On Sun, Nov 13, 2011 at 11:16 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > While investigating bug #6291 I was somewhat surprised to discover > $SUBJECT. The cause turns out to be this kluge in alter_table.sql: > > select virtualtransaction > from pg_locks > where transactionid = txid_current()::integer
... > that plasters on the appropriate epoch value for an > assumed-to-be-current-or-recent xid, and returns something that squares > with the txid_snapshot functions. Then the test could be coded without > kluges as That fixes the test, but it doesn't fix the unreasonability of this situation. We need a function called transactionid_current() so a normal user can write select virtualtransaction from pg_locks where transactionid = transactionid_current() and have it "just work". We need a function whose behaviour matches xid columns in pg_locks and elsewhere and that doesn't need to have anything to do with txid datatype. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers