DDLS105 - In the On condition, only the operator Equals is supported

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 105

• Message text: In the On condition, only the operator Equals is supported

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS105 - In the On condition, only the operator Equals is supported ?

  The SAP error message DDLS105 indicates that there is an issue with the use of the "ON" condition in a SQL statement, specifically in the context of a join operation. The error message states: "In the ON condition, only the operator Equals is supported." This means that when defining the join condition between two tables, you can only use the equality operator (=) to specify how the records from the two tables relate to each other.
  Cause:
  The error occurs when you attempt to use a non-equality operator (such as <, >, <=, >=, <>, etc.) in the ON clause of a join statement. In SAP HANA and certain other database systems, the join conditions must be based on equality to ensure that the join operation is well-defined and efficient.
  Solution:
  To resolve this error, you need to modify your SQL statement to ensure that all conditions in the ON clause of your join use the equality operator. Here’s how you can do that:
  
  
  Review the SQL Statement: Look at the SQL statement where the error occurred and identify the ON clause.
  
  
  Change Non-Equality Operators: Replace any non-equality operators with the equality operator. For example, if you have:
  SELECT * FROM TableA AS A
  JOIN TableB AS B ON A.id > B.id
  You should change it to something like:
  SELECT * FROM TableA AS A
  JOIN TableB AS B ON A.id = B.id
  If you need to filter based on conditions that are not equality, consider using a WHERE clause after the join.
  
  
  Use a Different Join Type: If your logic requires a non-equality condition, you may need to rethink your approach. For example, you might need to perform a cross join and then filter the results in a WHERE clause, but be cautious as this can lead to performance issues with large datasets.
  
  
  Related Information:
  
  Join Types: Understand the different types of joins (INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL OUTER JOIN) and how they work with equality conditions.
  SQL Syntax: Familiarize yourself with the correct SQL syntax for joins in SAP HANA or the specific database you are using.
  Performance Considerations: Using non-equality conditions in joins can lead to performance issues, so it's essential to design your queries efficiently.
  
  By ensuring that your join conditions only use the equality operator, you should be able to resolve the DDLS105 error and successfully execute your SQL statement.