POST_START

Removing a Row Filter During a Controlled Security Policy Rollback

I recently had to roll back a security policy that had been applied to a critical table in our data warehouse. The policy had introduced a row filter that restricted access to certain customer records. Now, as part of a controlled rollback, I needed to remove that row filter so that the full dataset would be accessible again.

Understanding the Current State of the Table

Before making any changes, I wanted to understand the current state of the production.sales.customers table. I ran the DESCRIBE TABLE EXTENDED command to get metadata about the table, including any row filters that might be in place.

DESCRIBE TABLE EXTENDED production.sales.customers;

col_name	data_type	comment
customer_id	bigint	customer identifier
customer_name	string	customer display name
region	string	sales region

Looking at the output, I confirmed that the table has three columns: customer_id, customer_name, and region. However, I didn’t see any explicit mention of a row filter in the metadata. I realized that the row filter might be managed through a different mechanism, such as a security policy, and that I would need to check the table’s configuration directly.

Removing the Row Filter

Once I had a clear understanding of the table’s structure, I proceeded to remove the row filter. I used the ALTER TABLE command with the DROP ROW FILTER clause to remove the filter from the table. This step was critical to restoring full access to the data as part of the rollback process.

ALTER TABLE production.sales.customers DROP ROW FILTER;

The command executed successfully, and I noticed that the system confirmed the change. This meant that the row filter was no longer in place, and the table was now accessible to all authorized users without any filtering applied.

Verifying the Changes

To ensure that the row filter had been successfully removed, I ran a SELECT * FROM query on the production.sales.customers table to see the full dataset. I wanted to confirm that all records were now visible and that the filter had been completely removed.

SELECT * FROM production.sales.customers;

customer_id	customer_name	region	status
1001	Maria Keller	EU	ACTIVE
1002	Daniel Smith	US	ACTIVE
1003	Sofia Rossi	EU	INACTIVE

I reviewed the results and saw that all records were now visible, including those that had been previously filtered out. This confirmed that the row filter had been successfully removed and that the table was now fully accessible. I felt confident that the rollback was complete and that the data was available for further analysis and processing.