> ## Documentation Index
> Fetch the complete documentation index at: https://docs.jedify.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Check Changes in the Semantic Catalog

# Check Changes

The **Check Changes** feature detects structural drift between your live data warehouse and the existing semantic catalog.

When triggered, Jedify scans for changes at:

### Table Level

* New or removed columns
* Changes to partitioning keys
* Changes to clustering keys

### Column Level

* Columns added or removed
* Column type changes

### What Happens After the Scan

Once the scan completes:

* Visual indicators and notifications highlight where changes were detected
* Affected items in the UI show icons or markers
* The catalog updates static metadata needed for accurate modeling
* New columns, if detected, are automatically added into the catalog structure

Check Changes **does not update semantic logic, labels, grounding, or entity links**—it updates only the structural metadata used by the catalog.

This ensures your semantic view stays in sync with the warehouse, even as schemas evolve.