SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function finalizeAggregation (children 1)
     ExpressionList (children 1)
      Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Function initializeAggregation (children 1)
            ExpressionList (children 4)
             Literal \'sumMapState\'
             Literal Array_[UInt64_1, UInt64_2]
             Literal Array_[UInt64_1, UInt64_2]
             Literal Array_[UInt64_1, NULL]