COBOL Compilation Process | COBOL DB2 Compilation | COBOL CICS Compilation

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Welcome to the “COBOL Compilation Process” tutorial. In this COBOL tutorial you’ll learn about the COBOL program compilation process, COBOL DB2 compilation process, COBOL CICS compilation process, COBOL IMS compilation process, COBOL+DB2+CICS compilation sequence and about version control tools (i.e. Change-man and Endeavour) overview. After completing the COBOL compilation process in mainframe you will have a good understanding of ‘Preparing an application to run on mainframe z/OS’ systems. Let’s begin today’s mainframe tutorial on COBOL DB2 compilation process, COBOL CICIS compilation process and COBOL+DB2+CICS compilation process.

► Index Details ◄
0:00 Welcome to COBOL Program Compilation Tutorial.
0:15 COBOL Compilation Process Tutorial Agenda.
1:10 Introduction to a Complier.
2:23 COBOL program compilation process.
3:19 COBOL DB2 Compilation Process.
3:47 COBOL DB2 compilation process flow diagram.
5:02 DB2 Bind Process (DBRM / Bind Package / Bind Plan).
6:14 COBOL DB2 compilation process flow.
7:57 COBOL CICS Program compilation process.
10:12 COBOL CICS program compilation process flow.
11:52 COBOL IMS program compilation process.
12:52 Mainframe version control tools.

The presentation begins with an introduction to a Compiler and its stages. The second section talks about steps to compile a standalone COBOL program and how the object module is link edit to COBOL subprograms and system programs by COBOL linkage editor?

The third section focuses on COBOL-DB2 complication process. In this section, you’ll learn various steps involved in compiling your COBOL DB2 program. You’ll learn DB2 bind process (i.e. DB2 Bind Plan or DB2 Bind Package) and DBRM which is generated by DB2 precompiler step. This section also, explains each stage via COBOL-DB2 compilation flow diagram and you can easily understand COBOL Db2 program preparation process.

The fourth section talks about COBOL CICS compilation process. In this section, you’ll learn various steps to prepare your COBOL CICS program for execution.

The fifth section talks about COBOL IMS compilation process. In this section you’ll learn about IMS supplied procedure and steps involved in binding IMS interface modules.

COBOL Compilation Sequence:
1. COBOL – DB2 Program: DB2 precompiler followed by normal COBOL compilation.
2. COBOL – CICS Program: CICS Translation followed by normal COBOL Compilation.
3. COBOL + DB2 + CICS Program : DB2 precompiler followed by CICS transaction followed by COBOL compilation.

COBOL Compilation process:
In general, it takes two steps to compile a COBOL program on an IBM mainframe system.
► Compile: The COBOL compiler read, validate, insert copybook and generate object code.
►Link-edit: After successful compilation, it links object code with subprogram (if any). COBOL subprogram should have complied before main-program.

►COBOL DB2 Compilation process:
COBOL-DB2 program is precompiled to translate the SQL statements into COBOL statements that invoke DB2 functions.

►What is a precompiler?
DB2 Precompiling: The DB2 precompiler prepares the source program for the compilation process. It generates the DBRM and modified source code and DBRM. Before the load module can be executed, though, DB2 must bind the program. You can bind a program directly into an application plan, or into a package and then into a plan.

COBOL CICS Compilation process:
Before you compile the COBOL-CICS program, you must translate it, and then you can compile and link-edit the translated programs as any COBOL program.

The CICS translator replaces the EXEC CICS commands with Move and Call statements that can be compiled by the COBOL compiler. The COBOL-CICS program compilation process is a three-step process:
CICS Translation then compiles translated code into an object code. The translator also inserts the code into your program. One such block of code is the Execute Interface Block (EIB).

COBOL CICS IMS Compilation process:
The compilation of the programs that use IMS database depends on the type of program (batch, BMP, or CICS online) and the language in which it is written (for example COBOL or PL1).

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