SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 3)
    Identifier x1
    Identifier x2
    Identifier x3
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier x3
   Literal UInt64_1
   ExpressionList (children 1)
    Identifier x3