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  2. RPG400-L
  3. August 2002

Re: Same prefixes (was Re: It's That Time Again! etc.)

Richard B Baird wrote:
>
> using QUALIFIED data-structures doesn't help when reading or chaining to
> files, unless you use program described files with a ds name in the result
> field, or you immediately move the record format to the datastructure after
> read, then move back before updating.  messy and potentially dangerous!
>

Richard, if you want to read an ext-desc file into a qualified data
structure, you use a qualified PREFIX on your F spec.

Fmyfile  IF   E          PREFIX('MYDS.')
D MYDS      E DS         QUALIFIED EXTNAME(myfile)

or

Fmyfile  IF   E          PREFIX('MYDS.XY')
D MYDS      E DS         QUALIFIED EXTNAME(myfile)
D                        PREFIX('XY')

In V5R2, you can use a data structure in the result field for
externally-described files.

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