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From: Bruce Momjian <bruce@momjian.us>
To: Robert Haas <robertmhaas@gmail.com>
Cc: Josh Berkus <josh@agliodbs.com>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: pgsql-hackers@postgresql.org <pgsql-hackers@postgresql.org>
Subject: Re: Need Multixact Freezing Docs
Date: Wed, 10 Sep 2014 17:13:18 -0400
Message-ID: <20140910211318.GD21173@momjian.us> (raw)
In-Reply-To: <20140905233936.GA20146@momjian.us>
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On Fri, Sep  5, 2014 at 07:39:36PM -0400, Bruce Momjian wrote:
> On Wed, Sep  3, 2014 at 05:17:17PM -0400, Robert Haas wrote:
> > > I had a look at this and came upon a problem --- there is no multi-xid
> > > SQL data type, and in fact the system catalogs that store mxid values
> > > use xid, e.g.:
> > >
> > >          relminmxid     | xid       | not null
> > >
> > > With no mxid data type, there is no way to do function overloading to
> > > cause age to call the mxid variant.
> > >
> > > Should we use an explicit mxid_age() function name?  Add an mxid data
> > > type?
> > 
> > Maybe both.  But mxid_age() is probably the simpler way forward just to start.
> 
> OK, patch applied using mxid_age() and no new data type.

Applied.

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

  + Everyone has their own god. +


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