Add a list of cache tables to be cleared.
This hook allows your module to add cache table names to the list of cache tables that will be cleared by the Clear button on the Performance page or whenever drupal_flush_all_caches is invoked.
An array of cache table names.
Note: this list is generated by pattern matching, so it may include some functions that are not actually implementations of this hook.
function hook_flush_caches() {
return array(
'cache_example',
);
}