Re: Creating functions and triggers - Mailing list pgsql-general

Whatever program or client which is supplying query could just as easily run shell scripts. And for people who follow
behindyou in this design, it will be much less confusing and a more common side effect of the script language to
executea shell script, than for a database to execute a shell script. 

What does an AFTER trigger have to do with a shell script anyway?

There's a software term called 'localization', unrelated to character sets, which means that code running in one place
ofa program or a suite of program in an application, should only have 'local effect'. Any other changes to take place
becauseof one action in one part of a program, should be passed to the code nearest the target of changes. 

It's like talking to the payroll clerk about the lousy accounting practices by the accounting dept. You don't expect
thepayroll clerk to be married or sleeping with the accountant dept head and your comments to immediately have effects
inthe accounting dept, (gossip notwithstanding). 

scott.marlowe wrote:
> Bzzzzzzzzt. WRONG.  But thanks for playing.
>
> Generally speaking, createing triggers and functions to go with
> them is a safer way of setting up access to your data than allowing Joe Q
> Programmer full update/insert/delete access.
>
> Paul, Bruce Momjian's postgresql book has a nice little section on writing
> triggers / functions in plpgsql and a few other languages, and there are
> some examples throughout the docs that show you how to, although they
> aren't all collected in one place (one example might be in the trigger
> section, the next in the plpgsql section.)
>
> So, Dennis, how do I write a PHP script that does the equivalent of firing
> an after trigger?
>
> On Wed, 7 May 2003, Dennis Gearon wrote:
>
>
>>HOLY S**T!
>>
>><rant>
>>You are basically setting yourself up for a MICROSOFT sized security
>>hole. Can you say, "Seeqwell Server?"
>>
>>You'd be MUCH better off using a PHP, PERL, ASP, JAVA, COLD FUSION, etc.
>>script for doing that. THOSE places are the focus for much work in
>>preventing the misuse of system resources from an end user perspective.
>>
>>DATABASES are for holding data, and their relationships.
>>
>></rant>
>>
>>"Fontenot, Paul" wrote:
>>
>>>Is there a good, hold your hand type of tutorial or howto on creating
>>>functions and triggers and using them together? I'm learning PostgreSQL
>>>after spending years with MySQL and the information at
>>>techdocs.postgresql.org - while good, is a little deep for me right now.
>>>Specificly I would like to be able to read something that will tell me
>>>how to create a function that will can run a shell script when certain
>>>words are entered into a record. Thanks for your time and guidance.
>>>
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