clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `skip_unavailable_shards = 1` now silently skips a healthy shard whose query fails with UNKNOWN_TABLE / UNKNOWN_DATABASE (26.7+)
- Keeper connection over TLS freezes when a large request is sent while large replies are arriving; session is lost, replicated tables go read-only
- UPDATE of a column read by the `DEFAULT` of a missing sort-key column breaks the sort order of the part
- Apply `distributed_product_mode` to an `IN` pushed down into a subquery/view over a Distributed table
- Do not hold the SSL lock of a secure socket while waiting for the socket (fixes secure Keeper client stalls)
- Bound the waits of the gRPC fatal error callback on the signal listener thread
- Fix `text` and `tokenbf_v1` indexes dropping rows for a `LIKE` pattern with invalid UTF-8
- Apply `-WithMemoryTracking` containers to `src/Processors/QueryPlan`
- Run the bfloat16 performance test queries on 300 million rows
- Replace the window function performance queries above 1 s with smaller copies
- Docs
- C++ not yet supported