Re: CONSTRAINT DDS Equivalent

[rob@xxxxxxxxx]

Frankly I don't think a trigger would behave any different, and I think 
that a constraint would be a better performer.  I've used both.

Rob Berendt
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Re: CONSTRAINT DDS Equivalent






What about a trigger program that validates the fields just before a 
record is written.
This can take care of prompting the user for specific values if incorrect.
When you need to change the specifics you only have to do so in one 
program.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Troy Bryant 
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I am in the process of building a new application, and I have a need
to create some fields that must contain a certain list of values.  I
know that these files will be utilized by other programmers, and I
would like to ensure, at the file level, that only certain values make
it into these fields.

I reviewed the DDS VALUES keyword for PFs, and it seems that this only
helps when building DSPFs that REF the file.  I am comtemplating
creating these tables in SQL, and using the CONSTRAINT concept to
block data being placed into this file that doesn't match the required
list of values.  This seems to work well, but I don't know
performance-wise if this will cause slowdowns.

I was wondering, am I missing something, or is there a way to create a
PF using DDS (or Code Designer), such that only certain values are
allowed into a field?

Thanks!


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