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Re: Explain Nodes

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: "David E(dot) Wheeler" <david(at)kineticode(dot)com>
Cc: Peter Geoghegan <peter(at)2ndquadrant(dot)com>, "pgsql-hackers(at)postgresql(dot)org Hackers" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Explain Nodes
Date: 2011-04-28 22:40:04
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers

On 04/28/2011 06:07 PM, David E. Wheeler wrote:
> On Apr 28, 2011, at 3:02 PM, Peter Geoghegan wrote:
>> The code for all nodes is in src/backend/executor.
>> I think that you will find it useful to look at the big switch
>> statements in ExecInitNode() and friends in execProcnode.c .
> Yep, same as what I found in src/backend/commands/explain.c. Thanks. I'll keep using what's in src/backend/commands/explain.c because I'm using the XML format in explanation and so the nodes have human-readable names.

It's been pointed out before that plugins (like FDWs) can invent their 
own explain nodes, so we'll never have a canonical list of such nodes.



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