Re: Another V5R1 query... Qualified DSs

And I have lot's of uses for the new qualified keyword.  For example, I
have programs I've designed to function like API's:  output to a user
space, pass back the error structure - that sort of rot.  In these programs
I'll have multiple copies of the error code data structure.  One to return
back to whom called my program and one or more to use when calling various
API's.  Now instead of having to redefine each subfield, or COPY/PASTE,
COPY/PASTE, I can use the LIKEDS.

With this, /free, and many other fine features of V5R1, I can't wait to get
my production machines up to V5R1.

Rob Berendt

==================
Remember the Cole!


                                                                                
                                       
                    Jon.Paris@hal.it                                            
                                       
                    Sent by:                 To:     RPG400-L@midrange.com      
                                       
                    owner-rpg400-l@mi        cc:                                
                                       
                    drange.com               Subject:     Re: Another V5R1 
query... Qualified DSs                      
                                                                                
                                       
                                                                                
                                       
                    05/09/01 03:07 PM                                           
                                       
                    Please respond to                                           
                                       
                    RPG400-L                                                    
                                       
                                                                                
                                       
                                                                                
                                       





 >> What's the difference between:

 >> 1.  using the QUALIFED keyword on a DS
 >> 2.  specifying PREFIX('dsname.')?

 >> Wouldn't they do exactly the same thing?

No not really.  In the first case the field name does not change - it can
be identical in multiple DSs.  It is referenced via qualification
CurrentRec.PhoneNo and PreviousRec.PhoneNo.

In the second case the field name is changed by sticking the prefix in
front of it e.g. PhoneNo becomes CPhoneNo and PPhoneNo.

Effectively it comes out to the same thing (effectiely two differently
named fields) until you consider that with the qualified option you can now
say that the PreviousRec DS is LIKEDS(CurrentRec) and all the fields and
their sizes and names come along for the ride!



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