clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add hierarchical merging for MergingSortedTransform
- Add `skip_distributed_ddl` option to cluster replica config
- 4lw command to read histograms
- deltaLakeAzure throws NOT_IMPLEMENTED (Code 48) on schema-evolved tables
- date_time_overflow_behavior='throw' silently ignored for Int/UInt/Float -> DateTime64 and Time64 casts
- ReplicatedMergeTree: CHECK TABLE fails after fetching part with unknown projection (re-fetch loop)
- Add small-parts batching settings to SimpleMergeSelector
- Disable read-in-order when primary key selectivity is poor
- Parallelize read-in-order from a single part with PrefetchingConcatProcessor
- Add symbols and lines to error tables
- Docs
- C++ not yet supported