How To Fix SDDL_PARSER_MSG365 - Session variables not allowed in ON condition of directory association

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 365

• Message text: Session variables not allowed in ON condition of directory association

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG365 - Session variables not allowed in ON condition of directory association ?

  The SAP error message SDDL_PARSER_MSG365 indicates that there is an issue with the use of session variables in the ON condition of a directory association within a SAP HANA database or a similar environment. This error typically arises when you are trying to use session variables in a context where they are not permitted, specifically in the ON clause of a join or association.
  Cause:
  The primary cause of this error is the attempt to use session variables (like :variable_name) in the ON condition of a join or association. In SAP HANA, session variables are not allowed in this context because the ON condition is evaluated at a different time than when session variables are set, leading to potential inconsistencies.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Use Static Values: If possible, replace the session variable with a static value or a constant that can be used in the ON condition.
  
  
  Move Logic to WHERE Clause: If the logic can be expressed in a WHERE clause instead of the ON condition, consider moving the condition there. This allows you to use session variables without triggering the error.
  Example:
  SELECT *
  FROM table1
  JOIN table2
  ON table1.id = table2.id
  WHERE table1.some_column = :session_variable
  
  
  Refactor the Query: If the logic is complex, you may need to refactor your query to avoid using session variables in the ON condition. This might involve breaking the query into multiple steps or using temporary tables.
  
  
  Check Documentation: Always refer to the latest SAP HANA documentation or your specific SAP product documentation for any updates or changes regarding the use of session variables and associations.
  
  
  Related Information:
  
  SAP HANA SQL Reference: Review the SQL reference guide for SAP HANA to understand the limitations and rules regarding session variables and their usage in different contexts.
  Performance Considerations: Be mindful of performance implications when refactoring queries, especially if moving conditions to the WHERE clause changes the execution plan.
  Testing: After making changes, thoroughly test the modified query to ensure it returns the expected results and performs efficiently.
  
  By following these guidelines, you should be able to resolve the SDDL_PARSER_MSG365 error and successfully execute your queries without issues related to session variables.