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IMS/DB & IMS/TM (DC) Programming
- Categories:
- Enterprise Systems and Architecture Software and DevOps
- Code:
- TPIDBC
Overview
Designed, written and presented by Minerva Douglas, one of the UK's foremost IMS programming specialists, this course teaches the skills and techniques required to write programmes in both IMS/DB and IMS/TM (formerly IMS/DC) environments.
The course covers not only IMS database access, but also includes the programming components necessary for coding on-line programs.
The course contains several practical exercises that allow attendees to work through various programs and learn the most structured and efficient use of IMS database calls.
This course is also available 'On Demand' at the High Wycombe training centre, or for one-company, on-site presentations.
Prerequisites
COBOL or PL/I programming experience and program edit and submission knowledge.
What's included
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Hands-on, instructor-led training delivered in a QA learning centre
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Best for: Individuals and teams who benefit from deep focus, direct interaction, and practical, hands-on learning.
What's included?
5 Days instructor led course
6 month free access to QA learning platform
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Tailored programmes built around your organisation’s goals, challenges, and skill levels. Delivered in the format that suits you to maximise relevance and impact.
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Find out more about the course:
Learning outcomes
- describe the basic components of IMS DB (DL/I) and IMS/TM
- understand and use the terminology encountered in IMS environments
- describe and explain the main facilities available in IMS DB
- code and test a basic COBOL or PL/I program to access IMS databases
- write a typical Message Processing Program
- describe the differences in conversational programs
- write and test a simple PSB
- use BTS to test an MPP
- recognise simple MFS statements.
Course outline
Introduction to IMS/DB & IMS/TM
Hierarchical database versus conventional files; hierarchical database terminology; DB and DC comparison; IMS program execution; Batch Message Processing Program (BMP); IMS message scheduling; Logical Terminal Concept; IMS message types.
IMS Components
Data Base Description; Program Specification Block; Application Control Block.
IMS/DB Programming
IMS batch programming; DL/1 Call Statement; Segment Search Arguments; GU function; GN function; GNP function; ISRT function; REPL function; DLET function; efficiency considerations; positioning; multiple qualification; IMS DB status codes; program structure.
IMS/TM Programming
execution; message calls; IMS/DC status codes; alternate destinations; Program to Program messages; modifiable PCBs; express PCBs; conversational processing.
Command Codes
D Command Code; F Command Code; L Command Code; C Command Code; P Command Code; N Command Code; U Command Codes; V Command Code.
Database Access Methods
HSAM; HISAM; HDAM; HIDAM; non-Hierarchical Sequential Organisation; Secondary Indexing; Logical Relationships; Logical Structures.
Conversational Programs
The scratch pad area; conversational program structure.
Checkpoint & Recovery
Commit points; types of checkpoint; GSAM database; IMS DB recovery; IMS DB backout.
Batch Terminal Simulator (BTS)
BTS overview; ./T command statement; ./D command statement; ./O command statement; other BTS command statements.
Message Format Service (MFS)
MFS objectives; MFS message descriptor; MFS device format application programs & MFS; MFS control block chaining.
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