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Re: directly construct a query plan

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Chengkai Li" <dbresearch(at)hotmail(dot)com>
Cc: pgsql-docs(at)postgresql(dot)org
Subject: Re: directly construct a query plan
Date: 2004-10-04 19:02:51
Message-ID: 1405.1096916571@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-docs
"Chengkai Li" <dbresearch(at)hotmail(dot)com> writes:
> I plan to directly construct a query plan without going through the query 
> optimizer, by manipulating the various data structures for representing 
> query plan tree and parse tree. Is there any facility inside/outside 
> postgresql that can be of help? Is there any known issue/difficulty related 
> to this?

Only that your code *will* break in each future release, because we have
no hesitation about whacking those data structures around ...

			regards, tom lane

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