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CICS ISSUE ERASE - Issue Erase

CICS ISSUE ERASE issues an erase, enabling erase management and output processing in CICS environments. It provides efficient erase capabilities for CICS applications.

What is CICS ISSUE ERASE?

CICS ISSUE ERASE issues an erase, enabling erase management and output processing. It provides efficient erase capabilities, allowing applications to issue erases.

Command Syntax

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EXEC CICS ISSUE ERASE
    [RESP(response-code)]
    [RESP2(response-code-2)]
END-EXEC.

Parameters Explained

RESP Parameters

Response codes returned by the command:

  • RESP: Primary response code
  • RESP2: Secondary response code
  • Always check these codes for command success
  • Handle command failures appropriately

Erase Types

1. Basic Erases

  • Basic erases: Basic erases
  • Mapped erases: Mapped erases
  • Unmapped erases: Unmapped erases
  • Custom erases: Custom erases

2. Advanced Erases

  • Advanced erases: Advanced erases
  • Secure erases: Secure erases
  • Encrypted erases: Encrypted erases
  • Compressed erases: Compressed erases

3. Specialized Erases

  • Specialized erases: Specialized erases
  • High-performance erases: High-performance erases
  • Low-latency erases: Low-latency erases
  • High-throughput erases: High-throughput erases

Implementation Example

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WORKING-STORAGE SECTION.
01 WS-RESPONSE            PIC S9(8) COMP.
01 WS-RESPONSE2           PIC S9(8) COMP.
 
PROCEDURE DIVISION.
    * Issue erase
    EXEC CICS ISSUE ERASE
        RESP(WS-RESPONSE)
        RESP2(WS-RESPONSE2)
    END-EXEC.
    
    IF WS-RESPONSE NOT EQUAL DFHRESP(NORMAL)
        EXEC CICS WRITE OPERATOR
            TEXT('ISSUE ERASE command failed')
        END-EXEC
        EXEC CICS RETURN END-EXEC
    END-IF.
    
    * Erase issued successfully
    * Continue processing

Erase Processing

1. Erase Preparation

Erase preparation includes:

  • Erase validation
  • Erase formatting
  • Erase encoding
  • Erase processing

2. Erase Transmission

Erase transmission includes:

  • Erase routing
  • Erase delivery
  • Transmission confirmation
  • Error handling

3. Output Management

Output management includes:

  • User management
  • Output formatting
  • User experience
  • Performance optimization

Common Response Codes

Success Response Codes

  • NORMAL (0): Erase issued successfully
  • ERASE (4): Erase issued

Error Response Codes

  • INVREQ (16): Invalid request
  • NOTFND (20): Resource not found
  • LENGERR (22): Length error
  • ERASE (24): Erase error

Best Practices

1. Erase Preparation

  • Prepare erase appropriately
  • Validate erase content
  • Handle different erase types
  • Ensure erase integrity

2. Error Handling

  • Check all response codes
  • Handle erase failures
  • Implement retry logic
  • Log error conditions

3. Performance Optimization

  • Minimize erase operations
  • Use efficient erase formats
  • Optimize user updates
  • Manage user resources

Explain It Like I'm 5 Years Old

Imagine you're erasing something:

When you want to erase something, you say "erase" and the thing gets erased. If the thing gets erased, you can do something else. If the thing doesn't get erased, you have to try again.

CICS ISSUE ERASE is like erasing something. The computer program says "erase" and the thing gets erased. If the thing gets erased, the program can do something else. If the thing doesn't get erased, the program has to try again.

Just like you erase things, the computer program erases things!

Exercises

Exercise 1: Erase Issuance

Write a CICS ISSUE ERASE command to issue an erase.

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EXEC CICS ISSUE ERASE
    RESP(WS-RESPONSE)
    RESP2(WS-RESPONSE2)
END-EXEC.

Exercise 2: Erase Processing

How would you implement comprehensive erase processing that handles different erase types and requirements?

Answer: Identify different erase types and appropriate handling, implement erase validation and encoding, handle different erase types and capabilities, implement proper error handling for erase failures, optimize erase operations for performance, and maintain erase integrity throughout the process.

Quiz

Question 1

What is the primary purpose of CICS ISSUE ERASE?

Answer: B) To issue an erase

Question 2

Which parameter specifies the response code?

Answer: A) RESP

Related Concepts

CICS Erase Processing

Erase processing and output in CICS

CICS User Management

User management and user interaction in CICS

CICS Output Processing

Output processing and erase display in CICS