clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Top-K dynamic filtering over a Tuple() column: ORDER BY ALL DESC LIMIT n throws NOT_IMPLEMENTED "Comparison of zero-sized tuples" at default settings
- Fix "Coordinator for parallel reading from replicas is not initialized" for a nested cluster read
- Crash between the mutation entry and the metadata commit of `ALTER ... RENAME COLUMN` silently returns defaults for acknowledged data on wide parts
- Refuse to read Apache Paimon primary-key tables instead of returning superseded rows
- Fix materialized CTE gate missing for a reused CTE over Distributed
- Paimon table functions: the `structure` argument is reported by DESC but ignored by SELECT
- ENGINE = Backup storage policy key ignores the resolved destination, so ALTER NAMED COLLECTION between DROP and recreate silently reads the old backup
- Paimon primary-key tables silently return duplicate/stale rows: no merge-on-read, primary keys ignored
- Fix `JSONAllValues` text index probe coercion
- Fix division by zero in `ReadFromMergeTree` when `StorageMerge` truncates the number of streams
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- C++ not yet supported