IMS Basic Programming Techniques

Description

Students will gain an understanding of the hierarchical concepts of IMS; the IMS database structures and their impact on programs; the process of defining database structures; database access and update methods; methods of validating database access and updates; and, commonly used command codes.

Objectives

At the completion of this course, the student will be able to:

• Understand the basic IMS components (DBD and PSB)
• Be able to code batch IMS programs the read, insert, update and delete IMS databases
• Code all required programs such as calls, entry, SSAs (qualified and unqualified) and PCBs in the linkage section
• Understand how to work within a hierarchical structure
• Understand and utilize command codes including path calls

Topics

• Database Definition
• Program Specification Block
• CALL Statement and its Parameters
• Linkage Section of a COBOL Program
• RETRIEVE Functions (GU, GN, GNP)
• UPDATE Functions (ISRT, REPL, DLET)

Audience:

Programmers responsible for writing application programs which will access IMS databases.