clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Add a line about 26.10 for `elasticsearch` experimental setting
- Do not read in order across exchanges kept by `distributed_plan_optimize_exchanges = 0`
- `CREATE TABLE` fails with `CANNOT_UNLINK` on the cleanup of a `.sql.detached` flag that does not exist, after the table was already created
- `DirectJoinMergeTreeEntity` keeps nested `Sparse`: `direct` join returns garbage
- Support Tuple columns in hash join row store
- Startup dependency probe still throws on unreachable `Filesystem` DB path
- Insert is not working on SimpleAggregateFunction fields.
- Incremental RMV limit rows/bytes per stream round
- Use SVE2 `MATCH` in `find_first_symbols` on AArch64
- Respect start_pos in countSubstrings
- Docs
- C++ not yet supported