clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- TopN Parquet read caches a reduced row count; later `count()` is wrong
- Subcolumn of Hive partition column read from file instead of path
- Apply `session_timezone` to string literals inside functions in mutations
- Failed REPLACE PARTITION leaves old and new rows both active in MergeTree
- `bloom_filter` index on float column skips granules holding `-0.0` vs `0.0`
- NULL in a `Variant` column wrongly fails `IN set` under transform_null_in
- Positional WITH FILL key checked against INTERPOLATE under wrong column name
- Non-fill `ORDER BY` key as `INTERPOLATE` output runs by position or remote
- FileLog loses rows when a renamed-in file reuses a deleted file's inode
- Fix(Parsers): Accept COPY options without WITH
- Docs
- C++ not yet supported