clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Flaky test: test_distributed_frozen_replica/test.py::test_cluster_all_replicas_query[3-test_cluster]
- Add test: `system.dns_cache` row data (`cached_at`, `ip_family`) never verified by any test
- Add test: `updateMutations` early-abort under `SYSTEM STOP PULLING REPLICATION LOG` is untested
- Make client rainbow parentheses optional
- `SerializationEnum::serializeTextQuoted` ignores `output_format_values_escape_quote_with_quote`, causing `INSERT INTO sqlite_table` to fail with SQLite syntax error for `Enum` values whose name contains a single quote
- Backport #103773 to 25.8: Fix UB while parsing dateTime
- Fix toString(DateTime, tz) throwing when tz is Nullable(String) with …
- Fix server crash in `getTablesSplitByDependencyLevel` with cyclic dependencies
- When a table has no ORDER BY key, we should use `optimize_row_order` by default
- Add max_bytes_ratio_before_external_join setting
- Docs
- C++ not yet supported