BP_Messages_Thread::update_tables()

	public static function update_tables() {
		global $wpdb;

		$bp_prefix = bp_core_get_table_prefix();
		$errors    = false;
		$threads   = $wpdb->get_results( "SELECT * FROM {$bp_prefix}bp_messages_threads" );

		// Nothing to update, just return true to remove the table.
		if ( empty( $threads ) ) {
			return true;
		}

		$bp = buddypress();

		foreach( (array) $threads as $thread ) {
			$message_ids = maybe_unserialize( $thread->message_ids );

			if ( ! empty( $message_ids ) ) {
				$message_ids = implode( ',', $message_ids );

				// Add the thread_id to the messages table.
				if ( ! $wpdb->query( $wpdb->prepare( "UPDATE {$bp->messages->table_name_messages} SET thread_id = %d WHERE id IN ({$message_ids})", $thread->id ) ) ) {
					$errors = true;
				}
			}
		}

		return (bool) ! $errors;
	}