How can I update a jsonb column while leaving existing fields intact in postgresql - postgresql

Question

How can I refactor this update statement so that it updates a jsonb column in my postgresql table?
update contacts as c set latitude = v.latitude,longitude = v.longitude,
home_house_num = v.home_house_num,home_predirection = v.home_predirection,
home_street_name = v.home_street_name, home_street_type = v.home_street_type
from (values (16247746,40.814140,-74.259250,'25',null,'Moran','Rd'),
(16247747,20.900840,-156.373700,'581','South','Pili Loko','St'))
as v(contact_id,latitude,longitude,home_house_num,home_predirection,home_street_name,home_street_type) where c.contact_id = v.contact_id
My table looks like this ...
|contact_id (bigInt) |data (jsonb)|
-----------------------------------
|111231 |{"email": "albsmith#gmail.com", "home_zip": "07052", "lastname": "Smith",
"firstname": "Al", "home_phone": "1111111111", "middlename": "B",
"home_address1": "25 Moran Rd", "home_street_name": "Moran Rd"}
Note that I do not want to overwrite any other fields that may already exist in the jsonb object that are not specified in the update statement. For example, in this example, I would not want to overwrite the email or name fields

Answer 1

You could restructure your update into something like:
update
contacts c
set
data = c.data || v.data
FROM
(values
(
16247746,
'{
"latitude": 40.814140,
"longitude": -74.259250,
"home_house_num": "25",
"home_predirection": null,
"home_street_name": "Moran",
"home_street_type": "Rd"
}'::JSONB
),
(
16247747,
'{
"latitude": 20.900840,
"longitude": -156.373700,
"home_house_num": "581",
"home_predirection": "Sourth",
"home_street_name": "Pili Loko",
"home_street_type": "St"
}'::JSONB
)
) as v(
contact_id,
data
)
where
c.contact_id = v.contact_id
;