Re: [EXTERNAL] Re: detecting "bad data" using an sql statement

I know legacy DDS PF's performed validation on read, as opposed to DDL tables that validate on write (IMO the biggest reason to exterminate DDS).


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From: Vernon Hamberg <vhamberg@xxxxxxxxxxxxxxx>
Sent: Friday, January 12, 2018 3:04 PM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Re: [EXTERNAL] Re: detecting "bad data" using an sql statement

Hey Justin

There are all manner of ways for data to be put into a table and be
corrupt - I can think of some option on CPYF that would do it.

So it is not just native RPG I/o that can put data into a table, or SQL
INSERT or UPDATE - there are other mechanisms.

There IS a difference in the timing of when this is checked, a
difference between SQL and RPG.

Cheers
Vern