How To Fix DDLS146 - User-defined functions are not supported in the & clause

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 146

• Message text: User-defined functions are not supported in the & clause

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS146 - User-defined functions are not supported in the & clause ?

  The SAP error message DDLS146 indicates that user-defined functions (UDFs) are not supported in the & clause of a SQL statement. This typically occurs when you are trying to use a UDF in a context where it is not allowed, such as in a dynamic SQL statement or in certain clauses of a SQL query.
  Cause:
  The error arises because the SAP HANA database does not allow user-defined functions to be used in certain contexts, particularly in the & clause, which is often used for dynamic SQL or variable substitution. This restriction is in place to ensure the integrity and performance of SQL execution.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Avoid Using UDFs in the & Clause: Review your SQL statement and ensure that you are not using any user-defined functions in the & clause. Instead, try to use standard SQL functions or rewrite the logic to avoid the need for a UDF in that context.
  
  
  Refactor the SQL Statement: If possible, refactor your SQL statement to eliminate the need for dynamic SQL or to use UDFs in a different part of the query where they are allowed.
  
  
  Use Alternative Approaches: If the logic implemented in the UDF is essential, consider implementing it directly in the SQL statement using standard SQL constructs or using a different approach that does not involve UDFs.
  
  
  Check Documentation: Refer to the SAP HANA SQL and System Views Reference documentation for more details on where UDFs can be used and the limitations associated with them.
  
  
  Related Information:
  
  SAP HANA SQL Reference: This documentation provides comprehensive details on SQL syntax, functions, and the limitations of using UDFs.
  Performance Considerations: Using UDFs can sometimes lead to performance issues, especially if they are used inappropriately. Always consider the performance implications of your SQL queries.
  SAP Community and Support: If you continue to face issues, consider reaching out to the SAP Community or SAP Support for further assistance and best practices.
  
  By following these guidelines, you should be able to resolve the DDLS146 error and improve your SQL query's compatibility with SAP HANA.