SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Function xxHash32 (children 1)
       ExpressionList (children 1)
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'foo\'
          Literal \'FixedString(3)\'
      Function xxHash32 (children 1)
       ExpressionList (children 1)
        Literal \'foo\'