clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- LowCardinality vs index_granularity
- Segfault in SortCursor::greaterAt
- Text index postprocessor
- Intermittent data loss after DETACH TABLE / ATTACH TABLE with partitions attached from another table
- ClickHouse: MEMORY_LIMIT_EXCEEDED. jemalloc.resident 19.17GB, RES in top is 5GB
- Add FINAL BY syntax for coarse-grained merge in AggregatingMergeTree and SummingMergeTree
- ARRAY JOIN in Projection Index
- added server setting in poco utils
- Optimize single-element IN to equality comparison
- DeltaLake read from S3 fails with DELTA_KERNEL_ERROR in ClickHouse 26.2.4 after ~110M rows, works in 25.7
- Docs
- C++ not yet supported