How To Fix AD612 - Table & already contains tables: Class cannot be changed

AD612 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 612

• Message text: Table & already contains tables: Class cannot be changed

What causes this issue?

You want to change the table type of a table pool already containing
pooled tables. This is not allowed.

System Response

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

How to fix this error?

Please check whether this change is necessary.
If it is, you should delete all pooled tables from this pool.
You cannot delete pooled tables whilst they contain data.

Error message extract from SAP system. Copyright SAP SE.

AD612 - Details

• The SAP error message AD612 indicates that you are trying to change the class of a table that already contains data. This is a restriction in SAP to ensure data integrity and consistency. When a table is created, it is assigned a specific class (e.g., transparent table, pooled table, etc.), and changing this class after data has been inserted can lead to complications.
  
  Cause:
  The error occurs when:
  
  You attempt to change the table type (class) of a database table that already has entries.
  The system prevents this change to avoid potential data loss or corruption.
  
  
  Solution:
  To resolve this issue, you can follow these steps:
  
  
  Check Table Contents: Verify if the table indeed contains data. You can do this by executing a simple SELECT query in the database.
  
  
  Delete Data: If the table contains data that you can afford to lose, you can delete all entries from the table. This can be done using a DELETE statement