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Re: intercepting WAL writes

From: "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>
To: Mike <mike(at)fonolo(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: intercepting WAL writes
Date: 2008-05-28 23:46:44
Message-ID: 36e682920805281646o6cac11a8lc9e6a23810f7d705@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On Wed, May 28, 2008 at 7:11 PM, Mike <mike(at)fonolo(dot)com> wrote:
> Can somebody point to the most logical place in the code to intercept the
> WAL writes? (just a rough direction would be enough)

XLogInsert

> or if this doesn't make sense at all, another suggestion on where to get
> the data? (I'm trying to avoid doing it using triggers).

Without triggers, you don't have many options.  With triggers, you
could use pg_memcache.  If you take it from the WAL, you'll have to do
a bit of decoding to make it usable in the context you're looking for,
which is quite a bit of work.

-- 
Jonah H. Harris, Sr. Software Architect | phone: 732.331.1324
EnterpriseDB Corporation | fax: 732.331.1301
499 Thornall Street, 2nd Floor | jonah(dot)harris(at)enterprisedb(dot)com
Edison, NJ 08837 | http://www.enterprisedb.com/

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