How to use JSONB_SET for updating JSONB Column in PostgreSQL Procedure - postgresql

Question

I am using a Stored Procedure to update a JSONB column in the table and it does not seem to work. Any help would be much appreciated. Many Thanks.
My Table is:
CREATE TABLE mn_customer (
cust_id int,
f_name varchar(20),
l_name varchar(20),
json_payload jsonb);
My SPROC is:
create or replace procedure update_mn_customer
(
update_cust_id int DEFAULT null,
update_json_payload jsonb DEFAULT null
)
language plpgsql as
$proc$
begin
update mn_customer
set json_payload = jsonb_set(json_payload, update_json_payload)
where cust_id = update_cust_id;
commit;
end
$proc$;
My call to procedure to perform an Update is:
call update_mn_customer(
1998, to_jsonb('{"jsonpayload-fld1": "John Davis", "jsonpayload-fld2": "Lenny Pascoe","jsonpayload-fld3": "Undefined"}'::text)
);
I keep getting the Error:
ERROR: function jsonb_set(jsonb, jsonb) does not exist
LINE 2: set json_payload = jsonb_set(json_payload, update_js...
^
HINT: No function matches the given name and argument types. You might need to add explicit type casts.
QUERY: update mn_customer
set json_payload = jsonb_set(json_payload, update_json_payload)
where cust_id = update_cust_id
CONTEXT: PL/pgSQL function update_mn_customer(integer,jsonb) line 8 at SQL statement

Answer 1

You use jsonb_set when you want to replace only one part of the jsonb data identified by a path with a new jsonb value. In your case, it seems that update_json_payload is the new value for the json_payload column so you just have to update it :
update mn_customer
set json_payload = update_json_payload
where cust_id = update_cust_id ;
Then you don't need to commit inside the plpgsql procedure.