How To Fix MC817 - Operator & is not allowed in a join condition

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 817

• Message text: Operator & is not allowed in a join condition

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MC817 - Operator & is not allowed in a join condition ?

  The SAP error message MC817 ("Operator & is not allowed in a join condition") typically occurs in the context of SAP BW (Business Warehouse) or when working with queries in SAP systems. This error indicates that there is an issue with the way a join condition is defined in a query or a data model.
  Cause:
  The error is caused by the use of an invalid operator in a join condition. In SQL and many query languages, certain operators are not allowed in join conditions. The & operator is not a valid operator for joins in SAP BW queries or in SQL in general. Join conditions typically use operators like =, <, >, <=, >=, and <>.
  Solution:
  To resolve the error, you should:
  
  
  Review the Join Condition: Check the join condition in your query or data model. Look for any instances of the & operator and replace it with a valid operator. 
  
  
  Use Valid Operators: Ensure that you are using appropriate comparison operators. For example, if you are trying to check for equality, use = instead of &.
  
  
  Check for Syntax Errors: Sometimes, the error may arise from a syntax issue. Ensure that the overall syntax of your query or join condition is correct.
  
  
  Test the Query: After making changes, test the query to ensure that it runs without errors.
  
  
  Consult Documentation: If you are unsure about the correct syntax or operators to use, refer to the SAP documentation or help resources for guidance on constructing join conditions.
  
  
  Related Information:
  
  SAP BW Query Designer: If you are using the Query Designer, ensure that you are familiar with the interface and how to properly define joins.
  SQL Syntax: Understanding basic SQL syntax can help in constructing valid queries and join conditions.
  SAP Notes: Check SAP Notes for any specific issues related to your version of SAP BW or any known bugs that might be causing this error.
  
  By following these steps, you should be able to resolve the MC817 error and successfully execute your query or data model.