December 2011
Intermediate to advanced
410 pages
9h 59m
English
book
CICS Transaction Server from Start to Finish
by Chris Rayns, Sarah Bertram, George Bogner, Chris Carlin, Andre Clark, Amy Ferrell, Gordon Keehn, Peter Klein, Ronald Lee, Erhard Woerner
Content preview from CICS Transaction Server from Start to Finish
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Chapter 3. CICS data 117
them). In this IBM Redbooks publication, we do not get in depth about the DB2
attachment facility and how it works; however, here is an example of how CICS
and DB2 process an application program issuing its first SQL request:
1. A language interface, or stub, DSNCLI, that is link-edited with the application
program calls the CICS resource manager interface (RMI).
2. The RMI processes the request, and passes control to the CICS DB2
attachment facility's task-related user exit (TRUE), the module that invokes
DB2 for each task.
3. The CICS DB2 attachment facility schedules a thread for the transaction. At
this stage, DB2 checks authorization, and locates the correct application plan.
4. DB2 takes control, and the CICS DB ...
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