clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Skip writing all-default columns during MergeTree INSERT
- ClickHouse Keeper may trigger excessive Transparent Huge Page (THP) PMD collapse inside Docker
- Revert dangerous change in CreateUniqueArrayJoinAliasesVisitor
- Add DATABASE NAMESPACE clause for multi-tenant database isolation
- Fix HDFS pread int overflow by chunking reads and add HDFS parquet integration tests
- Fix HiveCatalog connection stability with retry mechanism for TTransportException
- Subqueries inside transformations of materialized views
- keeper: respect priority adding multiple keeper nodes
- FR: option to disable all system log tables
- Uncompressed size of empty JSON columns with advanced shared data is quite large
- Docs
- C++ not yet supported