clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Throw a clear error when a marks file listed in checksums is missing on disk
- Refresh TO-target materialized view columns when upstream tables are altered
- Support group_by_use_nulls in WITH TOTALS
- Fix minmax skip index and partition pruning skipping NaN under negated float ranges
- Fix wrong result for duplicate-named subquery columns wrapped in SELECT *
- [Experiment] Reduce size of hashtable by demoting some of keys from hash to post filter step
- Inserts to MVs are dropped - Happens on chained Mvs down the chain.
- `DESCRIBE` and `SHOW CREATE TABLE` report stale column types for TO-target materialized views after upstream `ALTER MODIFY COLUMN`
- Add `type_json_skip_null_typed_paths` setting to treat NULL typed JSON paths as absent
- Fix signed integer overflow in condition_variable::wait_for with huge timeouts
- Docs
- C++ not yet supported