v.21.3Performance Improvement
Parallelize SELECT with FINAL for single part when setting is 1
Parallelize SELECT with FINAL for single part with level > 0 when do_not_merge_across_partitions_select_final setting is 1. #19375 (Kruglov Pavel).Parallelize SELECT with FINAL for single part with level > 0 when do_not_merge_across_partitions_select_final setting is 1. #19375 (Kruglov Pavel).