Re: Re: WHERE 1 = 1 (any info on this)

Hi!

I think where num_field + 0 = 1 suppresses index, not the other way.

Tanel.

> > im assuming this is an old 'trick' from RBO days. Alot of these are
still floating around. Wasnt there one when you
> wanted to force a full table scan you would go
> >
> > where num_field = 1 + 0;
> >
> > the + 0 forced the full table scan? I was on a project earlier this year
and one guy told people to use it.
> >
>
> Actually, that one is still valid. Along with using any
> function around a predicate column. In general, an expression
> instead of the column name in a predicate will force ignoring
> of any conventional indexes on that column.
> Of course, function-based indexes were made just for that.
>
>
> Cheers
> Nuno Souto
> nsouto_at_optusnet.com.au
>
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>
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-- 
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-- 
Author: Tanel Poder
  INET: tanel.poder.003_at_mail.ee

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