clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `count()`/`sum()` without `GROUP BY` returns zero rows instead of one when a single-shard `Distributed`/`Remote` table's only shard is skipped via `skip_unavailable_shards`
- Expand `url` glob patterns lazily
- Fix integer underflow in MySQL protocol handshake
- [CI crash] Transaction log finalize failed during commit
- [RFC] Text index: columnar front coding and `dictionary_block_encoding` parameter
- ReplicatedMergeTree replica becomes permanently readonly (Code 122) when power loss reverts an applied ALTER's local metadata commit; force_restore_data / RESTART REPLICA / RESTORE REPLICA all fail to recover
- [RFC] Text index: fuzzy token search (typo-tolerant)
- Allow unknown settings in query plan serialization
- Parquet: size the initial footer read to 1% of the file within [128 KiB...2 MiB]
- Report accepted_rows/accepted_bytes in X-ClickHouse-Summary for async inserts
- Docs
- C++ not yet supported