clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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Help out
- Issues
- Skip writing all-default columns during MergeTree INSERT
- ClickHouse Keeper may trigger excessive Transparent Huge Page (THP) PMD collapse inside Docker
- Make the sourceless-`ColumnNode` invariant explicit in `CreateUniqueArrayJoinAliasesVisitor`
- Add DATABASE NAMESPACE clause for multi-tenant database isolation
- Subqueries inside transformations of materialized views
- FR: option to disable all system log tables
- Uncompressed size of empty JSON columns with advanced shared data is quite large
- Initiator query remains running and is unkillable when using icebergS3Cluster and underlying tasks have timeout
- Feature Request: Support JsonRemove function
- Estimate read filter selectivity by sampling on a small set of rows from table
- Docs
- C++ not yet supported