| 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: | 4DB9ECC4.8090503@dunslane.net |
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| 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.
cheers
andrew
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