I wrote:
> Robert Haas <robertmh...@gmail.com> writes:
>> If you try to put all that on the same line, I think it might get
>> awkwardly long.  Perhaps something like:

>> Function Scan on function_name
>> Expression: function_name(function_arg1, function_arg2, ...)

> Yeah, that's what I had in mind, but I'm still fumbling for the right
> label.  "Expression" seems a bit too generic.

How about "Function Call"?

A moment's hacking later:

regression=# explain verbose SELECT lv|| op|| rv FROM unnest(ARRAY[
        ROW('1.2.2'::semver,  '='::text, '1.2.2'::semver),
        ROW('1.2.23', '=', '1.2.23')
    ]) AS f(lv semver, op text, rv semver);
                                                           QUERY PLAN           
                                                
--------------------------------------------------------------------------------------------------------------------------------
 Function Scan on pg_catalog.unnest f  (cost=0.00..1.50 rows=100 width=96)
   Output: (((lv)::text || op) || (rv)::text)
   Function Call: unnest(ARRAY[ROW(('1.2.2'::text)::semver, '='::text, 
('1.2.2'::text)::semver), ROW('1.2.23', '=', '1.2.23')])
(3 rows)

Look reasonable?

                        regards, tom lane

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