How To Fix DA521 - Full text index &-&: Deletion of a column causes DROP index

SAP Error Message - Details

• Message type: E = Error

• Message class: DA - Dictionary: Compare, distribution, timer, instantiation

• Message number: 521

• Message text: Full text index &-&: Deletion of a column causes DROP index

What causes this issue?

A CHAR column is being deleted from the table. A full text index is
defined here. However, the change to the column can only be made if the
index is deleted beforehand.

System Response

The index is deleted before execution of the statement for the column.
No action is necessary.

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 DA521 - Full text index &-&: Deletion of a column causes DROP index ?

  The SAP error message DA521 indicates an issue related to the full-text index in the context of database operations. Specifically, it occurs when a column that is part of a full-text index is deleted, which subsequently leads to the dropping of that index. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Column Deletion: The error arises when you attempt to delete a column from a database table that is part of a full-text index. The full-text index relies on the data in that column to function correctly.
  Index Dependency: Full-text indexes are dependent on the columns they are created on. If a column is removed, the index can no longer be maintained, leading to its automatic deletion.
  
  Solution:
  
  Review Index Dependencies: Before deleting a column, check if it is part of any full-text index. You can do this by reviewing the database schema or using database management tools to inspect the indexes associated with the table.
  Drop the Index Manually: If you intend to delete the column, consider dropping the full-text index manually before proceeding with the column deletion. This can be done using SQL commands specific to your database system.
  Recreate the Index: After deleting the column, if you still need the full-text index on other columns, you can recreate it. Ensure that the new index definition does not include the deleted column.
  Database Documentation: Always refer to the database documentation for specific commands and procedures related to managing indexes and columns.
  
  Related Information:
  
  Database Management: Understanding how full-text indexes work and their dependencies is crucial for effective database management.
  SAP Notes: Check SAP Notes and Knowledge Base Articles for any specific guidance or updates related to this error message.
  Testing in Development: Always test schema changes in a development environment before applying them to production to avoid unintended consequences.
  Backup: Ensure that you have a backup of your database before making structural changes, such as deleting columns or indexes.
  
  By following these guidelines, you can effectively manage the full-text indexes in your SAP environment and avoid encountering the DA521 error.