Getting Startedwith pureQuery

Appendix D – Static SQL in DB2 351
Figure D.18 - Dynamic SQL statement string and its access plan are determined at
runtime.
On the other hand, static sections are pre-associated with an SQL string. A static section
will only be used to execute the single SQL string defined in the section itself, and the
section will use the access plan that was pre-determined when the package was defined
(precompiled and bound) in the database server. This reduces the number of runtime
steps required to execute the statement. In Figure D.7, three static packages are depicted
in the DBMS. Each package contains sections with predetermined SQL strings and access
plans, managed by the database catalog and package directory. The application does not
need to send the SQL string at runtime or perform the steps required to ensure an access
plan is created at runtime (prepare). The application simply identifies which predefined
statement (identified by its package and section number) to execute. The figure shows a
statement in the Payroll package being executed. DB2 will check the package
authorizations, retrieve the SQL string and plan and execute the statement immediately.