How To Fix SV090 - The compare operator is only permitted for character fields

SAP Error Message - Details

• Message type: E = Error

• Message class: SV - View Maintenance: Customize Messages

• Message number: 090

• Message text: The compare operator is only permitted for character fields

What causes this issue?

In the definition of the selection condition, you have, for one field,
used a compare operator, which can only be used for character fields
(for example, "CP" search). The current field is not a character field.
The internal system representation of the field contents therefore
deviates from the external representation on the screen. Comparisons,
which assume that internal and external respresentation of the field
contents are identical, cannot be performed. The specified selection
cannot therefore be evaluated.

System Response

The entries were not accepted.

How to fix this error?

Specify a permitted compare operator. To display permitted operators,
select F4.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SV090 - The compare operator is only permitted for character fields ?

  The SAP error message SV090, which states "The compare operator is only permitted for character fields," typically occurs when there is an attempt to use a comparison operator (like =, <>, <, >, etc.) on a field that is not of a character type. This can happen in various contexts, such as ABAP programming, selection screens, or database queries.
  Cause:
  
  Data Type Mismatch: The most common cause of this error is that the field being compared is not a character field (e.g., it might be a numeric, date, or other non-character type).
  Incorrect Field Usage: The field might be used in a context where a character comparison is expected, but the actual data type does not support it.
  Implicit Type Conversion: Sometimes, implicit type conversion may not occur as expected, leading to this error.
  
  Solution:
  
  Check Data Types: Verify the data types of the fields involved in the comparison. Ensure that both fields are of character type (e.g., CHAR, STRING).
  Explicit Conversion: If you need to compare a non-character field with a character field, consider converting the non-character field to a character type using appropriate conversion functions (e.g., CONCATENATE, WRITE, or type casting).
  Modify the Logic: If the comparison is logically incorrect (e.g., comparing a date with a string), adjust the logic to ensure that the comparison is valid.
  Debugging: Use debugging tools to trace the execution and identify where the type mismatch occurs. This can help pinpoint the exact line of code or query causing the issue.
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with the different data types in ABAP and their characteristics. Understanding how to work with character, numeric, and date types is crucial.
  SAP Documentation: Refer to the official SAP documentation for more details on data types and comparison operators.
  Error Handling: Implement error handling in your code to gracefully manage situations where type mismatches might occur.
  
  By addressing the data type issues and ensuring that comparisons are made between compatible types, you should be able to resolve the SV090 error.