2 min lesson
Lineage is impact analysis
Rebuild the parts of "Lineage is impact analysis", then say why each one matters.
Step 1 of 2
Lineage is impact analysisthe difference between a 5-minute and 5-hour incident
When a bronze table breaks, the first question is who consumes it. Without lineage you find out by getting paged by each downstream owner in turn. With lineage you query the graph, see the eleven silver assets and the one revenue dashboard hanging off it and decide blast radiusHow much breaks if a change goes wrong; the scope of potential damage. Press Enter for the full definition. in one look.
- Impact analysis
- One broken source resolves to its full downstream set instantly
- Root cause
- A bad gold number traces back up to the exact bronze asset that drifted
- Change safety
- Before you alter a schema, you see everyone who'll feel it
- Trust
- Stakeholders can ask "where did this number come from" and get a real answer
An agent can walk that graph for you. A finance team hit discrepancies in a revenue-recognition booking table that sits downstream of five or six upstream tables plus the jobs running between them. They pointed Cursor at the bad number and it traced the reconciliation issue back up the chain - which tables feed which, which jobs produce which outputs, whether snapshots existed and which PRs changed how each table gets built. It walked the whole history to the furthest upstream source.
This is the senior version of root-cause: not just that lineage exists, but using an agent to traverse it across tables, jobs, snapshots and the PRs that changed them.
"We're actually able to trace back the reconciliation issues all the way back to the furthest upstream table using Cursor."