clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- When executing the ATTACH partition file operation in ClickHouse, the server's memory usage decreases significantly.
- Implement AVX512BW versions for random data generation
- Lightweight delete disable the trivial count optimization forever (don't work even after table optimize & reattach)
- Support excluding columns in clickhouse-obfuscator
- prefer_global_in_and_join has different behaviour with experimental_analyzer with non-distributed tables.
- Unable to pass argument containing space to the 'executable'
- Subquery and main query can read from different set of data parts of a single MergeTree table with ongoing inserts
- Single thread is always used to prepare data set for executable tableUdf
- Restore usage of managed identity credential in backups in Azure
- Refactor TempDataOnDisk
- Docs
- C++ not yet supported