Lists: | pgsql-sql |
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From: | Louis-David Mitterrand <vindex+lists-pgsql-sql(at)apartia(dot)org> |
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To: | pgsql-sql(at)postgresql(dot)org |
Subject: | passing a multiple join to a function? |
Date: | 2007-12-17 13:06:29 |
Message-ID: | 20071217130629.GA8338@apartia.fr |
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Lists: | pgsql-sql |
Hi,
I've got this ugly case statement that I'd like to hide in a function:
select
...
case when
d.start_date <= CURRENT_DATE and
case when w.show_type in ('cinéma','livre')
then d.start_date >= CURRENT_DATE - 21
else (d.end_date >= CURRENT_DATE or d.end_date is null) end
then '0_actualite'
when
d.start_date > CURRENT_DATE
then '1_agenda'
else '2_archive'
end
as timing
...
from story s
join show w on (s.id_show = w.id_show)
join show_date d on (d.id_show = w.id_show and
d.start_date = (select d2.start_date from show_date d2 where d2.id_show = w.id_show order by d2.end_date >= CURRENT_DATE desc,
d2.start_date limit 1)
)
...
I could very well create a show_timing(int) function that accepts an
id_show and performs its own, additional, multiple join complex query on
story, show_date, and show.
Is there a way of feeding enough data to the function to avoid another
query?
Thanks,
From: | Rodrigo De León <rdeleonp(at)gmail(dot)com> |
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To: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: passing a multiple join to a function? |
Date: | 2007-12-17 17:27:34 |
Message-ID: | a55915760712170927v5ada3a6axb04b223141bc4376@mail.gmail.com |
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Lists: | pgsql-sql |
On 12/17/07, Louis-David Mitterrand <vindex+lists-pgsql-sql(at)apartia(dot)org> wrote:
> I've got this ugly case statement that I'd like to hide in a function:
Why don't you hide the entire query in a VIEW?
From: | Louis-David Mitterrand <vindex+lists-pgsql-sql(at)apartia(dot)org> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | Re: passing a multiple join to a function? |
Date: | 2007-12-23 16:37:45 |
Message-ID: | 20071223163745.GA6472@apartia.fr |
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Lists: | pgsql-sql |
On Mon, Dec 17, 2007 at 12:27:34PM -0500, Rodrigo De León wrote:
> On 12/17/07, Louis-David Mitterrand <vindex+lists-pgsql-sql(at)apartia(dot)org> wrote:
> > I've got this ugly case statement that I'd like to hide in a function:
>
> Why don't you hide the entire query in a VIEW?
That is probably the best solution. Thanks