How To Fix MC804 - View field & in & union select: Make the constant shorter

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 804

• Message text: View field & in & union select: Make the constant shorter

What causes this issue?

A view containing a union and constants was defined in the selections.
The corresponding view fields for working in the ABAP environment are
determined using the type specification in the first selection of the
union. In the specified selection of the union, however, a larger
constant is defined.

System Response

The view will not be activated or checked successfully.

How to fix this error?

The length of a column or constant in selections must be in accordance
with the defined column of the first selection.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC804 - View field & in & union select: Make the constant shorter ?

  The SAP error message MC804 typically occurs in the context of SAP's reporting and data extraction processes, particularly when dealing with queries or reports that involve a union select statement. The error message "View field & in & union select: Make the constant shorter" indicates that there is an issue with the length of a constant value being used in the SQL query.
  Cause:
  
  Length Exceedance: The error is usually caused by a constant value in the SQL query that exceeds the maximum allowed length for that field. This can happen if you are trying to filter or select data based on a string that is too long for the database to handle.
  Data Type Mismatch: If the data type of the field in the database does not match the data type of the constant being used, it can also lead to this error.
  Incorrect Query Construction: The way the SQL query is constructed may lead to overly long constants being generated, especially in union select statements.
  
  Solution:
  
  Shorten the Constant: Review the SQL query and identify the constant values being used. Shorten these values to ensure they fit within the allowed length for the respective fields.
  Check Data Types: Ensure that the data types of the constants match the data types of the fields in the database. If necessary, convert the constants to the appropriate data type.
  Modify the Query: If the query is constructed dynamically, check the logic that generates the constants and ensure it does not produce excessively long values.
  Use Subqueries: If applicable, consider breaking down the query into smaller subqueries that can handle the data more efficiently without exceeding length limits.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error. Sometimes, SAP releases notes that address known issues with specific versions of the software.
  Database Documentation: Refer to the database documentation for the maximum length of fields and constants to ensure compliance.
  Performance Considerations: Be aware that overly complex queries or those with large constants can lead to performance issues. Simplifying the query can improve performance as well as resolve the error.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or ABAP team for further investigation and assistance.