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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326 Introduction to the New Mainframe: z/VSE Basics
database calls. For batch programs the connection to the PSB is built in another
way, but there is no difference to online programs in respect to the database
calls.
In the second example a Get Unique call retrieves segment Adams into a field
named ioarea. The Get Unique call-type allows it to access DL/I segments
directly.
The subsequent Get Next call is not qualified by a segment type. Therefore DL/I
follows the hierarchical path and returns the EXPR (experience) segment with
number 12 in the ioarea field. The Get Next call-type can be used to read a DL/I
database sequentially.
12.10.4 DL/I environments
DL/I applications can be run in different environments. Initially (and this is still ...
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