From: S.F. Lee <sflee_tw@yahoo.com>
To: clayton cottingham <clayton@marketingchallenge.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: how to execute a C program via trigger ?
Date: Mon, 4 Dec 2000 18:20:29 -0800 (PST)
Message-ID: <20001205022029.62885.qmail@web10401.mail.yahoo.com> (raw)
Thank for your hint, but I have some questions :
1. Do I have to compile the C program into a shared
object (*.so)?
2. Do I have to use SPI (SPI is too complicate to
me)?
My request is very simple. I have a program
(my_c_program)
that I can execute it under shell by typing
(my_c_program).
Basically my_c_program is not a function.
I want to fire a trigger after I update the field
(x) in table foo, and the trigger can run the
my_c_program. Is there an easy way to execute a
PROCESS
via trigger?
regards, S.F. Lee
--- clayton cottingham
<clayton@marketingchallenge.com> wrote:
> take a look at the contrib sections fti or fulltext
> index example
>
> it takes you through it all
>
>
>
> "S.F. Lee" wrote:
> >
> > Hi,
> >
> > I am using Red Hat 6.1 + PostgreSQL 7.0.3. All
> of
> > my
> > applications are developed by C and ECPG. I would
> > like to know how to execute a C program by
> Trigger,for
> > example:
> >
> > 1. I have a program my_c_program.c shuch as:
> >
> > #include <stdio.h>
> > main()
> > {
> > printf("Hello World !\n");
> > }
> >
> > 2. I create a table foo by following command
> >
> > CREATE TABLE foo
> > (
> > x int4
> > );
> >
> > 3. create a trigger foo_trig :
> >
> > create trigger foo_trig after update
> > on foo for each row execute procedure sql_c();
> >
> > 4. I don't know how to design sql_c(), can
> anyone
> > give a small plpsql program that can execute
> > my_c_program?
> >
> > regards, S.F. Lee
> >
> > __________________________________________________
> > Do You Yahoo!?
> > Yahoo! Shopping - Thousands of Stores. Millions of
> Products.
> > http://shopping.yahoo.com/
__________________________________________________
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Cc: sflee_tw@yahoo.com, clayton@marketingchallenge.com
Subject: Re: how to execute a C program via trigger ?
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