clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix column TTL reset of defaults that read `ALIAS` or `EPHEMERAL` columns or lambda parameters
- Check the query of `CREATE HANDLER` against its creator and support `DEFINER` / `SQL SECURITY` for handlers
- Fix `INSERT SELECT` from table functions when a `DEFAULT` reads a column the `INSERT` does not write
- Plan-based parallel replicas: do not ship a read of a temporary table
- Read Paimon primary-key tables where Paimon itself reads them without merging
- Surface version metadata ("introduced in", "deprecated in") on documentation pages
- Add `JSONExtractLeafValues` and `JSONExtractLeafPathsAndValues` to read all leaf values of a JSON `String`
- Add `JSONExtractLeafValues` and `JSONExtractLeafPathsAndValues` functions
- Text-index LIKE with shared literal prefix 8-43x slower than 26.10
- Fix stale text index and uncompressed cache results after a part directory is reused
- Docs
- C++ not yet supported