Re: ALTER TABLE lock strength reduction patch is unsafe

Tom Lane <tgl@sss.pgh.pa.us>

From: Tom Lane <tgl@sss.pgh.pa.us>
To: Alvaro Herrera <alvherre@commandprompt.com>
Cc: Robert Haas <robertmhaas@gmail.com>, Simon Riggs <simon@2ndquadrant.com>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2011-06-17T21:08:25Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →
  1. Add bytea_agg, parallel to string_agg.

  2. Fix ALTER TABLE ONLY .. DROP CONSTRAINT.

Alvaro Herrera <alvherre@commandprompt.com> writes:
> Hmm, would there be a problem if a scan on catalog A yields results from
> supposedly-running transaction X but another scan on catalog B yields
> result from transaction Y? (X != Y)  For example, a scan on pg_class
> says that there are N triggers but scanning pg_trigger says N-1?

Yeah, I came to that same conclusion downthread.

			regards, tom lane