clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- `COPY TO STDOUT WITH HEADER` sends no header line for an empty result
- COPY ... STDIN/STDOUT (options) fails when `WITH` keyword is omitted
- COPY over PostgreSQL protocol rejects PostgreSQL's own `\N` and `E'\t'` syntax
- COPY (query) TO STDOUT fails with syntax error on generated SELECT
- Feature request: publish an official ARMv8.0-baseline (aarch64v80compat) Docker image
- ALIAS column returns raw source value in distributed join with window function
- An `IN <table>` or `IN (SELECT ...)` in a TTL `GROUP BY ... SET` assignment is accepted at CREATE but permanently fails every merge with a `Not-ready Set` exception
- Parallel replicas INSERT SELECT into an S3 table: every replica uploads its share to the same key, silent loss of most rows
- Re-adding a skip index under a dropped index's name silently returns wrong results while the DROP INDEX mutation is pending
- CLEAR COLUMN is silently skipped when combined with RENAME COLUMN of the same column in one ALTER statement
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- C++ not yet supported