook_flush_caches().
update_invalidate_cache in modules/update/update.module: Invalidates all cached data relating to update status.
update_project_cache in modules/update/update.compare.inc: Retrieve data from {cache_update} or empty the cache when necessary.
_update_refresh in modules/update/update.fetch.inc: Fetch project info via XML from a central server.

File

modules/update/update.module, line 585: The "Update status" module checks for available updates of Drupal core and any installed contributed modules and themes. It warns site administrators if newer releases are available via the system status report (admin/reports/status), the…

Code

function _update_cache_clear($cid = NULL) {
  if (empty($cid)) {
    db_query("TRUNCATE TABLE {cache_update}");
  }
  else {
    db_query("DELETE FROM {cache_update} WHERE cid = '%s'", $cid);
  }
}