clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Read MATERIALIZED CTEs in parallel
- SIGSEGV on argument-less function via SQL UDF body or EXPLAIN AST
- Merge single-token `NOT hasAll` / `NOT has` predicates on the same column into one `NOT hasAny`
- Fix estimateCompressionRatioIf ignoring its condition without GROUP BY keys and in window functions
- Add the experimental `MaxMindDB` table engine
- Fix filename collision in concurrent INSERT INTO FUNCTION file with engine_file_allow_create_multiple_files
- Compact codec proof reads only the first frame: `NONE`-default part refused
- timeout_overflow_mode='break' over HTTP yields zero stats / empty Parquet body
- Server fails to start with `<comment>` in dictionary/UDF config.d files
- Progress bar not cleared before rows when stderr shares stdout (`2>&1`)
- Docs
- C++ not yet supported