select sum(number+1)+2 as sumx from system.numbers_mt(100000)
AggregatorFinal: groupBy=[[]], aggr=[[(sum([(number + 1)]) + 2) as sumx]]\
\n RedistributeStage[state: AggregatorMerge, id: 0]\
\n AggregatorPartial: groupBy=[[]], aggr=[[(sum([(number + 1)]) + 2) as sumx]]\
\n ReadDataSource: scan parts [8](Read from system.numbers_mt table, Read Rows:100000, Read Bytes:800000)
AggregatorFinalTransform ร 1 processor\
\n Merge (RemoteTransform ร 3 processors) to (AggregatorFinalTransform ร 1)\
\n RemoteTransform ร 3 processors
AggregatorFinalTransform ร 1 processor\
\n Merge (RemoteTransform ร 3 processors) to (AggregatorFinalTransform ร 1)\
\n RemoteTransform ร 3 processor(s): AggregatorPartialTransform ร 8 processors -> SourceTransform ร 8 processors