SQL row_to_json and wildcard select

[aljazerzen]

This should work:

select row_to_json(*) from (select 1 as a, 'b' as b) t;

... but it does not because we compile it to something like this:

select row_to_json(t.a) from (...) t

This is wrong because it discards all but the first column (not even raising an error!)