clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Drop the rows of a source's pipeline header in one place
- Keeper silently hands out a new session in place of the old one on reconnect — a ZooKeeper client never learns that its session has expired
- Fix dropped rows and `LOGICAL_ERROR` for a primary-key condition with a widening integer cast
- Wrong results for `ORDER BY <float> LIMIT n` with `nan` values under top-k optimizations
- Fix Parquet pruning dropping rows that hold a NaN, and write the mandatory nan_count statistic
- Merging a cross-type equality into a join condition changes its semantics for float supertypes (-0.0 stops matching 0)
- Do not report a concurrent backup when our own lock-file write committed
- Resolve a subcolumn name to the declared substream, then to a dynamic one
- Flaky test: test_storage_nats/test_nats_jet_stream.py::test_nats_restore_failed_connection_without_losses_on_write
- Do not let one unreachable remote database break `system.tables` for everyone
- Docs
- C++ not yet supported