Postgres JSON函数传递字符串而不是对象

Question

So I've got a Postgres function in place designed to merge two JSONB objects recursively, and it works just fine on the production server but fails on my local Postgres installation. The function itself is written in plv8 (a v8 Javascript engine basically) and expects two arguments in JSONB format to merge; the problem is that the JSON is passed in as a string and not as an object, which essentially breaks the entire function.

This only happens on my local computer though, a fresh Postgres 9.4.5 installation. The production server is running 9.4.4, which shouldn't cause such a major change across versions...ideas on where to go to see what's broken here?

EDIT: Can now confirm that reverting to 9.4.4 doesn't make this behave any differently locally

Answer 1

Hard to say. Possibilities:

1. Different casts - you can define custom casts - CREATE CAST statement - try to check result of psql command \\dC *json*

2. New bug introduced in 9.4.5

Answer 2

FWIW，升级到9.5对我来说似乎可以解决此问题。