How To Fix SY285 - SQL prefetch inactive

SAP Error Message - Details

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 285

• Message text: SQL prefetch inactive

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SY285 - SQL prefetch inactive ?

  The SAP error message SY285 indicates that SQL prefetch is inactive. This message typically arises in the context of database operations where the system is trying to optimize data retrieval but finds that the prefetch mechanism is not enabled or functioning as expected.
  Cause:
  The SQL prefetch mechanism is designed to improve performance by fetching data in larger blocks rather than one row at a time. The error message SY285 can occur due to several reasons:
  
  Database Configuration: The database settings may not be configured to allow SQL prefetching.
  SAP System Settings: The SAP system parameters related to database access may not be set correctly.
  Database Driver Issues: The database driver being used may not support prefetching or may have issues.
  Query Complexity: The specific SQL query being executed may be too complex or not suitable for prefetching.
  Resource Limitations: There may be resource limitations on the database server that prevent prefetching from being activated.
  
  Solution:
  To resolve the SY285 error, you can take the following steps:
  
  
  Check Database Configuration:
  
  Ensure that the database is configured to support SQL prefetching. This may involve checking the database documentation or consulting with your database administrator.
  
  
  
  Review SAP Parameters:
  
  Check the SAP system parameters related to database access. You can use transaction code RZ10 to review and modify instance profiles. Look for parameters related to SQL prefetching.
  
  
  
  Update Database Drivers:
  
  Ensure that you are using the latest version of the database drivers. Sometimes, updating the drivers can resolve compatibility issues.
  
  
  
  Optimize SQL Queries:
  
  Review the SQL queries being executed. Simplifying complex queries or breaking them into smaller parts may help in enabling prefetching.
  
  
  
  Monitor Resource Usage:
  
  Check the resource usage on the database server. If the server is under heavy load, it may not be able to activate prefetching. Consider optimizing the database performance or scaling resources.
  
  
  
  Consult Documentation:
  
  Refer to the SAP Notes and documentation for any specific recommendations related to your version of SAP and the database you are using.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Database Documentation: Review the documentation for your specific database (e.g., Oracle, SQL Server, HANA) for details on configuring SQL prefetching.
  Performance Monitoring: Use performance monitoring tools to analyze database performance and identify bottlenecks that may affect prefetching.
  
  By following these steps, you should be able to diagnose and resolve the SY285 error related to SQL prefetch being inactive.