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Re: FDW API: don't like the EXPLAIN mechanism

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Andrew Dunstan <andrew(at)dunslane(dot)net>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Shigeru HANADA <hanada(at)metrosystems(dot)co(dot)jp>, Itagaki Takahiro <itagaki(dot)takahiro(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: FDW API: don't like the EXPLAIN mechanism
Date: 2011-02-21 16:45:22
Message-ID: 1298306663-sup-3600@alvh.no-ip.org (view raw or flat)
Thread:
Lists: pgsql-hackers
Excerpts from Andrew Dunstan's message of lun feb 21 13:11:25 -0300 2011:

> If we allow the invention of new explain states we'll never be able to 
> publish an authoritative schema definition of the data. That's not 
> necessarily an argument against doing it, just something to be aware of. 
> Maybe we don't care about having EXPLAIN XML output validated.

The alternative seems to be to let this information proliferate in free
form (say as text inside some other node), which may be even less convenient.

-- 
Álvaro Herrera <alvherre(at)commandprompt(dot)com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

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Subject: Re: FDW API: don't like the EXPLAIN mechanism
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