clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add two-model mode to continue-all-prs script
- Scope WITH aliases to the SELECT that declares them when adding the default database
- Fix File row policy / PREWHERE breaking DEFAULT columns missing from the data file
- Fix TopK filtering dropping NULL and NaN rows from the answer
- Convert OUTER join to INNER join by null-rejecting join conditions
- Extract reusable `ActionsDAG` lineage computation into `actionsDAGUtils`
- Record TopK-filtered granules in the query condition cache
- Support aggregate functions in the trivial GROUP BY LIMIT optimization
- Adaptive lazy execution of short-circuit function arguments (continues #73776)
- Propagate NDV through functions with constant arguments
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- C++ not yet supported