Re: [ADMIN] Some questions on PostgreSQL 9.6 JSONB
| От | David G. Johnston |
|---|---|
| Тема | Re: [ADMIN] Some questions on PostgreSQL 9.6 JSONB |
| Дата | |
| Msg-id | CAKFQuwaBRkMYUH-frGJ+koH6=AoVWyTrOSxDugeE4-7jsZv4TA@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: [ADMIN] Some questions on PostgreSQL 9.6 JSONB (Keith <keith@keithf4.com>) |
| Ответы |
Re: [ADMIN] Some questions on PostgreSQL 9.6 JSONB
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| Список | pgsql-admin |
On Mon, Aug 28, 2017 at 9:46 AM, Wei Shan <weishan.ang@gmail.com> wrote:Is this the most efficient way to do it? I'm not sure because this is basically replacing the entire JSON object instead of updating a single field.
keith@keith=# UPDATE json_data SET data = jsonb_set(data, '{account_balance}', '1'::jsonb, false);
This. Note still that in a MVCC (multi-version concurrency controlling) database you never really just update something in place since the old something has to continue to exist at the same time as the new something - at least for a little while.
David J.
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