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Re: Design: Escort info from WHERE clause to executor?
- From: Heikki Linnakangas <heikki(at)enterprisedb(dot)com>
- To: peter(dot)trautmeier(at)gmx(dot)de
- Cc: pgsql-hackers(at)postgresql(dot)org
- Subject: Re: Design: Escort info from WHERE clause to executor?
- Date: Wed, 25 Jul 2007 11:37:07 +0100
- Message-id: <46A727D3(dot)9020909(at)enterprisedb(dot)com>
peter(dot)trautmeier(at)gmx(dot)de wrote: > To sum up, I am looking for a (decently efficient) scheme that is able to > > (1) pass arbitrary conditional expressions from WHERE to the executor in a structure preserving way. > (2) annotate arbitrary expressions with weights that survive on its way from the parser to the executor. > (3) access the logical value of particular subexpressions. > > I have some basic ideas how at least some of the requirements might be achieved. But as I am not totally satisfied with my ideas I hope you can provide me with some fresh input. Why? What are you trying to achieve? -- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com
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