clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Stale set skip index read after ALTER MODIFY COLUMN whose mutation was killed aborts index analysis
- Do not re-check dependencies after the table was shut down
- OneLake (ADLS Gen2): a failed INSERT overwriting an existing object deletes the previously committed object
- Do not let an orphaned test process wedge the functional-test pipeline
- A failed BACKUP finalize deletes a backup that already completed, making any incremental chained onto it unrestorable
- Flaky test: 03443_projection_sparse
- `AggregatingStep` and `MergingAggregatedStep` don't serialize `serialize_string_in_memory_with_zero_byte` into the query plan
- generateManifestOnlySnapshot still seeds refs with a raw Poco::JSON::Object pointer (same bug the PR fixes in generateNextMetadata)
- EXPLAIN ANALYZE does not report skip index pruning with use_skip_indexes_on_data_read = 1
- Proper sync drop iceberg
- Docs
- C++ not yet supported