Delta Lake V4

Delta Lake 4.0 UniForm + Liquid Clustering 2024.

Definition

Delta Lake 4.0 features: UniForm (table simultaneously accessible as Delta + Iceberg via metadata layer), Liquid Clustering (alternative to partitioning + Z-Order), Deletion Vectors v2, Variant type for semi-structured. Compatible Apache Spark 3.5+ and Spark 4.0. OSS implementations: delta-rs (Rust), delta-spark (Java/Scala), delta-iceberg (UniForm bridge).

Origin

Databricks 2017, donated to Linux Foundation Delta Lake project 2019, Delta Lake 4.0 published 2024.

Usage

Dominant in Databricks ecosystem. UniForm 4.0 reduces lock-in by allowing reads from Snowflake / Trino / Iceberg readers.

Related terms

• Delta Lake — fiche socle.
• Apache Iceberg V3 — concurrent direct.
• Delta UniForm — pont interop.