IMS Database Concepts for COBOL Programmers

Duration

4 hours

Overview

Audience

Personnel requiring knowledge about the way database management systems like IMS facilitate COBOL application development in a mainframe environment.

Prerequisites

Knowledge of the mainframe environment, TSO, ISPF, and JCL, and COBOL programming experience.

Objectives

After completing this course, the student will be able to:
• Define hierarchical databases
• Define DL/I application programming concepts

Course Content

IMS Database Introduction

Database Evolution and Different Models of DBMS
IMS/DB Structures
Segments and Parent-Child Relationships

IMS Database Definition

Different Types of IMS Databases
Define a Database Structure
Create a Database

Accessing an IMS Database

Accessing the Database
Program Control Blocks (PCB) and Program Specification Blocks (PSB)
Ways These Units are Used to Enforce Data and Access Security
Unit Use in an Online Environment
Introducing DL/I

Introducing DL/I

DL/I Functions
PCB Mask
Segment I/O Area
SSAs
Produce a DL/I Call
Coding a Simple COBOL DL/I Batch Program

Extended DL/I Functions

DL/I Command Codes
DL/I Status Codes
How to Delete and Replace Segments
How to Access Lower Levels in a Hierarchy
Secondary Indexing
Logical Databases

IMS Backout and Recovery

Recovery Concepts and Procedures
Restart Concepts and Procedures