Schema Radar is Datawise’s post-deployment detection layer. It monitors schema changes across your connected warehouse, classifies them as breaking or safe, and shows you the full downstream blast radius.Documentation Index
Fetch the complete documentation index at: https://docs.trydatawise.com/llms.txt
Use this file to discover all available pages before exploring further.
How It Works
On each ingestion run, Schema Radar:- Fetches the current schema for all tracked tables and views from your connected warehouse.
- Compares it against the schema captured in the previous run.
- Classifies each change: breaking, safe, or additive.
- Resolves downstream impact using your lineage graph.
- Records the change in an immutable history log.
- Tracks mitigation by comparing subsequent ingestion runs.
What Schema Radar Detects
| Change Type | Classification |
|---|---|
| Column removed | Breaking |
| Column renamed | Breaking |
| Data type changed to incompatible type | Breaking |
| Column nullability changed (not null to nullable) | Breaking |
| Table or view dropped | Breaking |
| New column added | Safe (additive) |
Data type widened (e.g., INT to BIGINT) | Safe |
| Table or view created | Safe (additive) |
Downstream Impact
When a breaking change is detected, Schema Radar resolves which downstream assets are affected:- dbt models that
SELECTfrom orref()the changed table. - Tableau workbooks that connect to downstream dbt models or directly to the changed table.
- Power BI reports with connections to affected tables or models.
Mitigation Tracking
After a breaking change is detected, Datawise compares subsequent ingestion runs to determine if the schema has been reverted or a downstream asset has been updated. Mitigation status updates automatically on subsequent runs.Change History
The Schema Radar change history is immutable. Once a change is recorded, it stays in the log — giving you an accurate audit trail of what changed, when, and what was impacted.Viewing Schema Radar
Go to Schema Radar in the left navigation. Filter by asset, change type, date range, or status. Click any change to open the detail view with the full before/after schema diff, downstream impact tree, and mitigation status. From any change, click View in Lineage to open the Lineage view scoped to that specific detection event.Frequently Asked Questions
How often does Schema Radar run?
How often does Schema Radar run?
On the schedule you configure for each warehouse connector. We recommend daily. Trigger a manual run from the Connectors page at any time.
Can I delete a change from the history?
Can I delete a change from the history?
No. Schema Radar history is immutable by design.
Does Schema Radar detect changes to views?
Does Schema Radar detect changes to views?
Yes. View schema changes are detected the same way as table changes.