clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Do not use a skip index for `has(<constant array>, <column>)` when it holds per-element hashes
- Fix DeltaLake decimal partition values being written without scale and read back wrong
- Fix stale forwarded background action locks
- Release pull request for branch 26.9
- Iceberg `uuid` bounds decoded raw: min/max pruning drops rows that exist
- Shippable-set check is one level deep: a nested `IN` set escapes it and breaks serialization
- Try to drain a socket and return it to pool instead of closing
- Schema inference: an integer past the inference sample is silently wrapped into the sampled type — ClickHouse cannot read back its own CSV export of a UInt64 column
- serializeSortDescription writes `alias` only for WITH FILL columns
- optimize_redundant_functions_in_order_by drops an ORDER BY term under WITH CUBE / ROLLUP / GROUPING SETS, returning wrong row order — and wrong rows under LIMIT
- Docs
- C++ not yet supported