What is IMS and DB2?

What is IMS and DB2?

Db2 makes it easier to access the data due to the hierarchical way data has to be accessed in IMS. In IMS, you essentially have to drill down to find the data. Using Syncsort Optimize IMS, the business logic remains unchanged. This software makes the migration process less risky.

How do I run an IMS program?

An IMS program cannot be executed directly; rather it is always called as a subroutine. An IMS application program consists of Program Specification Blocks to provide a view of the IMS database.

What is DB2 COBOL?

COBOL is known as the Host Language. COBOL-DB2 applications are those applications that include both COBOL and DB2. Embedded SQL statements work like normal SQL statements with some minor changes. For example, the output of a query is directed to a predefined set of variables which are referred as Host Variables.

What is IMS DC in mainframe?

An Introduction IMS DC Slide: 2 • IMS: Which is a Hierarchical DBMS, supplied by IBM & runs on Mainframe Computers. It has 2 main components: Data Base (DB) Processing Data Communication (DC) Processing. Note: DL/I DOS/VS does not support Data Communication Component.

Which is better IMS DB or DB2?

DB2 optimizes queries internally whereas IMS programmers construct access paths to data. This additional requirement will cause DB2 to consume more CPU. But, of course, that additional CPU brings with it the enormous benefit of database optimization and better ad hoc query support.

How do I find the version of IMS?

To display the full version information for FM/IMS, enter VER on the Command line of any panel. The current FM/IMS version number and the PTF number for each File Manager component is displayed in a window. The window also indicates whether or not FM/IMS is APF-authorized.

How do I load an IMS database?

Load the IMS database

1. From the Enterprise Developer IDE Solution Explorer, right-click a DBD in your project; then click Database Utilities > Load.
2. In the Load dialog box, specify the . dat file to use in the Input data set name field.
3. Set the correct File Layout and any other settings as required, and click Execute.

How does COBOL program connect to DB2?

Procedure

1. Edit the property group that is associated with the COBOL or PL/I program.
2. Click the COBOL or PL/I tab to open the COBOL Settings or PL/I Settings page.
3. On the Local Compiler Options page, provide the following information: Compiler options TEST,MACRO,OPTIONS.
4. Select Source contains EXEC SQL statements.

How a COBOL-DB2 program is executed?

The DBRM is bound to the DB2 region (environment) in which the COBOL will run. This can be done using the IKJEFT01 utility in a JCL. After the bind step, the COBOL-DB2 program is run using IKJEFT01 (again) with the load library and DBRM library as the input to the JCL.

What are the different environments supported by IMS?

IMS Batch Environment There are two types of IMS batch environments: DB Batch and TM Batch. These environments are discussed in DB Batch Environment and TM Batch.

What is IMS DB DC?

This example of an IMS™ DB/DC system definition includes definitions for data communication, system configuration, databases, and application programs. A sample IMS DB/DC environment is the basis for this example of an IMS DB/DC system definition. An overview of the IMS system is followed by system details and macros.

What does CBLTDLI stand for in IMS DB COBOL?

Given below are the points to note about the Call statement − CBLTDLI stands for COBOL to DL/I. It is the name of an interface module that is link edited with your program’s object module. After each DL/I call, the DLI stores a status code in the PCB.

When to use the entry statement in COBOL?

The entry statement is used to define the entry point in the program. When we call a sub-program in COBOL, its address is also provided. Likewise, when the DL/I gives the control to the application program, it also provides the address of each PCB defined in the program’s PSB.

Which is the program that reads the IMS database?

Sample IMS DB and COBOL program, which reads IMS database segments and create a sequential (flat) file, an input to the IMS DB-DB2 conversion program. Loading… Experienced software developer. Skills in Development, Coding, Testing and Debugging.

When to use call statement in IMS DB?

Call statement is used to request for DL/I services such as executing certain operations on the IMS database. Here is the syntax of the call statement − CALL ‘CBLTDLI’ USING DLI Function Code PCB Mask Segment I/O Area [Segment Search Arguments] The syntax above shows parameters which you can use with the call statement.