v.20.1Bug Fix
Fix Background Merge Error in SimpleAggregateFunction(LowCardinality)
Fix error in background merge of columns with SimpleAggregateFunction(LowCardinality) type. #8613 (Nikolai Kochetov)Fix error in background merge of columns with SimpleAggregateFunction(LowCardinality) type. #8613 (Nikolai Kochetov)