How To Fix S1602 - Explain for SQL commands involving system tables is not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: S1 - Statistik / SAP-Monitor

• Message number: 602

• Message text: Explain for SQL commands involving system tables is not possible

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message S1602 - Explain for SQL commands involving system tables is not possible ?

  The SAP error message S1602 ("Explain for SQL commands involving system tables is not possible") typically occurs when you attempt to use the EXPLAIN command on SQL statements that involve system tables or views in the SAP HANA database. This error indicates that the EXPLAIN functionality, which is used to analyze the execution plan of SQL statements, cannot be applied to certain system tables.
  Cause:
  
  System Tables: The error arises because the EXPLAIN command is not supported for SQL statements that reference system tables or system views. System tables are internal tables that store metadata and other system-related information.
  SQL Command Structure: If your SQL command includes system tables or views, the database engine will not allow the EXPLAIN command to be executed on it.
  
  Solution:
  
  Avoid System Tables: If you need to analyze the execution plan of a SQL command, ensure that the command does not reference any system tables or views. Instead, focus on user-defined tables or views.
  Use Alternative Methods: If you need to analyze performance or execution plans for queries involving system tables, consider using other performance monitoring tools or techniques provided by SAP HANA, such as:
  
  Performance Analysis Tools: Use tools like the SAP HANA Studio or SAP HANA Cockpit to monitor query performance.
  SQL Trace: Enable SQL tracing to capture execution details without using EXPLAIN.
  Plan Visualizer: Use the Plan Visualizer in SAP HANA to analyze query performance without directly using EXPLAIN on system tables.
  
  
  
  Related Information:
  
  SAP HANA Documentation: Refer to the official SAP HANA documentation for more details on SQL commands and the limitations of the EXPLAIN command.
  Performance Tuning: Familiarize yourself with best practices for performance tuning in SAP HANA, which can help you optimize queries without needing to analyze system tables directly.
  SAP Community: Engage with the SAP Community forums for discussions and solutions related to similar issues encountered by other users.
  
  By following these guidelines, you can work around the limitations of the EXPLAIN command and still gain insights into the performance of your SQL queries in SAP HANA.