How do I use Dclgen in COBOL program?

To include declarations from DCLGEN in your program: Code the following SQL INCLUDE statement in your program: EXEC SQL INCLUDE member-name END-EXEC. member-name is the name of the data set member where the DCLGEN output is stored.

How do I create a Dclgen in DB2?

Invoke DCLGEN by performing one of the following actions:

1. To start DCLGEN from ISPF through DB2I: Select the DCLGEN option on the DB2I Primary Option Menu panel.
2. To start DCLGEN directly from TSO: Sign on to TSO, issue the TSO command DSN, and then issue the subcommand DCLGEN.

Is Dclgen mandatory in COBOL?

It’s not mandatory to use DCLGEN; instead we can also use the working storage variables. But using DCLGEN gives the consistency between the Tables variables and Host variables. Compilation Process: For a normal COBOL program only compiling the code will be enough to create a load module.

What are host variables in DB2?

A host variable is a data item that you declare in a program for use within an SQL statement. You can: Assign the value in the host variable to a special register. A special register is a storage area that Db2 defines for a process to hold information that SQL statements can reference.

How to create a DB2 program in COBOL?

Step 1) Create all necessary tables. Step 2) Create dclgen ( optional ) Step 3) Precompile. Step 4) Compile and link edit. Step 5) db2 bind. Step 6) Execute / run the program. Below is a reference code to link SQL database with COBOL using JCB commands. Here we have used a sample SQL database. IDENTIFICATION DIVISION.

What is the purpose of dclgen in DB2?

The DCLGEN utility helps us to generate the table structures and host variables automatically. Using this utility, we just need to give the DB2 table name and it will return the table structure and the host variables in a PDS member.

How are Host variables used in DB2 logic?

The host variables are used in the program logic to move the data from DB2 to program and vice versa. There is one host variable for every table column based on its data type. For example, for a table column with data type CHAR (2), there should be a host variable with equivalent COBOL data type as PIC X (2).

Where does the DBRM statement go in COBOL?

Here when the precompiler separates a skill and non-skill statement then the skill statements goes in DBRM. DBRM contains a set of a SQL statement, which are derive from COBOL DB2 source program. DBRM is passed as input to this Bind process, so this DBRM will be input to this BIND process and output will generate output as a Plan.

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