Hi! Looks good to me, but I have several comments.
Your patch improves tests, but why did you change formatting in jsonpath_exec.c? What's the motivation?
[1] select jsonb_path_query('[1,2,3,{"b": [3,4,5]}]', 'strict $.*');
I propose adding a similar test with explicitly specified lax mode: select jsonb_path_query('[1,2,3,{"b": [3,4,5]}]', 'lax $.*'); to show what lax mode is set by default.
Odd empty result for the test: select jsonb '[1,2,3,{"b": [3,4,5]}]' @? 'strict $.*';
I expected an error like in test [1]. This behavior is not obvious to me.
Everything else is cool. Thanks to the patch and the discussion above, I began to understand better how wildcards in JSON work.
Best regards, Stepan Neretin.
