How To Fix AD631 - Changing table type? Delete data first

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 631

• Message text: Changing table type? Delete data first

What causes this issue?

The table type was changed from POOL/CLUSTER to INTTAB. However, the
pooled/cluster table contains data which must be deletion prior to
activation.

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?

Delete the data from the pooled/cluster table using the database
utility.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD631 - Changing table type? Delete data first ?

  The SAP error message AD631, which states "Changing table type? Delete data first," typically occurs when you attempt to change the structure or type of a database table that already contains data. This is a safeguard mechanism in SAP to prevent data loss or corruption.
  Cause:
  
  Table Type Change: You are trying to change the type of a table (e.g., from transparent to pooled or cluster) or modify its structure in a way that is incompatible with the existing data.
  Existing Data: The table already contains data, and SAP requires that the data be deleted before making such structural changes.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Backup Data: Before making any changes, ensure that you back up the existing data in the table. You can export the data to a file or another table for safekeeping.
  
  
  Delete Data: If you are sure that you want to proceed with the change and do not need the existing data, you can delete the data from the table. This can be done using a DELETE statement in an ABAP program or through transaction codes like SE11 (Data Dictionary) or SE14 (Database Utility).
  Example SQL command:
  DELETE FROM <table_name>;
  
  
  Change Table Type: After deleting the data, you can proceed to change the table type or structure as needed.
  
  
  Reinsert Data: If you backed up the data, you can now reinsert it into the table after the structural changes have been made.
  
  
  Check Dependencies: Ensure that there are no dependencies or references to the table that might be affected by the change.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11 (Data Dictionary), SE14 (Database Utility), and SE80 (Object Navigator) for managing database tables.
  Documentation: Refer to SAP documentation for guidelines on changing table types and the implications of such changes.
  Testing: Always test changes in a development or quality assurance environment before applying them to production to avoid unintended consequences.
  
  Important Note:
  Changing the structure of database tables can have significant implications for your SAP system. It is advisable to consult with your SAP Basis or ABAP team before making such changes, especially in a production environment.