What is plan in COBOL DB2?

What is plan in COBOL DB2?

A plan is an executable module containing the access path logic produced by the DB2 optimizer. It can be composed of one or more DBRMs and packages. Before a DB2 for z/OS program (with static SQL) can be run, it must have a plan associated with it. Plans are created by the BIND command.

What is plan and package in COBOL DB2?

A package contains control structures that Db2 uses when it runs SQL statements. An application plan relates an application process to a local instance of Db2 and specifies processing options. Packages are produced during program preparation.

What is plan bind in DB2?

Although the BIND PLAN command accepts the MEMBER option, the MEMBER option is deprecated. Use it only when you cannot run BIND PACKAGE to bind DBRMs into packages explicitly. When you specify MEMBER, Db2 binds the DBRMs into packages, and includes those packages in a package list for the specified plan.

What is plan package and collection in DB2?

The package or group of packages (collections) are binded into a plan. A plan is an executable object which contains the DB2 access paths of all the SQL queries within it. We can bind a package into a plan directly or we can first generate a collection using package(s) and then bind it to a plan.

How do I create a DB2 plan?

To create a plan table:

1. On the DB2 Administration Menu (ADB2) panel, specify option E , and press Enter.
2. On the EXPLAIN (ADB2E) panel, specify the following options, and press Enter: In the command line, specify CT .
3. On the Create PLAN_TABLE (ADB2EC) panel, accept the default values, or specify your own values:

What is a plan in mainframe?

Plan is a DB2 object (produced during the bind process) that associates one or more database request modules with a plan name. They contain executable code for SQL statements for one DBRM. The advantages of using PACKAGE are: 1. Avoid having to bind a large number of DBRM members into a plan.

How do I create a Db2 plan?

What is null indicator in Db2?

Db2 uses a special value indicator, the null value , to stand for an unknown or missing value. A null value is a special value that Db2 interprets to mean that no data is present. If you do not specify otherwise,Db2 allows any column to contain null values.

What is plan bind?

It gives you the ability to test different versions of an application without extensive rebinding. BIND PLAN establishes the relationship between DB2 and all DBRMs or packages in that plan. Plans can specify explicitly named DBRMs, packages,collections of packages, or a combination of these elements.

How do I join two tables in DB2?

1. Inner join. You can use an inner join in a SELECT statement to retrieve only the rows that satisfy the join conditions on every specified table.
2. Left outer join. The LEFT OUTER JOIN clause lists rows from the left table even if there are no matching rows on right table.
3. Right outer join.
4. Full outer join.

How do I join two tables in Db2?

Where is plan and package stored in DB2?

A DB2 “plan” is stored in the DB2 Directory and information about the plan is stored in the DB2 Catalog. The DB2 Directory table that contains actual plans is SYSIBM. SCT02 (and SYSIBM. SPT01 contains actual packages).

What is Dbrm in COBOL?

DBRM stands for Database Request Module. This is the traditional DB2® serialized representation of the SQL statements in a program. For example, a program may be written in COBOL. This program will be preprocessed by DB2 to produce a DBRM that will be used to bind against a particular DB2 subsystem.

What is deadlock in Db2?

A deadlock occurs when two or more application processes each hold locks on resources that the others need and without which they cannot proceed. After a preset time interval, Db2 can roll back the current unit of work for one of the processes or request a process to terminate.

What is coalesce in Db2?

COALESCE DB2 function is used to handle the NULL values that might be present in the data or a list of values that are specified. If the NOT NULL constraint on the column is not applied, then the default value that gets inserted in those columns when not specified is the NULL value.

What is null indicator in Cobol?

The NULL indicator is a 2 byte field and takes the value as -1 when the corresponding column has the NULL value in it. The configuration of NULL indicator in COBOL is PIC S9(4) COMP. For example, we have a DB2 column ORDER_DESCRIPTION with data type VARCHAR(50) and it can hold NULL value.

What is Dsnhpc?

DB2 utility DSNHPC is used for the precompilation. The inputs to the precompilation JCL step are DCLGEN (in SYSLIB) for the respective tables which are used in COBOL-DB2 program and COBOL-DB2 source program (in SYSIN).

What Sqlcode 911?

-911 THE CURRENT UNIT OF WORK HAS BEEN ROLLED BACK DUE TO DEADLOCK OR TIMEOUT. REASON reason-code , TYPE OF RESOURCE resource-type , AND RESOURCE NAME resource-name.

What Sqlcode 805?

Explanation. An application program attempted to use a package that was not found.

What is NVL in Db2?

DB2 NVL is used to handle the NULL values that might be present in the data or a list of values that are specified. When the data is stored in DB2 RDBMS, we use the tables and store the data in rows and columns format.

What is Dclgen?

DCLGEN generates a table or view declaration and puts it into a member of a partitioned data set that you can include in your program. When you use DCLGEN to generate a table declaration, Db2 gets the relevant information from the Db2 catalog.

What SQLCODE 811?

-811 THE RESULT OF AN EMBEDDED SELECT STATEMENT OR A SUBSELECT IN THE SET CLAUSE OF AN UPDATE STATEMENT IS A TABLE OF MORE THAN ONE ROW, OR THE RESULT OF A SUBQUERY OF A BASIC PREDICATE IS MORE THAN ONE VALUE.

What SQLCODE 204?

“SQLCODE=-204, SQLSTATE=42704” is a DB2 error code indicating ‘object does not exist’; in this case, it is indicating that either the USER_TABLES object is not present, or that the <UserID> user does not have access to read this.

What is coalesce in DB2?

WHAT IS NULL value in DB2?

A null value is a special value that Db2 interprets to mean that no data is present. If you do not specify otherwise,Db2 allows any column to contain null values. Users can create rows in the table without providing a value for the column. Using the NOT NULL clause enables you to disallow null values in the column.