clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- A JOIN that only tests existence can be rewritten to IN when every consumer deduplicates rows: TPC-DS query_37 -90%, query_82 -92%
- Do not record the async-metrics readonly checks in system.errors
- AST fuzzer oracle: do not report a mismatch when the reference read is not reproducible
- Refuse ORDER BY over a Distributed table whose declared type breaks the shards' order
- Pack the standalone WASM SQL parser as an npm tarball
- Validate the argument list of an optimization of `mergeTreeAnalyzeIndexes`
- Record four settings changes in the version block that shipped them
- Do not compile a bit shift or rotate outside its interpreted domain
- Reject invalid characters in HTTP header names
- Vectorized memchr and strlen for x86_64 in libllvmlibc
- Docs
- C++ not yet supported