如何更新 PostgreSQL 数据库中 JSONB 数组中的“键”

Question

I want to update the JSONB array in PostgreSQL DB but most of the solutions I'm getting are for updating values adn NOT keys. My target is to change the key "SpindSpeed_Med" to "SpindleSpeed" and "RapidOveride_Med" to "RapidOverride".

Query to make sample database:

CREATE TABLE test (
    uid int,
    tooldata jsonb
);

INSERT INTO test (uid, tooldata) 
VALUES (1, '[
  {
    "Ftn": 1,
    "SpindSpeed_Med": 1234,
    "RapidOveride_Med": 100
  },
  {
    "Ftn": 2,
    "SpindSpeed_Med": 1234,
    "RapidOveride_Med": 100
  },
  {
    "Ftn": 3,
    "SpindSpeed_Med": 1234,
    "RapidOveride_Med": 100
  }]'),
(2, '[
  {
    "Ftn": 1,
    "SpindSpeed_Med": 1234,
    "RapidOveride_Med": 100
  },
  {
    "Ftn": 2,
    "SpindSpeed_Med": 1234,
    "RapidOveride_Med": 100
  },
  {
    "Ftn": 3,
    "SpindSpeed_Med": 1234,
    "RapidOveride_Med": 100
  }
]');

^ Updated for multiple rows and added uid

Expected result:

[{"Ftn": 1, "SpindleSpeed": 1234, "RapidOverride": 100}, 
{"Ftn": 2, "SpindleSpeed": 1234, "RapidOverride": 100},
{"Ftn": 3, "SpindleSpeed": 1234, "RapidOverride": 100}] 

I have tried using "jsonb_set" but that only changes the value part not the key. Also, I used a combination of "jsonb_object_keys" and "jsonb_array_elements" but that gave just keys as result and I could not put it back into the array. Thanks in advance!

Answer 1

select jsonb_agg (q2) from (
  select json_agg(
    j::jsonb - 'SpindSpeed_Med' ||
    jsonb_build_object('SpindleSpeed', j->'SpindSpeed_Med')
  )
from (
    select jsonb_array_elements(tooldata) as j from jsontest
) as q) as q2 ;

First, split jsonb array to rows, remove 'SpindSpeed_Med', add 'SpindleSpeed' for each row and finally combine back to jsonb.