如何更新 Postgres JSON 字段中对象数组中存在的对象的特定值的多次出现

Question

这是我的 JSON 字段，其中有多个同名用户。我想将名称为 Devang 的所有用户更新为 Dev

JSON

{
    "user": [
        {
            "user_name": "Devang",
            "user_weight": 0.7676846955248864
        },
        {
            "user_name": "Meet",
            "user_weight": 0.07447325861051013
        },
        {
            "user_name": "Devang",
            "user_weight": 0.056163873153859706
        }
    ],
    "address": [
        {
            "address_name": "India"
        }
    ]
}

更新后 JSON 将是

{
    "user": [
        {
            "user_name": "Dev",
            "user_weight": 0.7676846955248864
        },
        {
            "user_name": "Meet",
            "user_weight": 0.07447325861051013
        },
        {
            "user_name": "Dev",
            "user_weight": 0.056163873153859706
        }
    ],
    "address": [
        {
            "address_name": "India"
        }
    ]
}

我在这里尝试过这个查询，但是由于子查询只更新了第一次出现的地方。

with cte as (
  select  id,  ('{user,'||index-1||',user_name}')::text[] as json_path
  from user_table, jsonb_array_elements(json_field->'user') 
  with ordinality arr(vals,index) where arr.vals->>'user_name' ='Devang'
  )

 update user_table 
set json_field = jsonb_set(json_field,cte.json_path,'"Dev"',false) 
 from cte where user_table.id=cte.id;

请也看看这个DEMO

任何答案将不胜感激

Answer 1

您可以使用字符串函数 REPLACE:

UPDATE user_table
SET json_field = REPLACE(json_field :: TEXT, '"user_name": "Devang"', '"user_name": "Dev"') :: JSONB;

https://dbfiddle.uk/?rdbms=postgres_10&fiddle=fa36275977f85a1233bcbec150ada266

如何更新 Postgres JSON 字段中对象数组中存在的对象的特定值的多次出现

How to update multiple occurrence a specific value of a object present in array of object within Postgres JSON Field

sql

postgresql

json

jsonb