clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Cherry pick #117329 to 26.3: Add a setting to forbid listing namespaces in catalogs
- Cherry pick #117329 to 26.7: Add a setting to forbid listing namespaces in catalogs
- Prepare changelog for 26.10
- Schema inference: an integer past the inference sample is silently wrapped into the sampled type — ClickHouse cannot read back its own CSV export of a UInt64 column
- JSON type: a `null` array element is silently replaced by an empty array on a dynamic path — and whether it survives depends on the order the rows arrive in
- serializeSortDescription writes `alias` only for WITH FILL columns
- optimize_redundant_functions_in_order_by drops an ORDER BY term under WITH CUBE / ROLLUP / GROUPING SETS, returning wrong row order — and wrong rows under LIMIT
- Empty namespace tuple from a REST catalog throws LOGICAL_ERROR in `parseNamespaces`
- Fix performance regression in short-circuit logical mask evaluation
- Dangling tuple element type when the KV tuple key filter holds LowCardinality
- Docs
- C++ not yet supported