ClickHouse Changelog

Backward Incompatible Changes

• The analyzer can no longer be disabled; enable_analyzer / allow_experimental_analyzer are obsolete.
• Default compression changed from LZ4 to ZSTD(3) (size-aware for MergeTree column data: LZ4 below 100 MB, ZSTD(3) at or above). -…

Backward Incompatible Changes

Backward Incompatible Changes

Backward Incompatible Changes

Backward Incompatible Changes

• Fixed sumCount aggregate function unable to read older serialized states after introduction of Nullable(Tuple)
• Fixed exception in tuple comparison involving Nothing type with GROUPING SETS and ORDER BY
• Fixed non-deterministic uncompressed_hash computation for…

Multiple bug fixes including:

Add information about deferred filters as a separate item to EXPLAIN query output. Enable type_json_allow_duplicated_key_with_literal_and_nested_object by default to avoid errors about duplicated keys during JSON parsing. Keeper improvement: find_super_nodes command is more…

Performance Improvements:

• Allow read-in-order optimization and primary-key pruning with Nullable CAST target types for monotonic conversions
• Allow index pruning and filter pushdown when comparing integral columns with float literals
• Added SLRU cache for Parquet…