SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Literal UInt64_1 (alias a)
    Literal UInt64_2 (alias b)
   ExpressionList (children 2)
    OrderByElement (children 1)
     Identifier a
    OrderByElement (children 3)
     Identifier b
     Literal UInt64_10
     Literal UInt64_3
