Which Of The Following Is An Optional Step In Preparation Of A Cobol Db2 Program For Execution?

Create DCLGEN This is optional, we also call DCLGEN as Declaration Generator. We have to create DCLGEN before that we can also use the equivalent COBOL variable for the DB2 columns.

How a COBOL DB2 program is executed?

The COBOL-DB2 program can be executed with the help of IKJEFT01. The IKJEFT01 is an inbuilt mainframe utility that allows us to run z/OS TSO commands via Job control language(JCL). If we want to execute a COBOL-DB2 program PROGA of plan PLANA we must give a JCL step as below.

How DB2 program compile and run in COBOL?

The compilation is done using the utility IGYCRCTL. The object module is then passed to the link editing step, where object module is link edited and executable load module is generated using IEWL utility. The DBRM which was generated in the first step is binded to a package or directly binded to a plan.

Which DB2 command can be used to create COBOL declarations for a table?

DCLGEN
DCLGEN (declarations generator)
The Db2 declarations generator, DCLGEN, produces these DECLARE statements for C, COBOL, and PL/I programs, so that you do not need to code the statements yourself.

What is DB2 stored procedure and what is COBOL stored procedure explain there significance?

Stored procedures are routines executed directly by a DB2 LUW Server instance, rather than indirectly via a call to a routine from within a client application. The benefits of using DB2 stored procedures over SQL calls include enhanced modularity, security, and performance.

What are the steps for execution of a COBOL program?

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.

Which method is used in a DB2 execute query?

executeQuery method. To retrieve data from a table using a SELECT statement with parameter markers, you use the PreparedStatement. executeQuery method.

Which program do you use to run a COBOL DB2 batch application?

For running COBOL DB2 program, specialised IBM utility is used in the JCL and program; DB2 region and required parameters are passed as input to the utility.

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

To run your COBOL program in TSO, compile and link-edit the program, and then run it in either with or without ISPF. You must compile and link-edit your COBOL program before you can run it in TSO. After your COBOL program compiles successfully, you can run it with JCL without ISPF.

What is execution plan in DB2?

Execution plans are generated for several SQL commands, including SELECT , UPDATE , DELETE and INSERT commands . The plans are generated taking into account a number of factors: the physical structure of the table: type of table (normal, range partitioned, MDC – Multidimensional clustering tables, etc).

Which methods can be used to load data into Db2 hosted tables?

You can use several methods to load data into Db2 tables. The most common method for loading data into most of your tables is to use the LOAD utility.
Loading data into Db2 tables

• Using the INSERT statement in an application program.
• Interactively through SPUFI.
• With the command line processor.

What is the data item used to declare data during declaration in COBOL?

Value clause is an optional clause which is used to initialize the data items. The values can be numeric literal, alphanumeric literal, or figurative constant. It can be used with both group and elementary items.

Where the host variable should be declared in a COBOL program?

Host variables are data items defined within a COBOL program. They are used to pass values to and receive values from a database. Host variables can be defined in the File Section, Working-Storage Section, Local-Storage Section or Linkage Section of your COBOL program and have any level number between 1 and 48.

What is stored procedures and the benefits of using stored procedures?

Stored procedures are compiled once and stored in executable form, so procedure calls are quick and efficient. Executable code is automatically cached and shared among users. This lowers memory requirements and invocation overhead.

What is stored procedure in DB2 mainframe?

A stored procedure is a compiled program that can execute SQL statements and is stored at a local or remote Db2 server. You can invoke a stored procedure from an application program or from the command line processor.

What is stored procedure importance of stored procedure?

A stored procedure provides an important layer of security between the user interface and the database. It supports security through data access controls because end users may enter or change data, but do not write procedures.

What are the 4 steps in executing a program?

1. Step 1: Fetch instruction. Execution cycle starts with fetching instruction from main memory.
2. Step 2: Decode instruction.
3. Step 3: Perform ALU operation.
4. Step 4: Access memory.
5. Step 5: Update Register File.
6. Step 6: Update the PC (Program Counter)

What are the stages of program execution?

The phases are edit time, compile time, link time, distribution time, installation time, load time, and run time.

In which of the following perform statements in COBOL The loop will be executed at least once irrespective of the condition?

With a do while loop the condition is not evaluated until the end of the loop. Because of that a do while loop will always execute at least once.

When we can use execute () method?

execute : Returns true if the first object that the query returns is a ResultSet object. Use this method if the query could return one or more ResultSet objects. Retrieve the ResultSet objects returned from the query by repeatedly calling Statement.

Which of the following method can be used to execute all types of queries?

execute() : The method used for all types of SQL statements, and that is, returns a boolean value of TRUE or FALSE.