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

SV090 - Overview

• 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.

SV090 - Details

• 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