How do you use CICS ISSUE QUERY?

Use CICS ISSUE QUERY with RESP parameters to check response codes and handle any errors appropriately.

What are the different types of queries?

Query types include basic queries (basic queries, mapped queries, unmapped queries, custom queries), advanced queries (advanced queries, secure queries, encrypted queries, compressed queries), and specialized queries (specialized queries, high-performance queries, low-latency queries, high-throughput queries).

When should you use CICS ISSUE QUERY?

Use CICS ISSUE QUERY when building applications that need to issue queries, when implementing query management, when issuing queries, when building query systems, or when implementing query functionality.

CICS ISSUE QUERY - Issue Query

CICS ISSUE QUERY issues a query, enabling query management and output processing in CICS environments. It provides efficient query capabilities for CICS applications.

What is CICS ISSUE QUERY?

CICS ISSUE QUERY issues a query, enabling query management and output processing. It provides efficient query capabilities, allowing applications to issue queries.

Command Syntax

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EXEC CICS ISSUE QUERY
    [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

Query Types

1. Basic Queries

Basic queries: Basic queries
Mapped queries: Mapped queries
Unmapped queries: Unmapped queries
Custom queries: Custom queries

2. Advanced Queries

Advanced queries: Advanced queries
Secure queries: Secure queries
Encrypted queries: Encrypted queries
Compressed queries: Compressed queries

3. Specialized Queries

Specialized queries: Specialized queries
High-performance queries: High-performance queries
Low-latency queries: Low-latency queries
High-throughput queries: High-throughput queries

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 query
    EXEC CICS ISSUE QUERY
        RESP(WS-RESPONSE)
        RESP2(WS-RESPONSE2)
    END-EXEC.
    
    IF WS-RESPONSE NOT EQUAL DFHRESP(NORMAL)
        EXEC CICS WRITE OPERATOR
            TEXT('ISSUE QUERY command failed')
        END-EXEC
        EXEC CICS RETURN END-EXEC
    END-IF.
    
    * Query issued successfully
    * Continue processing

Query Processing

1. Query Preparation

Query preparation includes:

Query validation
Query formatting
Query encoding
Query processing

2. Query Transmission

Query transmission includes:

Query routing
Query 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): Query issued successfully
QUERY (4): Query issued

Error Response Codes

INVREQ (16): Invalid request
NOTFND (20): Resource not found
LENGERR (22): Length error
QUERY (24): Query error

Best Practices

1. Query Preparation

Prepare query appropriately
Validate query content
Handle different query types
Ensure query integrity

2. Error Handling

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

3. Performance Optimization

Minimize query operations
Use efficient query formats
Optimize user updates
Manage user resources

Explain It Like I'm 5 Years Old

Imagine you're asking a question:

When you want to ask a question, you say the question and wait for an answer. If you get an answer, you can do something with it. If you don't get an answer, you have to ask again.

CICS ISSUE QUERY is like asking a question. The computer program asks a question and waits for an answer. If it gets an answer, the program can do something with it. If it doesn't get an answer, the program has to ask again.

Just like you ask questions, the computer program asks questions!

Exercises

Exercise 1: Query Issuance

Write a CICS ISSUE QUERY command to issue a query.

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

Exercise 2: Query Processing

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

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

Quiz

Question 1

What is the primary purpose of CICS ISSUE QUERY?

A) To format queriesB) To issue a queryC) To validate queriesD) To edit queries

Answer: B) To issue a query

Question 2

Which parameter specifies the response code?

A) RESPB) RESPONSEC) CODED) QUERY

Answer: A) RESP

CICS ISSUE QUERY - Issue Query

What is CICS ISSUE QUERY?

Command Syntax

Parameters Explained

RESP Parameters

Query Types

1. Basic Queries

2. Advanced Queries

3. Specialized Queries

Implementation Example

Query Processing

1. Query Preparation

2. Query Transmission

3. Output Management

Common Response Codes

Success Response Codes

Error Response Codes

Best Practices

1. Query Preparation

2. Error Handling

3. Performance Optimization

Explain It Like I'm 5 Years Old

Exercises

Exercise 1: Query Issuance

Exercise 2: Query Processing

Quiz

Question 1

Question 2

Related Concepts

CICS Query Processing

CICS User Management

CICS Output Processing

Related Pages