Re: Terminology definitions/meaning

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Chris Velevitch" <chris(dot)velevitch(at)gmail(dot)com>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Terminology definitions/meaning
Date: 2007-12-12 05:56:50
Message-ID: 12691.1197439010@sss.pgh.pa.us
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"Chris Velevitch" <chris(dot)velevitch(at)gmail(dot)com> writes:
> I'm trying to understand the explain output, but I can't find any
> references to the meanings of the following terms:-
> merge join
> nested loop
> merge left join
> nested loop left join

http://developer.postgresql.org/pgdocs/postgres/planner-optimizer.html

regards, tom lane

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