Tandem Transaction Application Language

Duration

3 to 4 hours

Overview

Audience

Personnel requiring the ability to code in Tandem Transaction Application Language (TAL).

Prerequisites

Programming technique and knowledge of the Tandem system.

Objectives

After completing this course, the student will be able to:
• Define the basics of TAL programming
• Identify how to code TAL programs

Course Content

Introduction to TAL Programming, Part 1

Structure of a TAL Program
Basic Rules of TAL Syntax
Some Commonly Used TAL Syntax
Some Commonly Used TAL Procedures
TAL:
• Comments
• Begin/ End Pairs
• Variables
• External Procedures
• Integers
• Global Variables
• Local Variables
• Assign Statement
• Arithmetic Operations
• Myterm
• Open Procedure
• Write Procedure
• Read Procedure
• If Then Else Statement
• Stop Procedure
Compiling a Program

Introduction to TAL Programming, Part 2

String Variables
Layout of a TAL Program
TAL – Structs, Substructs
TAL – STARTUP message
$RECEIVE file
One Way Interprocess Communication - the Caller, the Receiver

Introduction to TAL Programming, Part 3

Two Way Interprocess Communication
• The Requester
• Replying, the Server
TAL Error Processing on File Operations
• DEBUG
• FILEINFO
Types of Disk Files
• Entry Sequenced Files
• Key Sequenced Files
• Key Position Procedure
• Relative Files
• Structured Files
• Partitioned Files
Equivalencing
Direct and Indirect Variables
DEFINE