Re: run a program when a file changes

Hi

I wonder if you could say why you see triggers as "not a good solution".
Not trying to dispute your conclusion, just trying to understand what your
thinking and perspective is.

I agree with Buck that triggers seem a reasonable answer on the surface of
it.

I can understand that on the surface of it the trigger solution might seem
less efficient because the program might run "more often" but there is a
good chance the program will either be simpler or less error prone when run
on a record by record basis.

On Wed, Sep 12, 2018 at 2:09 PM Buck Calabro <kc2hiz@xxxxxxxxx> wrote:

On Tue, 11 Sep 2018 at 21:44, Booth Martin <booth@xxxxxxxxxxxx> wrote:

Several random times a day a file is cleared and then populated again
through DDM . When that happens I want to automatically run a program
that updates another file.

A trigger is on rows, so using a trigger would run the program for every
row - not a good solution.

It seems to me as if a trigger should work.
The program that would get called has all of the logic to process
records from file1 and put the right stuff into file2.
Put that same logic into a trigger, and when record 1 arrives, the
trigger fires, processing the row, sending the right stuff to file2,
etc.
That's simplistic, assuming the process doesn't need extensive
commitment control or anything like that.
--buck
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