[GSoC] json helper functions
Hi mentors and hackers,
I am working on providing a new plugin where creates new data type
(thrift). What I am currently planning is to translate cstring to byte for
thrift_in functions. The cstring should be json format. When I looking at
json helper functions I find the header
./include/server/utils/json.h
where all functions have the signature of Datum
function(PG_FUNCTION_ARGS).This signature causes extra overhead when
writing the code because I need to convert my intermediate variables to the
required format. Wondering are there any json helpers that are used by
postgresql and plugins can directly call?
Thanks Charles
On Wed, May 30, 2018 at 12:42 AM, Charles Cui <charles.cui1984@gmail.com> wrote:
Hi mentors and hackers,
I am working on providing a new plugin where creates new data type
(thrift). What I am currently planning is to translate cstring to byte for
thrift_in functions. The cstring should be json format. When I looking at
json helper functions I find the header./include/server/utils/json.h
where all functions have the signature of Datum
function(PG_FUNCTION_ARGS).This signature causes extra overhead when writing
the code because I need to convert my intermediate variables to the required
format. Wondering are there any json helpers that are used by postgresql and
plugins can directly call?
See the DirectFunctionCall macros. There are lots of examples in the code.
cheers
andrew
--
Andrew Dunstan https://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services