A 2-billion-row Postgres orders fact serves a quarterly report that aggregates two or three columns
A medium Pipeline Design interview practice problem on DataDriven. Write and execute real pipeline design code with instant grading.
- Domain
- Pipeline Design
- Difficulty
- medium
Problem
A 2-billion-row Postgres orders fact serves a quarterly report that aggregates two or three columns per query, but the dashboard takes 18 minutes because Postgres reads every column of every row. Apply the section's columnar-vs-row framing and replace the row-stored fact with a columnar destination so the I/O reduction, compression, and vectorized execution wins all apply.
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