SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Function positionCaseInsensitive (children 1)
       ExpressionList (children 2)
        Function materialize (alias h) (children 1)
         ExpressionList (children 1)
          Literal \'abc\'
        Literal \'\' (alias n)
      Function positionCaseInsensitive (children 1)
       ExpressionList (children 2)
        Identifier h
        Identifier n
