How To Fix SDDL_PARSER_MSG450 - Functions not allowed in projection views

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 450

• Message text: Functions not allowed in projection views

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 SDDL_PARSER_MSG450 - Functions not allowed in projection views ?

  The SAP error message SDDL_PARSER_MSG450 indicates that certain functions are not permitted in projection views. This error typically arises when you attempt to use specific SQL functions or operations that are not supported in the context of a projection view in SAP HANA.
  Cause:
  The error occurs because projection views in SAP HANA are designed to provide a simplified view of the data, and they have restrictions on the types of operations that can be performed. Functions that modify data or require complex processing are not allowed in projection views. This includes certain aggregate functions, window functions, or any operations that would require a full table scan or complex calculations.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Review the SQL Query: Check the SQL query or the view definition that is causing the error. Identify any functions or operations that are not allowed in projection views.
  
  
  Modify the View: If you are using functions that are not supported, you may need to refactor your view. This could involve:
  
  Removing unsupported functions.
  Replacing them with simpler expressions or calculations that are allowed.
  Creating a different type of view (e.g., a calculation view) that can accommodate the required functions.
  
  
  
  Use Calculation Views: If your use case requires complex calculations or functions, consider using calculation views instead of projection views. Calculation views allow for more complex logic and can include various types of functions.
  
  
  Check Documentation: Refer to the SAP HANA documentation for a list of supported functions and operations in projection views. This can help you understand the limitations and design your views accordingly.
  
  
  Testing: After making changes, test the view to ensure that it works as expected and does not produce the error.
  
  
  Related Information:
  
  SAP HANA Documentation: Always refer to the official SAP HANA documentation for the most accurate and detailed information regarding views, functions, and their limitations.
  SAP Community: Engage with the SAP Community forums to seek advice from other users who may have encountered similar issues.
  Performance Considerations: When designing views, consider performance implications, especially if you are moving from projection views to calculation views, as the latter may have different performance characteristics.
  
  By following these steps, you should be able to resolve the SDDL_PARSER_MSG450 error and successfully create the desired view in SAP HANA.