Logical decoding

From: Joshua Bay <joshuabay93(at)gmail(dot)com>
To: pgsql-committers(at)postgresql(dot)org, pgsql-hackers(at)postgresql(dot)org
Subject: Logical decoding
Date: 2016-07-08 17:57:02
Message-ID: CABb-U3YYmhRPFc5RJ5OVL-CwEzVLZLc-rcPGcLWPLJeWJVBQPg@mail.gmail.com
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Hi,

I have a question about logical decoding of Postgres.

where are the entry points to logical decoding?

Specifically, we want to know whether logical decoding happens immediately
after commit, or whether there is a polling thread that scans the Write
Ahead Log and then dumps to the special table?

and where are this code is in the codebase?

Thanks,
Joshua

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