How To Fix RSRTS_CDS171 - Alias &1: nested CASE expressions are not supported

RSRTS_CDS171 - Overview

• Message type: E = Error

• Message class: RSRTS_CDS - Messages Transient CDS Queries

• Message number: 171

• Message text: Alias &1: nested CASE expressions are not supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSRTS_CDS171 - Alias &1: nested CASE expressions are not supported ?

  The SAP error message RSRTS_CDS171 indicates that there is an issue with the use of nested CASE expressions in a Core Data Services (CDS) view or query. This error typically arises when you are trying to create a calculated field using a CASE statement that contains another CASE statement within it, which is not supported in the context of the query you are executing.
  
  Cause:
  The primary cause of this error is the use of nested CASE expressions in your CDS view or SQL query. SAP's CDS framework has certain limitations, and one of them is that it does not support nested CASE statements. This can happen if you are trying to implement complex logic that requires multiple layers of conditional statements.
  
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Flatten the Logic: Instead of using nested CASE statements, try to flatten your logic into a single CASE statement. This may involve