CICS Tutorial
CICS Useful Resources
Selected Reading
- CICS - Interview Questions
- CICS - Status Codes
- CICS - Intercommunication
- CICS - Temporary Storage
- CICS - Control Operations
- CICS - Error Handling
- CICS - File Handling
- CICS - Aid Keys
- CICS - Pseudo Programming
- CICS - Interface Block
- CICS - MAP
- CICS - BMS
- CICS - COBOL Basics
- CICS - Transactions
- CICS - Nucleus
- CICS - Basic Terms
- CICS - Environment
- CICS - Overview
- CICS - Home
CICS Useful Resources
Selected Reading
- Who is Who
- Computer Glossary
- HR Interview Questions
- Effective Resume Writing
- Questions and Answers
- UPSC IAS Exams Notes
CICS - File Handling
CICS - File Handpng
CICS allows us to access file data in many ways. Most file accesses are random in onpne system as the transactions to be processed are not batched and sorted into any kind of order. Therefore CICS supports the usual direct access methods − VSAM and DAM (Direct Access Method). It also allows us to access data using database managers.
Random Access
Following are the commands which are used for random processing −
| Sr.No | Commands & Description |
|---|---|
| 1 |
READ command reads data from a file using primary key. |
| 2 |
Write command is used to add new records to a file. |
| 3 |
REWRITE command is used to modify a record that is already present in a file. |
| 4 |
DELETE command is used to delete a record that is present in a file. |
Sequential Access
Following are the commands which are used for sequential processing −
| Sr.No | Commands & Description |
|---|---|
| 1 |
STARTBR is known as start browse. |
| 2 |
When we issue a STARTBR command, it does not make the records available. |
| 3 |
The RESETBR command allows us to reset our starting point in the middle of a browse. |
| 4 |
When we have finished reading a file sequentially, we terminate the browse using the ENDBR command. |