Data engineering
Maps columns from a source to a warehouse table, reads a query for how much data it scans, and plans a schema change as expand then contract. A plain-language reading of SQL still lives on Data analysis. This shelf is the pipeline around the query. 3 entries, listed by title.
E
- ETL column contract · listed — Writes a source-to-target column contract with types, nulls, and a grain.
S
- Schema expand and contract · listed — Plans a schema migration as expand, migrate, then contract so old readers keep working.
W
- Warehouse scan review · listed — Reads a warehouse query for partition filters, unbounded joins, and select-star scans.