clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Clickhouse V.26.3.9.8 Can't Create Table Egine while V.26.5 Can
- `DESCRIBE` and `SHOW CREATE TABLE` report stale column types for TO-target materialized views after upstream `ALTER MODIFY COLUMN`
- Spurious TOTALS row in non-aggregate SELECT when WHERE contains a correlated scalar subquery using `WITH TOTALS HAVING <expr over outer column>`
- `NOT hasToken(<Nullable>, ...)` over text-index direct-read returns rows whose value is NULL
- Non-matched RIGHT JOIN row carries the outer SELECT's constant column (not defaulted) when the join is wrapped in a subquery
- `mapKeys` bloom_filter index prunes everything for `map[k] = toFixedString('\', N)` (String form works, FixedString does not)
- Backport #92925 to 25.8: segfault rebuilding _part_offset projection during CoalescingMergeTree merge
- Drafting DataLake decoupling
- Converting from MergeTree to ReplicatedMergeTree
- minmax skip index prunes NaN granule under negated float range predicate (`NOT ((val >= a) AND (val <= b))`)
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