On Thursday, October 11, 2018, Bruce Momjian &lt;<a href="mailto:bruce@momjian.us">bruce@momjian.us</a>&gt; wrote:<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
        The result is NULL if no comparison with a subquery row returns<br>
        false, and it returns NULL for at least one row.<br>
<br>
I can make similar adjustments in other places, and have attached a doc<br>
patch.  Does that help?<br>
</blockquote><div><br></div><div>+1</div><div><br></div><div>David J. </div>