kurtqq commented on issue #4610: [AIRFLOW-3783] Switch to HEADER option being provided already by Redshift URL: https://github.com/apache/airflow/pull/4610#issuecomment-494095515 @ashb It's auto/forcibly update: `Amazon Redshift provides a setting, Allow Version Upgrade, to specify whether to automatically upgrade the Amazon Redshift engine in your cluster if a new version of the engine becomes available. This setting doesn't affect the database version upgrades, which are applied during the maintenance window that you specify for your cluster. Amazon Redshift engine upgrades are major version upgrades, and Amazon Redshift database upgrades are minor version upgrades. You can disable automatic version upgrades for major versions only. For more information about maintenance windows for minor version upgrades, see Maintenance Windows. ` https://docs.aws.amazon.com/redshift/latest/mgmt/working-with-clusters.html The 1.0 is the cluster version which the user can control if he wants to update or not. but the user have no control over the database version update. Redshift force update this in the maintenance windows. Since all users run the same cluster version (1.0) this PR is safe to be merged in my opinion.
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