On Wed, May 30, 2018 at 12:42 AM, Charles Cui <charles.cui1...@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
