SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function hex (children 1)
     ExpressionList (children 1)
      Function keccak256 (children 1)
       ExpressionList (children 1)
        Function repeat (children 1)
         ExpressionList (children 2)
          Literal \'a\'
          Literal UInt64_1000
