clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Proposal: Global Replica Error Count for Improved Load Balancing in Distributed Queries
- max_udf_block_size setting to tune chunk size for UDF functions
- Workload CPU scheduling for merges and mutations
- Sentry clickhouse boundless disk usage
- Allow skip null values when serailize tuple with JSONEachRow format
- Easy way to track the schema of a JSON column
- INSERT into URL table engine (at least) does not write to files when no rows are selected
- 02883_zookeeper_finalize_stress is flaky
- Assertion contrib/orc/c++/src/io/Cache.cc:101: static std::vector<ReadRange> orc::ReadRangeCombiner::coalesceReadRanges(std::vector<ReadRange>, uint64_t, uint64_t): Assertion `rangeSizeLimit > holeSizeLimit' failed
- No info in system.query_views_log when MV inserts into kafka engine table
- Docs
- C++ not yet supported