How To Fix RSRTS_CDS004 - Left side of comparison expresiion must refer to an element

SAP Error Message - Details

• Message type: E = Error

• Message class: RSRTS_CDS - Messages Transient CDS Queries

• Message number: 004

• Message text: Left side of comparison expresiion must refer to an element

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 RSRTS_CDS004 - Left side of comparison expresiion must refer to an element ?

  The SAP error message RSRTS_CDS004 typically occurs in the context of using Core Data Services (CDS) views or when working with ABAP CDS queries in SAP BW or SAP HANA environments. The error message indicates that there is an issue with a comparison expression in your CDS query or view definition.
  Cause:
  The error message "Left side of comparison expression must refer to an element" usually arises due to one of the following reasons:
  
  
  Invalid Comparison: The left side of a comparison expression (like =, >, <, etc.) is not referencing a valid field or element. This can happen if you are trying to compare a constant or an expression that does not resolve to a field in the context of the CDS view.
  
  
  Incorrect Syntax: There may be a syntax error in the CDS view definition, such as missing or incorrectly defined fields.
  
  
  Field Scope: The field you are trying to reference may not be available in the context of the query or may not be part of the selected fields.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check the Comparison Expression: Review the comparison expressions in your CDS view or query. Ensure that the left side of the comparison is a valid field or element that exists in the context of the query.
  
  
  Validate Field Names: Make sure that all field names are correctly spelled and that they exist in the underlying data model. If you are using aliases, ensure they are correctly defined.
  
  
  Review the CDS View Definition: Look for any syntax errors or logical issues in the CDS view definition. Ensure that all fields used in the comparison are part of the SELECT statement.
  
  
  Use the Correct Context: If you are using joins or associations, ensure that the fields you are comparing are accessible in the context of the join or association.
  
  
  Test the Query: If possible, test the query in a simpler form to isolate the issue. Start with a basic query and gradually add complexity until you identify the part that causes the error.
  
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) is a framework for defining semantically rich data models in SAP. Understanding how to define and use CDS views is crucial for working with SAP HANA and BW.
  ABAP Development: Familiarity with ABAP syntax and data types can help in troubleshooting issues related to CDS views.
  SAP Documentation: Refer to the official SAP documentation for CDS views and ABAP programming for more detailed information on syntax and best practices.
  
  If you continue to face issues after checking these points, consider reaching out to your SAP support team or consulting the SAP Community for further assistance.