clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- More dictionary source types
- groupArrayLast merge behaviour
- clickhouse-client & server should emphasize invisible characters in the error message
- Parallel replicas + cluster not working as expected
- Support the Multiple-Unequal-Join Key
- empty result or ZLIB_INFLATE_FAILED error when using S3 table function and GCS files with Content-Encoding: gzip after upgrading from 22.12 to 23.x
- Function `JSONSchema`
- UInt256 convert to UInt64 internal in complex_key_cache dictionary layout and long key values doesn't work
- Optimisation: rewrite equivalent inner join to IN + subquery if conditions do not depend on both tables
- leb128 as a Codec
- Docs
- C++ not yet supported