clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Analyzer: replace ALIAS columns computable from GROUP BY keys in validateAggregates
- Analyzer: compute ALIAS columns from GROUP BY keys after aggregation in the planner
- Fix `DEFAULT` expressions that read a column or subcolumn missing from an old part
- Fix a `JSONAllValues` text index skipping rows of typed JSON paths compared with a constant of another type
- Reject ALTER CLEAR COLUMN that would recalculate a MATERIALIZED key column
- Keep the tables and the replication usable when `DROP DATABASE` is refused
- Fix CTEs and views in parallel-replicas `INSERT SELECT`
- Keep lambda scope when recomputing a MATERIALIZED column in mutations
- Parse small JSON documents without heap allocations when simdjson is disabled
- Honor `SET ROLE` in row policies of remote reads over a cluster without a secret
- Docs
- C++ not yet supported