Re: what's the relation between pathkey and path in optimize phase?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: sunpeng <bluevaley(at)gmail(dot)com>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: what's the relation between pathkey and path in optimize phase?
Date: 2010-05-07 17:42:49
Message-ID: 16824.1273254169@sss.pgh.pa.us
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sunpeng <bluevaley(at)gmail(dot)com> writes:
> what's the relation between pathkey and path in optimize phase?

pathkey is a data structure representing the ordering of a path.
Have you read src/backend/optimizer/README ?

regards, tom lane

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