Function table_rescan

src/include/access/tableam.h:1203–1208

* Restart a relation scan. */

 * Restart a relation scan.
 */
static inline void
table_rescan(TableScanDesc scan,
			 struct ScanKeyData *key)
{
	scan->rs_rd->rd_tableam->scan_rescan(scan, key, false, false, false, false);
}

/*
 * Restart a relation scan after changing params.