clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Cherry pick #108464 to 26.3: Add SHOW COLUMNS access check to hasColumnInTable
- Fix HOST LIKE parsing for short IPv6 hextets
- NATS direct SELECT segfaults: `read` re-reads `consumers_connection` after reset
- Flaky test: test_storage_nats/test_nats_jetstream_credentials_rotation.py — `Cannot connect to Nats ... poll error: 4`
- Add test: `ALTER` comment/setting fast paths: metadata-revert-on-failure untested
- keeper-bench SIGABRTs on any request error: `std::abort` swallows the stop path
- Allow flattenable Tuple leaves to participate in Vertical merge
- DeltaLake CREATE with non-Parquet `format` commits unreadable data files
- DeltaLake CREATE accepts `Nullable(Tuple)`, then every NULL INSERT into it fails
- Failed lazy ALTER MODIFY COLUMN to JSON with an incompatible typed path leaves the table with permanently failing merges; KILL MUTATION does not help
- Docs
- C++ not yet supported