| From: | Thomas Lockhart <lockhart(at)alumni(dot)caltech(dot)edu> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Zeugswetter Andreas IZ5 <Andreas(dot)Zeugswetter(at)telecom(dot)at>, pgsql-hackers(at)postgreSQL(dot)org |
| Subject: | Re: Selectivity of "=" (Re: [HACKERS] Index not used on simple se lect) |
| Date: | 1999-07-28 14:51:17 |
| Message-ID: | 379F18E5.FD8A5E0D@alumni.caltech.edu |
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| Lists: | pgsql-hackers |
> > This was in postgresql code some time ago, but was removed
> > for some reason I don't remember.
> It was? There's still a ton of code in the optimizer to support it
> (a big chunk of indxqual.c is for testing index predicates).
There was talk of removing it, but it seemed to be a Bad Idea to do
so. The discussion even provoked a negative response from the Gods
themselves (in the voice of Paul Aoki) and led to the short
description of them in the docs.
They have definitely been neglected, but are a Good Thing and should
be rehabbed...
- Thomas
--
Thomas Lockhart lockhart(at)alumni(dot)caltech(dot)edu
South Pasadena, California
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