SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Function xxHash64 (children 1)
       ExpressionList (children 1)
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'foo\'
          Literal \'FixedString(3)\'
      Function xxHash64 (children 1)
       ExpressionList (children 1)
        Literal \'foo\'
