在Postgres中的JSONB列中更改值的类型

Question

我有存储JSON对象的JSONB类型的“主题”列。示例：{"team": "1234", "user": 5678}或{"org": 123}或{“ team”：1234}。

我应该使用哪种查询将所有出现的{“ team”：“ 1234”，...}更改为{“ team”：1234，...}？

我尝试过：

UPDATE the_table SET subject = jsonb_set(subject, '{team}', (subject->>'team')::int)

但是我得到了

ERROR: function jsonb_set(jsonb, unknown, integer) does not exist
LINE 2: SET subject = jsonb_set(subject, 'team', (subject->>'team'):... 
                      ^ 
HINT: No function matches the given name and argument types. You might need to add explicit type casts.

Answer 1

只需将subject->>'team'结果直接转换为jsonb而不是int。不要忘记添加WHERE过滤器，否则您的第二条记录将被删除。

demo:db<>fiddle

UPDATE the_table 
SET subject = jsonb_set(subject, '{team}', (subject->>'team')::jsonb)
WHERE subject->>'team' IS NOT NULL;