Keeping Raw Data You May Be Asked to Delete

Tue, 13 Oct 2026 00:00:00 -0400

Your first job on an erasure request is a search: where does this person’s data sit? For a customer with one online order, the example estate in this series holds it in more than twenty places across the source database, the lakehouse, and the records around it. Some are obvious, such as the orders table and its bronze copy. Others are easy to miss: the change tables that feed replication, a month-end snapshot, the text of a query someone ran to look into a refund, and the table that caught a pipeline error. Each has its own rule for how long data stays after a delete, and several keep it for weeks after the DELETE statement succeeds.

Series-Lakehouse-in-Production on Sakura Sky: Cloud, Data, Security

Keeping Raw Data You May Be Asked to Delete