DDLS077 - Literals are not permitted on the left side of comparison expressions

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 077

• Message text: Literals are not permitted on the left side of comparison expressions

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS077 - Literals are not permitted on the left side of comparison expressions ?

  The SAP error message DDLS077 indicates that there is an issue with the use of literals in a comparison expression within a Data Definition Language (DDL) statement, typically in the context of ABAP or database views. This error occurs when a literal value (like a string or number) is incorrectly placed on the left side of a comparison operator (like =, <>, <, >, etc.) in a condition.
  Cause:
  The primary cause of this error is the incorrect syntax in a comparison expression. In SQL and ABAP, literals should not be used on the left side of a comparison. Instead, you should use a field or a variable. For example, the following would trigger the error:
  SELECT * FROM my_table WHERE 'literal_value' = my_field.
  Solution:
  To resolve this error, you need to ensure that the left side of the comparison is a field or a variable, not a literal. You can correct the above example as follows:
  SELECT * FROM my_table WHERE my_field = 'literal_value'.
  Related Information:
  
  Context: This error is often encountered when defining database views, creating selection queries, or writing ABAP code that interacts with the database.
  Best Practices:
  
  Always use fields or variables on the left side of comparison expressions.
  Validate your SQL syntax before executing it to catch such errors early.
  Use tools like the ABAP Editor or SQL Console in SAP to check for syntax errors.
  
  
  Documentation: Refer to the SAP Help Portal or ABAP documentation for more details on SQL syntax and best practices.
  
  By following these guidelines, you should be able to avoid the DDLS077 error and write correct comparison expressions in your SAP applications.