SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function multiSearchFirstIndex (children 1)
     ExpressionList (children 2)
      Function materialize (children 1)
       ExpressionList (children 1)
        Literal \'Hello World\'
      Function materialize (children 1)
       ExpressionList (children 1)
        Function array (children 1)
         ExpressionList
