optimize_group_* session settings - ClickHouse Documentation

These settings are available in system.settings and are autogenerated from source.

optimize_group_by_constant_keys

Optimize GROUP BY when all keys in block are constant

optimize_group_by_function_keys

Eliminates functions of other keys in GROUP BY sectio

Last modified on July 23, 2026

optimize_if_*ClickHouse session settings in the optimize_if_* generated group.