SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 2)
           Function toUInt64 (children 1)
            ExpressionList (children 1)
             Identifier b
           Function sum (alias b) (children 1)
            ExpressionList (children 1)
             Identifier id
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier test
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier toUInt64(sum(id))
     Literal UInt64_3
