Message-ID: <4A82CB26.3070208@gmail.com>
Date: Wed, 12 Aug 2009 08:01:10 -0600
From: Rob Sargent <robjsargent@gmail.com>
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To: Jan Verheyden <jan.verheyden@uz.kuleuven.ac.be>
CC: 'Denis BUCHER' <dbucherml@hsolutions.ch>,
	"'pgsql-sql@postgresql.org'" <pgsql-sql@postgresql.org>
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Subject: Re: mail alert

It looks to me like you want Dennis's #2.  Lauch a mailer script from a 
trigger function.  (Function can be any language you're familiar with 
including pgsql if you wish to take advantage of
    "\! your-mail-script"

Jan Verheyden wrote:
> Hi,
>
> I got a bit stuck... 
> I was looking for a solution for option a)
>
> Maybe I'll first explain the situation a bit more:
>
> I have one database for patient registration
> Another one for image storage
> And a third one for book keeping
> A patient should be registered first before the images are stored, so if there is a new line in the second database with an id which does not exist yet, it has to be notified in the book keeping database.
>
> Now the questions:
> 	1) Can I do this with the inner join (tables subject_id from DB1, pat_id from DB2), there it is two different databases 
> 	2) Once it is notified in the book keeping that is not registered yet, is it best to poll on this column to send a warning, or use a trigger??
>
> Thanks!!
>
>
> Jan
> -----Original Message-----
> From: Rob Sargent [mailto:robjsargent@gmail.com] 
> Sent: Wednesday, August 12, 2009 3:38 AM
> To: Denis BUCHER
> Cc: Jan Verheyden; 'pgsql-sql@postgresql.org'
> Subject: Re: [SQL] mail alert
>
> Denis BUCHER wrote:
>   
>> Hello,
>>
>> Jan Verheyden a écrit :
>>   
>>     
>>> I was looking in what way it’s possible to alert via mail when some
>>> conditions are true in a database.
>>>     
>>>       
>> a) If the alert is not "very urgent" i.e. you can alter some minutes
>> later I would do it like this :
>>
>> 1. Create a function that returns what you need, most importantly if the
>> conditions are met
>>
>> 2. Create a script that does something like "SELECT * FROM function()..."
>>
>> b) If the email should be sent immediately, you could create a perl
>> function in the database, launched by a TRIGGER and launching an
>> "external" script...
>>
>> Therefore, first you have to know the requirements...
>>
>> Denis
>>
>>   
>>     
> see "check_postgres" for nagios-style monitoring
> see \o /tmp/alert_data_file
> and \! mailx -s "alert" me@work.com /tmp/alert_data_file
>
>