clickhouse
https://github.com/clickhouse/clickhouse
C++
ClickHouse is a free analytics DBMS for big data
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- Issues
- improve EXPLAIN PLAN \ PIPELINE to show which data skip indexes will use to execute query
- A list of benchmarks
- TTL GROUP BY / DB::Exception: Not found column toStartOfHour(Timeslot) in block.
- ReplicatedMergeTree replica template is hardcoding database and table names after upgrade from 20.7.2.30 to 21.1.2
- ssl_cert, ssl_key, ssl_ca options for MYSQL engine is not documented
- Bitmap querying optimization
- [RFC] Limited support for transactions in MergeTree tables
- Finalize aggregations at field boundaries by taking advantages of ordering
- Upload Logs that Fail to Parse as a String in a Specified Table
- windowFunnel: same event gets counted twice
- Docs
- C++ not yet supported