What is compilation in DB2?

What is compilation in DB2?

The Db2 precompiler scans a program and copies all of the SQL statements and host variable information into a DBRM (database request module). The precompiler also returns source code that has been modified so that the SQL statements do not cause errors when you compile the program.

What is the output of pre compilation process?

Precompilation is the process through which the SQL statements used in the COBOL-DB2 program are replaced by appropriate COBOL calls. The precompilation is necessary before the actual compilation because the COBOL compiler cannot recognize the DB2 SQL statements and will throw errors due to them.

How do I compile and run a COBOL program in DB2?

Steps for executing COBOL DB2 program

1. Step1: Create all these necessary tables.
2. Step2: Create DCLGEN(optional)
3. Step3: Precompile.
4. Step4: Compile and Link Edit.
5. Step5: DB2 BIND.
6. Step6: Execute/Run the Program.

What is precompiler in mainframe?

Precompiler is responsible for checking the syntax errors of DB2 statements before placing them in DBRM (DataBase Request Module). Precompiler doesn’t check the syntax errors of COBOL statements or any other programming language(PL/I etc.) statements.

How COBOL program is compiled?

COBOL compile procedure. An example shows a single-step procedure for compiling a source program. The JCL in Figure 1 executes the IGYWC procedure, which is a single-step procedure for compiling a source program. It produces an object deck that will be stored in the SYSLIN data set, as we can see in Figure 2.

How do you compile in COBOL?

Cobol Hello World Example: How To Write, Compile and Execute Cobol Program on Linux OS

1. Write a Hello World Cobol Program. Create the helloworld program using the Vim editor as shown below.
2. Make sure Cobol Compiler is installed on your system.
3. Installing cobc compiler.
4. Compile the cobol program.
5. Execute the cobol Program.

How do I compile a mainframe program in COBOL?

COBOL HELLO WORLD Program

1. Step1: Code the COBOL Program.
2. Step2: Prepare the COMPILE JCL to compile and Link Edit the COBOL Program.
3. Step3: Prepare the RUN JCL to execute the COBOL Program.

How does cursor work in DB2?

Using a cursor is like keeping your finger on a particular line of text on a printed page. In Db2, an application program uses a cursor to point to one or more rows in a set of rows that are retrieved from a table. You can also use a cursor to retrieve rows from a result set that is returned by a stored procedure.

What happens when you compile a COBOL program?

When a COBOL-DB2 program is compiled, a DBRM (Database Request Module) is created along with the load module. The DBRM contains the SQL statements of the COBOL programs with its syntax checked to be correct. The DBRM is bound to the DB2 region (environment) in which the COBOL will run.