clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Backport #128525 to 26.9: Fix Iceberg `ADD COLUMN` reusing a nested field id when `last-column-id` is too small
- Backport #128525 to 26.10: Fix Iceberg `ADD COLUMN` reusing a nested field id when `last-column-id` is too small
- Check the `TABLE ENGINE` grant before `ATTACH ... AS [NOT] REPLICATED` converts a table
- Hide secrets of the inner query of `COPY (query) TO STDOUT` in logs
- hasAllTokens is up to 3x slower than the equivalent hasToken chain on the row-scan path; searching each needle like hasToken cuts it 21-68%
- Fix UNKNOWN_IDENTIFIER after exception in dropped if/multiIf branch
- Fix text index misreading vectorscan-only regex syntax in multiMatchAny
- Fix shard pruning and read-in-order when = '' is rewritten to empty()
- Fix inverse dictionary lookup signed zero mismatch on LowCardinality(Float)
- Fix crash when writing constant Tuple column to MergeTree projection
- Docs
- C++ not yet supported