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You are viewing documentation for Immuta version 2021.1.

For the latest version, view our documentation for Immuta SaaS or the latest self-hosted version.

Schema Monitoring Overview

Audience: Data Owners and Governors

Content Summary: This page outlines the uses of Schema Monitoring and Column Detection in query-backed data sources.


Schema Monitoring is enabled while creating a data source or when editing a data source. It monitors servers for schema and table changes, including when schemas and tables are added or removed, and notifies Data Owners when any changes are made.

Schema Monitoring

When this feature is enabled by a Data Owner, Immuta detects when a new table has been added and automatically creates a new data source. Correspondingly, if a remote table is removed, that data source will be disabled in the console.

Data Owners or Governors can select which users will monitor schema changes, and if more than one user is selected as a monitor, one data source will be created for each of these users.

Schema Monitor

See Create Query-backed Data Source for instructions on enabling it.

Column Detection

Data Owners can also enable Column Detection, which monitors when columns are added or removed and when column types are changed.

Column Detection

When new columns are added to the remote table, Immuta automatically applies the New tag to these columns in the data source, and, since these new columns could contain sensitive data, a seeded New Column Added Global Policy masks them.

New Column Added Policy

Data Owners can then review and approve these changes from the Requests tab of their profile page. Approving column changes removes the New tags from the data source.

Review Schema Changes

See Create a Query-backed Data Source for instructions on enabling Schema Monitoring.