clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Iceberg: do not flag expired originating snapshot_id as spec violation
- Tolerate oversized alpha_map on topK String state read
- Update version_date.tsv and changelog after v26.2.17.31-stable
- Fix SQL injection in ExternalQueryBuilder via incorrect string escaping
- Add test: `ToShortest` fallback in `formatReadable` is reachable but untested across the suite
- Add test: Precedence of `--output-format`/`--format` over `--vertical` in `setDefaultFormatsAndCompressionFromConfiguration` is untested
- Add test: ORC writer BINARY-type schema path (`output_format_orc_string_as_string=0`) untested after default flip to 1
- jemalloc: try oversize_threshold:64MiB
- Add test: `StorageSetOrJoinBase::restore` ascending file-order restore is untested by stateless SQL
- Add test: `ATTACH PARTITION ALL FROM` with empty source and self-attach (`src=dst`) untested for `MergeTree`
- Docs
- C++ not yet supported