| From: | Martijn van Oosterhout <kleptog(at)svana(dot)org> |
|---|---|
| To: | Phillip Mills <pmills(at)systemcore(dot)ca> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Partial Index Too Literal? |
| Date: | 2008-06-26 19:50:59 |
| Message-ID: | 20080626195059.GE27678@svana.org |
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| Lists: | pgsql-general |
On Thu, Jun 26, 2008 at 03:24:41PM -0400, Phillip Mills wrote:
> dev=# explain analyze select * from result where active = true;
> dev=# explain analyze select * from result where active is true;
> This is version 8.2.6. Is there something I'm missing that could make these
> queries ever produce different results?
As usual the counter example is when there a NULL where the two
expressions arn't equal. That this doesn't affect the result of the
query is I suppose a deficiency of the expression comparitor...
Have a nice day,
--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> Please line up in a tree and maintain the heap invariant while
> boarding. Thank you for flying nlogn airlines.
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