clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- More virtual columns for the S3 storage
- `merges_mutations_memory_usage_to_ram_ratio` use total physical memory, not cgroups limited one
- Clickhouse returns `FILE_DOESNT_EXIST` for hdfs path with wildcards when using `HAVING`
- Preserve blobs when zero copy lock does not exist
- if clickhouse have multi-partition, how to drop one partition column
- `Assertion `getOperand(0)->getType() == getOperand(1)->getType() && "Both operands to ICmp instruction are not of the same type!"' failed`
- Fix stuck while processing pending batch for async distributed INSERT
- UPDATE mutation targets all the parts of the table despite specifying a partition ID on replicatedmergetree
- DateTime64 parser bug
- Clickhouse Cluster - How many keeper nodes?
- Docs
- C++ not yet supported