clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Print invisible characters as escape sequences in Vertical format
- Fix ORDER BY truncation with arrayJoin in GROUP BY queries
- Support floating-point weight in topKWeighted and approx_top_sum
- Fix ARRAY JOIN alias subcolumn resolution in new analyzer
- Fix UNION ALL with duplicate NULL columns causing Block structure mismatch
- Fix datetime parsing consuming characters from adjacent values
- Add test: No test for merge handling in readonly MergeTree refresh (refreshDataParts covers parts by Transaction::commit)
- ReservoirSamplerDeterministic::merge() missing self-merge guard (same bug fixed in ReservoirSampler)
- Fix cancel_http_readonly_queries_on_client_close not working with HTTPS
- Fix ALTER TABLE MODIFY TTL with DateTime causing data loss on 32-bit overflow
- Docs
- C++ not yet supported