Bruce Momjian wrote: > Joey Adams wrote: > > Forwarding because the mailing list rejected the original message. > > Yes, I am seeing email failures to the 'core' email list.
Marc says it is now fixed. --------------------------------------------------------------------------- > > > > > ---------- Forwarded message ---------- > > From: Joey Adams <[email protected]> > > Date: Tue, Jul 19, 2011 at 11:23 PM > > Subject: Re: Initial Review: JSON contrib modul was: Re: [HACKERS] > > Another swing at JSON > > To: Alvaro Herrera <[email protected]> > > Cc: Florian Pflug <[email protected]>, Tom Lane <[email protected]>, Robert > > Haas <[email protected]>, Bernd Helmle <[email protected]>, > > Dimitri Fontaine <[email protected]>, David Fetter > > <[email protected]>, Josh Berkus <[email protected]>, Pg Hackers > > <[email protected]> > > > > > > On Tue, Jul 19, 2011 at 10:01 PM, Alvaro Herrera > > <[email protected]> wrote: > > > Would it work to have a separate entry point into mbutils.c that lets > > > you cache the conversion proc caller-side? > > > > That sounds like a really good idea. ?There's still the overhead of > > calling the proc, but I imagine it's a lot less than looking it up. > > > > > I think the main problem is > > > determining the byte length of each source character beforehand. > > > > I'm not sure what you mean. ?The idea is to convert the \uXXXX escape > > to UTF-8 with unicode_to_utf8 (the length of the resulting UTF-8 > > sequence is easy to compute), call the conversion proc to get the > > null-terminated database-encoded character, then append the result to > > whatever StringInfo the string is going into. > > > > The only question mark is how big the destination buffer will need to > > be. ?The maximum number of bytes per char in any supported encoding is > > 4, but is it possible for one Unicode character to turn into multiple > > "character"s in the database encoding? > > > > While we're at it, should we provide the same capability to the SQL > > parser? ?Namely, the ability to use \uXXXX escapes above U+007F when > > the server encoding is not UTF-8? > > > > - Joey > > > > -- > > Sent via pgsql-hackers mailing list ([email protected]) > > To make changes to your subscription: > > http://www.postgresql.org/mailpref/pgsql-hackers > > -- > Bruce Momjian <[email protected]> http://momjian.us > EnterpriseDB http://enterprisedb.com > > + It's impossible for everything to be true. + > > -- > Sent via pgsql-hackers mailing list ([email protected]) > To make changes to your subscription: > http://www.postgresql.org/mailpref/pgsql-hackers -- Bruce Momjian <[email protected]> http://momjian.us EnterpriseDB http://enterprisedb.com + It's impossible for everything to be true. + -- Sent via pgsql-hackers mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
