How To Fix 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

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

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.