Big Data Technology Tribe

Mar 22, 2026 · Big Data

How Dremel Encodes Nested Data: Definition & Repetition Levels Explained

This article breaks down Dremel's columnar encoding for nested data, detailing the definition‑level and repetition‑level concepts, showing step‑by‑step examples of encoding and reconstructing JSON‑like schemas, and explaining the limits of single‑column reconstruction.