What is the function of a PSB in IMS DB?
In IMS DB (Information Management System Database), a PSB (Program Specification Block) serves as a critical component that defines the database operations that an application program can perform.
The PSB provides a blueprint for database access, specifying the segments to be accessed, the access paths to be used, and other parameters required for database operations.
Here are the key functions of a PSB in IMS DB :
* Database Operation Definition
* Segment Identification
* Access Path Specification
* Segment Ordering
* Error Handling
* Concurrency Control
* Transaction Management
