Re: Partial Index Too Literal?

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От Martijn van Oosterhout
Тема Re: Partial Index Too Literal?
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Msg-id 20080626195059.GE27678@svana.org
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Ответ на Partial Index Too Literal?  ("Phillip Mills" <pmills@systemcore.ca>)
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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@svana.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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