On Fri, 2012-05-04 at 16:12 -0400, Tom Lane wrote: > Robert Haas <robertmh...@gmail.com> writes: > > On Fri, May 4, 2012 at 3:49 PM, Hannu Krosing <ha...@krosing.net> wrote: > >> Can we at least have the xxx_to_json() functions try cast to json first > >> and fall back to text if the cast fails. > > > I think the idea that you can involve the casting machinery in this is > > misguided.
> It is possible that that can be made to work, but it's a research > project, not something to be crammed into 9.2 at the last possible > minute. In any case, I really dislike the idea that array_to_json > and row_to_json would contain two entirely different behaviors. > Leave the extensibility ideas for a future to_json() function. I did not mean that array_to_json and row_to_json would be different than the generic to_json, just that they would be thin wrappers around the to_json function which check that the arguments are of the correct types for casting to "JSON text". They need to recurse to each other and generic to_json anyway. > regards, tom lane -- ------- Hannu Krosing PostgreSQL Unlimited Scalability and Performance Consultant 2ndQuadrant Nordic PG Admin Book: http://www.2ndQuadrant.com/books/ -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers