SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Function plus (alias dummy) (children 1)
     ExpressionList (children 2)
      Identifier dummy
      Literal UInt64_3
   ExpressionList (children 1)
    Function plus (alias y) (children 1)
     ExpressionList (children 2)
      Identifier dummy
      Literal UInt64_1
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.one
   Set
