lineage

Snowflake table/column lineage: impact analysis, root cause, data discovery, provenance, trust. Triggers: 'what depends on', 'what will break', 'blast radius', 'who uses', 'deprecate', 'before I change', 'affected users', 'downstream', 'cascade', 'root cause', 'trace upstream', 'where does this come from', 'feeds this table', 'sources of', 'column lineage', 'where does [column] come from', 'what uses [column]', 'trace [column]', 'is this trustworthy', 'which table should I use', 'recommend dataset', 'provenance', 'certify', 'verify source'. Also handles questions where users mention external systems (Power BI, Tableau, Sigma, Looker, dbt) — on accounts meeting either of two conditions (Horizon Catalog connectors (Private Preview) enabled, or GET_LINEAGE on a version supporting OpenLineage-sourced entities), lineage results from native-anchored queries automatically include external entities. For value-level data quality (wrong values, failing DMFs) use the data-quality skill first, then this skill to trace upstream. Always read reference/snowflake-apis.md before writing GET_LINEAGE SQL — it has the correct namespace, argument order, and output column names. When external entities appear in results, see reference/external-row-output.md.