March 2007
Beginner
526 pages
13h 53m
English
book
Introduction to the New Mainframe: z/VSE Basics
by Wolfgang Bosch, Hans Joachim Ebert, Helmut Hellner, G. M. (Jerry) Johnston, Wilhelm Mild, Ingolf Salm, Joerg Schmidbauer, Martin Walbruehl, Mike Ebbers
Content preview from Introduction to the New Mainframe: z/VSE Basics
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Chapter 13. z/VSE connectors 351
13.9 Mapping VSE/VSAM data to a relational structure
In the past, VSAM data was mainly accessed using application programs that
understood the internal structure of the VSAM data. The record layout was
represented by data structures within the application programs. The
disadvantages of using this method are:
There is no way to share a given record layout with other applications.
If the record layout changes, the application program must also be changed.
The data structure is dependent on the programming language (for example,
COBOL, Assembler, or PL/I).
Formatted data reports have to be created on the operating-system platform
on which the application programs run.
However, the development of e-b ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.