I don't see any reason why you could not use nulls in fields as long as you use the length of data parameter to obtain the data.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Thomas Garvey
Sent: Thursday, September 06, 2012 3:09 PM
To: 'Midrange Systems Technical Discussion'
Subject: data queues and null indicators

I've been using data queues to funnel data into several programs. I am using the typical method (I suppose) of using data structures to define the data values in the data queue entries. This particular data structure is externally defined.

Now I have need to be able to determine if individual field values in the data queue entry are null. That is, the data placed there by the originating program(s) is properly setting the field's null value using the %nullind function.

The externally defined data structure has the fields defined as null capable, but I'm thinking that passing the null settings for each field is beyond the capability of data queues, no matter how you define the data contained in them.

Has anyone else been in this situation? Short of adding an array of flags to the end of the data structure to contain the null indicators for each field, anybody got any ideas?


Thomas Garvey

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