clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Extend 04064_inline_insert_data and randomize send_table_structure_on_insert_with_inline_data (follow-up to #101034)
- Hypothetical (WHAT-IF) indexes
- Add paimon metadata cache
- Query throughput plateaus at ~450-480M rows/sec regardless of thread count on r8g.48xlarge (Graviton4)
- `canFallbackToStringReplacement` allows fallback even when replacement contains `\0` substitution reference
- `tryOptimizeAndEqualsNotEqualsChain` loses type info when converting notEquals chain to NOT IN, causing wrong results with Date columns
- `dictionary_validate_primary_key_type` rejects `LowCardinality(UInt64)` due to missing `removeLowCardinality` unwrap
- Preserve LowCardinality in nested() and ARRAY JOIN over Nested columns
- `s3()` fails to read parquet files from zip archive in S3 when zip entry is not compressed
- AddressSanitizer: heap-use-after-free (STID: 0988-3351)
- Docs
- C++ not yet supported