clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- S3Queue: in Ordered mode a retriable failure loses a file when a later file of its ordering domain was committed meanwhile
- WASM UDF: `LowCardinality` arguments never reach the `ColumnBinary` wire, and a `LowCardinality` argument declaration cannot be called
- Materialized CTEs lose single-evaluation semantics in stored view definitions and lightweight UPDATE
- CTE inside an ALTER TABLE ... DELETE/UPDATE subquery fails with UNKNOWN_TABLE: the CTE name is qualified with the database
- Propagate the OpenTelemetry trace context to stateless workers and add a span per distributed plan task
- Highlight JSON syntax in Pretty and Vertical output formats
- ObjectStorageQueue: parallel_inserts is declared in the table metadata and never written, so the setting has no effect
- Fix `BAD_ARGUMENTS` for `S3` arguments combining `headers(...)` with a key-value argument
- Float32 expanded-distance score misassigns vectors with a large common offset
- New arrayJoin gate misses lambda-wrapped rand: draw still replicated per source row
- Docs
- C++ not yet supported