clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Cover parameterised view parameters forwarded to a shard
- Umbrella: end-to-end / dry-run tests for CI release workflows
- Coalesce small GraceHashJoin spill blocks during recovery
- Keeper: add an option to stream remote snapshots without caching the full file
- Zero-length metadata_version.txt after power loss detaches the whole part and silently loses acknowledged rows (missing file is safe, empty file is fatal)
- Zero-length columns.txt after power loss detaches the whole Wide part and silently loses acknowledged rows (missing file is safe, empty file is fatal)
- Allow optimize_functions_to_subcolumns under FINAL for row-selecting merge engines
- Iceberg: identity `timestamp` partition values stored as plain Avro `long` (pre-#109764 writers) make the table unreadable (`DECIMAL_OVERFLOW`) or silently corrupt values and filter results since #116129
- Fill named tuples from JSON objects only in the `JSONExtract` functions
- Text index: bypass non-selective LIKE patterns before reading postings
- Docs
- C++ not yet supported