clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Look the columns cache up once per mark range, not once per PREWHERE gap
- Keep database replication running after refused drops and detaches
- `--multiline` with highlighting: Enter won't run a query ending in whitespace
- Add studentTCDF function
- `SHOW CREATE TABLE` and `system.query_log` print `nats_url`, `rabbitmq_address` and `after_processing_move_connection_string` unescaped, which is invalid SQL for a value with a quote or a backslash
- Add: `fromExpHistogram`/`toExpHistogram` + related changes
- Escape the values of `nats_url`, `rabbitmq_address` and `after_processing_move_connection_string` in `SHOW CREATE TABLE` and `system.query_log`
- Check the `RECOMPRESS` codec in `CREATE TABLE ... TTL` against the settings of the query and the session
- Fix `max_rows_to_read` with projection indexes and partial projections
- Skip repeated values of a LowCardinality argument in uniq, uniqExact, uniqHLL12, uniqTheta, min, max and groupUniqArray without GROUP BY
- Docs
- C++ not yet supported