SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function getSizeOfEnumType (children 1)
     ExpressionList (children 1)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'b\'
        Literal \'Enum16(\\\'a\\\' = 1, \\\'b\\\' = 2, \\\'x\\\' = 10)\'
