clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Speed up minmax index evaluation
- Fix KQL parser depth and backtracks counter propagation
- Fix flaky 00825_protobuf_format_map under map-bucket serialization
- Fix KQL parser depth and backtracks counter propagation
- `checkLimits` uses conservative `total_size` for `system.numbers` causing false `TOO_MANY_ROWS` with LIMIT
- Improve best effort timestamp parse - micro and nanoseconds
- `original_console_log_level_config` reads from `logger.startup_console_log_level` instead of `logger.console_log_level`, so the console log level is never restored after startup
- `tryMakeDirectJoinWithMergeTree` accepts `ReadFromPreparedSource` which lacks `clone`, causing `NOT_IMPLEMENTED` exception for Buffer tables
- `NOT_FOUND_COLUMN_IN_BLOCK` when combining `WITH FILL INTERPOLATE` and `LIMIT N BY` (analyzer=1)
- `DETACH TABLE` (without `TEMPORARY` keyword) silently succeeds on temporary tables due to narrowed guard in `executeToTableImpl`
- Docs
- C++ not yet supported