How To Fix DDLS150 - In the "order by" clause, currently only identifiers are allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 150

• Message text: In the "order by" clause, currently only identifiers are allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS150 - In the "order by" clause, currently only identifiers are allowed ?

  The SAP error message DDLS150 indicates that there is an issue with the SQL statement being executed, specifically in the "ORDER BY" clause. The error message states that only identifiers (such as column names) are allowed in the "ORDER BY" clause, and it suggests that there may be an invalid expression or function being used.
  Cause:
  The error typically occurs due to one of the following reasons:
  
  Invalid Expressions: The "ORDER BY" clause contains expressions or functions that are not allowed. For example, using calculations, aggregates, or non-column identifiers.
  Incorrect Syntax: There may be a syntax error in the SQL statement that leads to this issue.
  Use of Aliases: If you are trying to use an alias defined in the SELECT clause in the ORDER BY clause, it may not be recognized in some contexts.
  
  Solution:
  To resolve the DDLS150 error, you can take the following steps:
  
  
  Check the ORDER BY Clause: Ensure that the "ORDER BY" clause only contains valid column identifiers. Remove any expressions, functions, or calculations.
  
  Example of a valid ORDER BY clause:
  SELECT column1, column2 FROM table_name ORDER BY column1;
  
  
  
  
  Use Column Names: If you need to sort by a calculated value, consider using a subquery or Common Table Expression (CTE) to first calculate the values and then sort by them in the outer query.
  
  
  Avoid Using Aliases: If you are using aliases in your SELECT statement, try to use the original column names in the ORDER BY clause instead.
  
  
  Review SQL Syntax: Double-check the entire SQL statement for any syntax errors that might be causing the issue.
  
  
  Related Information:
  
  SAP Documentation: Refer to the SAP Help Portal or the specific documentation for your version of SAP for more details on SQL syntax and restrictions.
  SQL Standards: Familiarize yourself with SQL standards regarding the use of ORDER BY clauses, as they can vary between different database systems.
  Debugging Tools: Use debugging tools or SQL trace to analyze the SQL statement being executed and identify the exact cause of the error.
  
  By following these steps, you should be able to resolve the DDLS150 error and successfully execute your SQL statement.