Sigma Computing incident
Input Table Edits Failing if customer updated warehouse connection
Sigma Computing experienced a notice incident on September 10, 2026, lasting 23h 18m. The incident has been resolved; the full update timeline is below.
Update timeline
- identified Sep 10, 2026, 06:24 PM UTC
We've identified an issue causing edits to existing input tables to fail on certain connections using OAuth authentication when connection was changed from non-OAuth connection. Impact: Some customers are unable to save edits to existing input tables on affected connections. Next Steps: We are reverting the change that introduced this regression and are working to restore writeback on input tables for the affected connections. We will post another update once a fix has been deployed. We apologize for the inconvenience and will continue to update this page as we make progress!
- identified Sep 10, 2026, 07:18 PM UTC
We have reverted the issue, customers can now change their warehouse connection Auth Method without breaking input tables. We are still working to restore writeback on input tables for the affected connections. We will post another update once the input tables have been restored. We apologize for the inconvenience and will continue to update this page as we make progress!
- identified Sep 10, 2026, 10:43 PM UTC
We've identified an issue causing edits to existing input tables to fail on certain connections using OAuth authentication when connection was changed from non-OAuth connection. Our engineering team is now testing a fix in internal environments. We'll share another update once writeback is fully restored. Thanks for your patience! We'll keep this page updated as we progress.
- identified Sep 11, 2026, 12:37 AM UTC
Customers can now change auth methods safely. However we are still restoring the effected customers who are unable to make edits to input tables. We will post another update once the input tables have been restored. We apologize for the inconvenience and will continue to update this page as we make progress!
- identified Sep 11, 2026, 02:37 AM UTC
Customers can now safely change warehouse connection auth method. We are still restoring the impacted customers who are unable to make edits to input tables that were created prior to the auth method change. We will post another update once the input tables have been restored. We apologize for the inconvenience and will continue to update this page as we make progress.
- monitoring Sep 11, 2026, 04:14 AM UTC
Our engineers have implemented mitigation measures to circumvent the issue and we are monitoring their effect closely. Customers can now safely change warehouse connection auth method and make input table edits.
- monitoring Sep 11, 2026, 05:51 PM UTC
We applied a mitigation and are monitoring its effect closely. Customers can now safely change warehouse connection auth method and make input table edits. We'll share our next update in 4 hours. Thanks for your patience.
- resolved Sep 11, 2026, 10:01 PM UTC
The mitigation measures have proven effective, and the issue is resolved. We will perform a root cause analysis (RCA) and publish our findings in a postmortem note to the Sigma Community site in coming days.