Check if key exists in a JSON with PL/pgSQL?

Question

I\'m trying to check if a key exists in a JSON sent as parameter in a PL/pgSQL function.

Here is the function.

CREATE FUNCTION sp_update_user(user_in         


        

Answer 1

Another way to check if a JSON key exists is with json_extract_path(). Here's an example use:

SELECT permit_id FROM building_permits WHERE
json_extract_path(containing_boundaries, 'neighborhood') IS NULL

This looks for a property in your JSON object ("containing_boundaries") called "neighborhood". If the property does not exist, it returns NULL.