IMS/DB Programming

Objectives
On successful completion of this course, attendees will be able to:

• describe the basic components of IMS DB
• understand and use IMS DB terminology
• describe and explain the main facilities available in IMS DB
• code and test a basic COBOL or PL/I program to access IMS databases.

Who Should Attend
Systems Analysts, Applications Programmers and DBAs (as a first stage of their training).
Prerequisites
COBOL or PL/I programming experience and program edit and submission knowledge.
Duration
4 days

Course Code
DIDP
Contents
Introduction to IMS
Hierarchical database versus conventional files; hierarchical database terminology.


IMS components
Data Base Description; Program Specification Block; Application Control Block.


IMS 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.


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.