How To Fix CLHP028 - Unknown column name in COLUMNS

SAP Error Message - Details

• Message type: E = Error

• Message class: CLHP - Graphical Class Maintenance

• Message number: 028

• Message text: Unknown column name in COLUMNS

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 CLHP028 - Unknown column name in COLUMNS ?

  The SAP error message CLHP028: Unknown column name in COLUMNS typically occurs in the context of SAP HANA or when working with database views or queries in SAP systems. This error indicates that the system is trying to reference a column that does not exist in the specified table or view.
  Causes:
  
  Typographical Error: The column name specified in the query or view might be misspelled or incorrectly referenced.
  Column Renaming: The column may have been renamed or removed from the underlying table or view after the query was written.
  Database Schema Changes: Changes in the database schema (like updates or migrations) may have led to the column being dropped or altered.
  Incorrect Context: The column might exist in a different context or table that is not being referenced correctly in the query.
  View Definition Issues: If the error occurs in a view, the view definition might be outdated or not properly reflecting the underlying tables.
  
  Solutions:
  
  Check Column Names: Verify the spelling and case of the column names in your query against the actual table or view definition.
  Review Schema Changes: If there have been recent changes to the database schema, review those changes to ensure that the column still exists and is correctly referenced.
  Update Views: If the error is occurring in a view, consider refreshing or redefining the view to ensure it reflects the current state of the underlying tables.
  Use Database Tools: Utilize database management tools or SQL clients to explore the schema and confirm the existence of the column.
  Debugging: If you are using a programmatic approach (like ABAP), add debugging statements to check the values being passed to the query.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Refer to the SAP HANA documentation or the specific module documentation for guidance on database queries and views.
  Community Forums: Engage with SAP community forums or support channels for additional insights or similar experiences from other users.
  
  If the issue persists after checking these aspects, consider reaching out to your SAP support team for further assistance.