[英]Modify datatype of a field in JSONB in Postgres
我有一個帶有JSON的JSONB列,如下所示:
{“ id”:“ 3”,“ username”:“ abcdef”}
有沒有辦法將JSON更新為:
{“ id”:3,“用戶名”:“ abcdef”}
select json_build_object('id',CAST(j->>'id' AS NUMERIC),'username',j->>'username')::jsonb from (
select '{"id" : "3", "username" : "abcdef"}' :: jsonb AS j
)t
使用連接運算符||更新jsonb列 ,例如:
create table example(id int, js jsonb);
insert into example values
(1, '{"id": "3", "username": "abcdef"}');
update example
set js = js || jsonb_build_object('id', (js->>'id')::int)
returning *;
id | js
----+---------------------------------
1 | {"id": 3, "username": "abcdef"}
(1 row)
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