clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix TTLDrop merge of a table with a text index or an inert index
- Fix data loss and silent behaviour changes in databases with lazy_load_tables
- Statistics-based part pruning drops NaN rows: NOT (f < c) prunes a part whose only matching rows are NaN — silent empty result at default settings
- rewrite_in_to_join breaks repeated identical aliased IN expressions: MULTIPLE_EXPRESSIONS_FOR_ALIAS on a query that is valid without the rewrite
- Top-K dynamic filtering over a Tuple() column: ORDER BY ALL DESC LIMIT n throws NOT_IMPLEMENTED "Comparison of zero-sized tuples" at default settings
- Fix "Coordinator for parallel reading from replicas is not initialized" for a nested cluster read
- Crash between the mutation entry and the metadata commit of `ALTER ... RENAME COLUMN` silently returns defaults for acknowledged data on wide parts
- Refuse to read Apache Paimon primary-key tables instead of returning superseded rows
- Fix materialized CTE gate missing for a reused CTE over Distributed
- Paimon table functions: the `structure` argument is reported by DESC but ignored by SELECT
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