clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- implement generate date array
- `openCgroupv2MetricFile` builds invalid file paths via string concat without separator, silently disabling all `CGroup*` metrics for nested cgroups (e.g. systemd setups)
- Backport #103014 to 26.3: Fix `MULTIPLE_EXPRESSIONS_FOR_ALIAS` in `FuseFunctionsPass` for repeated `quantile` on distributed queries
- Backport #103014 to 26.4: Fix `MULTIPLE_EXPRESSIONS_FOR_ALIAS` in `FuseFunctionsPass` for repeated `quantile` on distributed queries
- Remove and forbid build-time CMake checks
- Add test: `input_format_hive_text_allow_variable_number_of_columns=0` (strict mode) and the extra-columns branch are untested for HIVETEXT
- Add test: `CREATE TABLE ... ENGINE = FuzzQuery(...)` registration paths (happy path + 3 error branches) are entirely untested
- Add test: WHERE filter on overridden `_part` virtual column is untested — PR tests only no-filter and GROUP BY paths
- Switch VectorSearch job to runners with a large disk
- Backport #103834 to 26.2: Reliable key receiving from a chain of keyservers
- Docs
- C++ not yet supported