clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Do not lose the rows of a shard that returns no columns
- Bloom filter hash pairs hash the data twice; hashing once is bit-identical and ~11% faster on TPC-H query_21
- Record dataflow statistics on three paths that aggregation was dropping
- Refresh statistics cache for read-only MergeTree tables
- Fix restored access entities not being enforced until the next access change
- Apply a seccomp system call policy to clickhouse-server at startup
- Detach a patch part whose index lost its content to a zeroed block
- Refuse renaming an S3Queue/AzureQueue table whose keeper_path expands {database}, {table} or {uuid}
- Fix toSecond, toStartOfMinute, toStartOfHour, date_trunc, toStartOfIn…
- Fix the Iceberg manifest-list partition summary written for bucket partitions
- Docs
- C++ not yet supported