Optimization of GROUP BY Clause for LowCardinality Data Types

Why it matters

This feature improves the performance and efficiency of queries using the GROUP BY clause on columns with LowCardinality data types by optimizing how these values are processed internally, reducing query execution time and resource consumption.

How to use it

Users benefit from this optimization automatically when running queries with the GROUP BY clause on LowCardinality columns. No explicit configuration or syntax changes are required.