On Jan 21, 2024, at 14:58, David E. Wheeler <da...@justatheory.com> wrote:
> I make this interpretation based on this bit of the docs: Sorry, that’s from my branch. Here it is in master: <listitem> <para> A path expression can be a Boolean predicate, although the SQL/JSON standard allows predicates only in filters. This is necessary for implementation of the <literal>@@</literal> operator. For example, the following <type>jsonpath</type> expression is valid in <productname>PostgreSQL</productname>: <programlisting> $.track.segments[*].HR < 70 </programlisting> </para> </listitem> In any event, something to do with @@, perhaps to have some compatibility with `jsonb @> jsonb`? I don’t know why @@ was important to have. David