From: Philip Hallstrom <postgresql@philip.pjkh.com>
To: Ragnar Hafstað <gnari@simnet.is>
Cc: Henry Ortega <juandelacruz@gmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: insert only if conditions are met?
Date: Wed, 31 Aug 2005 14:09:59 -0700 (PDT)
Message-ID: <20050831140831.Q5678@wolf.pjkh.com> (raw)
In-Reply-To: <1125520078.2605.38.camel@localhost.localdomain>
References: <2bffcc33050831080942f806e1@mail.gmail.com>
<20050831152534.GA18934@winnie.fuhr.org>
<2bffcc3305083108487fb80cb2@mail.gmail.com>
<2bffcc3305083108497ea6dcc6@mail.gmail.com>
<1125506698.2605.22.camel@localhost.localdomain>
<2bffcc33050831094957be1b4a@mail.gmail.com>
<1125520078.2605.38.camel@localhost.localdomain>
> On Wed, 2005-08-31 at 12:49 -0400, Henry Ortega wrote:
>> Ok. Here's TABLE A
>>
>> emp date hours type
>> JSMITH 08-15-2005 5 WORK
>> JSMITH 08-15-2005 3 WORK
>> JSMITH 08-25-2005 6 WORK
>>
>> I want to insert the ff:
>> 1.) JSMITH 08-15-2005 8 VAC
>> 2.) DOE 08-16-2005 8 VAC
>>
>> #1 should fail because there is already 8 hours entered as being
>> Worked on 08-15-2005 (same date).
>
> sorry, did not notice the duplicates before my previous reply.
>
> you could do something like
> insert into A select 'JSMITH','08-15-2005',8,'VAC'
> where
> 8 != (select sum(hours) FROM A
> WHERE emp = 'JSMITH'
> AND date = '8-15-2005');
Wouldn't that fail if JSMITH had only worked 7 hours on 8-15? I'm
guessing he'd still want it to fail since adding that 8 hours ov VAC would
result in a 15 hour day... so maybe something like?
insert into A select 'JSMITH','08-15-2005',8,'VAC'
WHERE
8 >= 8 + (select sum(hours) FROM A
WHERE emp = 'JSMITH'
AND date = '8-15-2005');
?
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To: pgsql-sql@postgresql.org
Cc: postgresql@philip.pjkh.com, gnari@simnet.is, juandelacruz@gmail.com
Subject: Re: insert only if conditions are met?
In-Reply-To: <20050831140831.Q5678@wolf.pjkh.com>
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