Re: Postgresql to Delphi

From: Tony Caduto <tony_caduto(at)amsoftwaredesign(dot)com>
To: Bob Pawley <rjpawley(at)shaw(dot)ca>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Postgresql to Delphi
Date: 2007-03-20 22:07:29
Message-ID: 46005B21.70808@amsoftwaredesign.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-general

Bob Pawley wrote:
> Listen/notify implies a dynamic table that is constantly on the
> change. Am I correct?
>
> The table I am talking about is completed through one interface then
> imported as a relatively static information base for the application
> in which I am seeking help.
>
Yes,
you would have to define a rule on the table and when the table changed
it would send a notification back to who ever is listening.

Why don't you just run a query against the table, then loop through the
result set and then trigger your devices from inside the loop?

myquery.sql.add('select * from mytable where bla = bla;');
myquery.open;
While not myquery.eof do
begin

if myquery.fieldbyname('somefield').asstring = 'something' then
//signal your device.
myquery.next;
end;

I guess that is the best I can come up without knowing more.

Later,

--
Tony Caduto
AM Software Design
http://www.amsoftwaredesign.com
Home of PG Lightning Admin for Postgresql
Your best bet for Postgresql Administration

In response to

Responses

Browse pgsql-general by date

  From Date Subject
Next Message Bruce Momjian 2007-03-20 22:10:15 Re: Lifecycle of PostgreSQL releases
Previous Message Bob Pawley 2007-03-20 21:49:56 Re: Postgresql to Delphi