clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Protobuf Output Converts "" and 0 to NULL for Nullable columns
- Parse PromQL octal numeric literals
- [WIP] Part manifest prep - extract storage components
- Flaky test `04408_lazy_materialization_part_offset_prewhere` on 26.3 backport PRs (26.3 lacks #96682)
- Reuse column buffers for Array-typed min/max/any/argMin/argMax states
- Push down catalog filters for system.iceberg_history
- AST fuzzer (arm_asan_ubsan): server dies with SIGSEGV and no sanitizer report while a fuzzed query connects via `remoteSecure` to a loopback address
- [CI crash] Incorrect type cast during serialization
- Do not rewrite a plan that already carries a coordinated read
- Fix a dropped checksum entry when a mutation's rename map is a permutation
- Docs
- C++ not yet supported