>
> On Feb 26, 2010, at 0:55 , Дмитрий Фефелов wrote:
>
> > http://developer.postgresql.org/pgdocs/postgres/release-9-0.html
> >
> > Performance section:
> >
> >> Simplify the forms foo <> true and foo <> false to foo = false and
> >
http://developer.postgresql.org/pgdocs/postgres/release-9-0.html
Performance section:
> Simplify the forms foo <> true and foo <> false to foo = false and
> foo = true during query optimization.
Will it work correct;ly when foo is NULL?
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> The only case that I think still has any merit is where you get a
> significantly better plan with known parameter values than without.
> The projected-cost threshold might be a reasonable approach for
> attacking that, ie, if estimated cost of generic plan exceeds X
> then take the time to build
