Automattic / jetpack

		$wpdb->queries = array();

		switch( $object_type ) {

			case "posts":

				$object_count = $this->post_count( null, $start_id, $end_id );

				$object_table = $wpdb->posts;

				$id_field = 'ID';

				$checksum_method = array( $this, 'posts_checksum' );

				break;

			case "comments":

				$object_count = $this->comment_count( null, $start_id, $end_id );

				$object_table = $wpdb->comments;

				$id_field = 'ID';

				$checksum_method = array( $this, 'posts_checksum' );

				break;

			case "comments":

				$object_count = $this->comment_count( null, $start_id, $end_id );

				$object_table = $wpdb->comments;

				$id_field = 'comment_ID';

				$checksum_method = array( $this, 'comments_checksum' );

				break;

			default:

				return false;

		}