How To Fix SDDL_PARSER_MSG153 - Optimization of Case expression and Join used is not possible.

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 153

• Message text: Optimization of Case expression and Join used is not possible.

What causes this issue?

The planned optimization for dependent joins using the annotation
@ABAPCATALOG.COMPILER.CASEJOIN is not possible in this case.
Due to the restrictions listed below, the optimization action is not
possible:
Client-independent data sources within the CASE expression
Outdated annotation for client handling The annotations to be used are
@ClientHandling.type or @ClientHandling.algorithm
Complex condition after WHEN
The restriction for individual case-when clauses is in the form <(>
<<)>Element> = literal values
Complex expression after THEN; only path expressions of length 2 are
allowed here.
Path expressions with different outbound data sources
Combination of path expressions with local defined associations and
non-local defined associations
Solely searched-case expressions are supported.
An association is used multiple times within a SELECT command;
optimization of the conditional join operations is not advantageous.
In this case, the optimization cannot be applied due to restriction
number &V1&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG153 - Optimization of Case expression and Join used is not possible. ?

  The SAP error message SDDL_PARSER_MSG153 indicates that there is an issue with the optimization of a CASE expression or JOIN operation in your SQL query or ABAP code. This error typically arises when the SQL parser cannot optimize the query due to certain conditions or constructs that are not supported for optimization.
  Causes:
  
  Complex CASE Expressions: If the CASE expression is too complex or involves non-deterministic functions, the optimizer may not be able to handle it.
  Non-Optimizable Joins: Certain types of joins, especially those involving subqueries or complex conditions, may not be optimizable.
  Data Type Mismatches: If there are data type mismatches in the CASE expression or JOIN conditions, it can lead to optimization issues.
  Database Constraints: Some database constraints or settings may prevent the optimizer from applying certain optimizations.
  Use of Functions: If the CASE expression or JOIN uses functions that are not supported for optimization, this error may occur.
  
  Solutions:
  
  Simplify the CASE Expression: Try to simplify the CASE expression by breaking it down into smaller parts or using simpler logic.
  Review JOIN Conditions: Ensure that the JOIN conditions are straightforward and do not involve complex subqueries or functions.
  Check Data Types: Verify that the data types used in the CASE expression and JOIN conditions are compatible and correctly defined.
  Use Temporary Tables: If the query is too complex, consider breaking it down into smaller queries and using temporary tables to store intermediate results.
  Analyze Execution Plan: Use the database's execution plan analysis tools to understand how the query is being executed and identify bottlenecks.
  Consult Documentation: Refer to SAP documentation or the specific database documentation for any limitations regarding CASE expressions and JOIN optimizations.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide guidance on optimization issues.
  Database Documentation: Review the documentation for the specific database you are using (e.g., HANA, Oracle, SQL Server) for details on optimization capabilities and limitations.
  Performance Tuning: Consider general performance tuning practices for SQL queries, such as indexing, query restructuring, and analyzing execution plans.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage with SAP support or a database administrator for further assistance.