ClickHouse Release 24.12

ClickHouse version 24.12 introduces several new features, including Enum usability improvements, Iceberg REST catalog and schema evolution support, reverse table ordering, and the ability to use JSON subcolumns as a primary key. The new release also improves JOIN performance with parallel hash join by default, automatic join reordering, optimization of JOIN expressions, and non-equi JOINs supported by default. Additionally, ClickHouse's new powerful JSON implementation stores the values of each unique JSON path in a true columnar fashion, allowing high data compression and maintaining query performance seen on classic types. The release also welcomes several new contributors to the ClickHouse community.

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