The second part of IMS for the COBOL Programmer is for MVS programmers only. It teaches you how to handle online programs that access IMS databases and run under the data communications (DC) component of IMS. This book also covers Message Format Service (MFS). MFS acts as an interface between the format of messages at a terminal and the I/O formats in your programs. So you'll learn how to use MFS to create formatted screens that are easy for operators to use. And you'll learn what tasks you can handle through MFS instead of having to code for them in your DC programs.
IMS database processing hasn't changed much since this book was published in 1986. So if you have to maintain an old program that uses DL/I, you won't find a better book than this one. In it, you'll learn: the DL/I database structure; COBOL for using DL/I; how to work with secondary indexing, logical databases, and databases with logical relationships; how to use recovery and restart features; and the basic considerations for coding DL/I programs with CICS or IMS DC.
This book takes up where Part 1 leaves off. Part 1 covers the basics of CICS...the elements you'll use in just about every CICS program you write. Part 2 covers the advanced features you'll use regularly, though you won't need all of them for every program. To be specific, this book teaches you: -- how to use browse commands to process a file sequentially -- how to use the browse commands to process VSAM alternate index files -- how DB2 database processing affects CICS programming (if you don't have any DB2 experience, this is just an introduction; you can get the additional DB2 training you'll need from our DB2 books, described on pages 3 and 4) -- how DL/I database processing affects CICS programming (again, this is an introduction; you can get the additional DL/I training you'll need from our IMS books, described on page 9) -- how to produce multi-page output using BMS page building -- how to use the ROUTE command to direct output to one or more terminals -- how to use terminal control commands that let you communicate directly with a terminal, bypassing BMS -- how to use temporary storage queues to store and retrieve small amounts of temporary data -- how to use transient data queues (transient data exists only from the time it's written to the time it's read) -- how to use interval control commands to start a task -- how to create an abend exit to keep your task from abending when an error occurs -- how to use the distributed processing features of CICS, including Distributed Program Link and APPC After finishing this book, then, you'll know a wide variety of advanced CICS features. Just as important, though, you'll know what features dosimilar things and when to use each one. And it's that knowledge that will save you time and work every day.
For more than 40 years, Computerworld has been the leading source of technology news and information for IT influencers worldwide. Computerworld's award-winning Web site (Computerworld.com), twice-monthly publication, focused conference series and custom research form the hub of the world's largest global IT media network.
For more than 40 years, Computerworld has been the leading source of technology news and information for IT influencers worldwide. Computerworld's award-winning Web site (Computerworld.com), twice-monthly publication, focused conference series and custom research form the hub of the world's largest global IT media network.
This book teaches you all you need to know to handle VSAM files in your COBOL programs. To make learning easier, this book contains dozens of examples of COBOL programs, JCL listings, and AMS job listings. So you'll see how the various language elements interrelate. And you'll have plenty of practical models to use when you're working with VSAM on your own.
For more than 40 years, Computerworld has been the leading source of technology news and information for IT influencers worldwide. Computerworld's award-winning Web site (Computerworld.com), twice-monthly publication, focused conference series and custom research form the hub of the world's largest global IT media network.
For more than 40 years, Computerworld has been the leading source of technology news and information for IT influencers worldwide. Computerworld's award-winning Web site (Computerworld.com), twice-monthly publication, focused conference series and custom research form the hub of the world's largest global IT media network.
