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.
COBOL or PL/I programming experience and program edit and submission knowledge.
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.
Data Base Description; Program Specification Block; Application Control Block.
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.
execution; message calls; IMS/DC status codes; alternate destinations; Program to Program messages; modifiable PCBs; express PCBs; conversational processing.
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.
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.
Join our public courses in our Istanbul, London and Ankara facilities. Private class trainings will be organized at the location of your preference, according to your schedule.