Re: [HACKERS] Interesting behaviour !

> Hannu Krosing wrote:
> >
> > You may try :
> >
> > explain select * from note where perioada=15::int2;
> >
> > i think that the default for 'untyped' numbers is int4 and
> > this currently confuses the optimiser.
>
> You are right! Thanks a lot! Watch this!
>
> contabil=> explain select * from note where perioada=29::int2;
> NOTICE: QUERY PLAN:
> Index Scan using note_perioada on note (cost=108.96 rows=1600 width=87)
>
> EXPLAIN
> contabil=> explain select * from note where perioada=29;
> NOTICE: QUERY PLAN:
> Seq Scan on note (cost=1099.99 rows=1600 width=87)
>
> My queries are faster now!
>
> I think that this thing should be fixed. You need more than common SQL
> in order to optimize your queries.
> That conversions should be automatically assumed by the query optimizer
> in order to deliver real performances.
> I don't know how difficult that would be.

I thought we had this fixed in 6.5. Is that what you are using?

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