How does DB2 handle updates to tables with indexes?
- DB2 handles updates to tables with indexes by first locking the index pages related to the affected rows, then updating the table data, and finally updating the index entries accordingly.
- DB2 manages updates to tables with indexes by temporarily disabling the indexes, performing the updates on the table, and then rebuilding the indexes.
- DB2 updates the indexes concurrently with the table updates, ensuring that the indexes remain synchronized with the table data.
- Updates to tables with indexes in DB2 are handled by maintaining consistency between the data in the table and the index.
DB2 employs a method of locking index pages during updates to ensure consistency between the table data and the index entries. This approach minimizes the risk of data inconsistencies and ensures that queries accessing the index return accurate results. Understanding how updates are managed in tables with indexes is crucial for optimizing performance and maintaining data integrity in DB2 environments.
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