On Sun, May 1, 2016 at 1:43 AM, Amit Kapila <amit.kapil...@gmail.com> wrote: > On Sun, May 1, 2016 at 12:05 PM, Amit Kapila <amit.kapil...@gmail.com> wrote: >> >> Currently we do the test for old snapshot (TestForOldSnapshot) for hash >> indexes while scanning them. Does this test makes any sense for hash >> indexes considering LSN on hash index will always be zero (as hash indexes >> are not WAL-logged)? It seems to me that PageLSN check in >> TestForOldSnapshot() will always return false which means that the error >> "snapshot too old" won't be generated for hash indexes. >> >> Am I missing something here, if not, then I think we need a way to >> prohibit pruning for hash indexes based on old_snapshot_threshold? > > What I mean to say here is prohibit pruning the relation which has hash > index based on old_snapshot_threshold.
Good spot; added to the open issues page. Thanks! -- Kevin Grittner EDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers