What is rebind in DB2?
The REBIND command allows the user to re-create a package stored in the database without the need for a bind file.
What is bind and rebind in DB2?
For static SQL, it’s during the BIND/REBIND process that the DB2 optimizer determines the optimal access path to the data for each SQL statement using various inputs such as the SQL statement text, the schema definition, and the current object statistics from the DB2 catalog. …
What is Rbind in DB2?
Examines all packages in a database, and rebinds those packages which are marked as invalid, so that they are not rebound implicitly during application execution. Authorization. One of the following: sysadm.
Why do we require package in DB2?
A package contains control structures that Db2 uses when it runs SQL statements. Db2 applications require an application plan. Packages make application programs more flexible and easier to maintain. In general, you create plans and packages by using the Db2 commands BIND PLAN and BIND PACKAGE.
When should we execute a rebind of a plan?
For example, you can use REBIND PLAN when you change authorizations, modify package lists for the plan, or use RUNSTATS. If the rebind is successful, the process prepares an application plan and updates its description in the catalog table SYSPLAN. REBIND PLAN is generally faster and more economical than BIND PLAN.
What is Sqlca in DB2?
SQLCA stands for SQL-Communication Area. It is a medium through which DB2 can communicate with the COBOL program. In a typical COBOL-DB2 program, there are many SQL statements used. The main purpose of SQLCA is to inform the COBOL program about the status and other details of the most recently executed SQL query.
What application plan contains?
An application plan contains a list of package names. Db2 applications require an application plan. Packages make application programs more flexible and easier to maintain. In general, you create plans and packages by using the Db2 commands BIND PLAN and BIND PACKAGE.
What is Plan in COBOL DB2?
What is a plan? 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.
How do I check my Runstats?
Monitoring the progress of RUNSTATS operations You can use the LIST UTILITIES command or the db2pd command to monitor the progress of RUNSTATS operations on a database.
When should we execute a rebind rather than a bind?
When the embedded SQL of the application is changed.