On Mon, Feb 3, 2020 at 5:33 PM Fujii Masao <masao.fu...@oss.nttdata.com> wrote: > Thanks for explaining that! But heap_beginscan_internal() was really > called in TidScan case? Oh, you are right. Tid Scan started calling table_beginscan from v12 (commit 147e3722f7). So previously(-v11), Tid Scan might never calls heap_beginscan_internal().
Therefore, from v12, Tid scan not only increases the value of seq_scan, but also acquires a predicate lock. Best regards, -- Tatsuhito Kasahara kasahara.tatsuhito _at_ gmail.com
