Re: Some questions on PostgreSQL 9.6 JSONB

Stupid question really,

If I have to specify the entire JSON value, this means that the update
query replaces the entire row instead of updating a single field. Is this
correct?

On 28 August 2017 at 16:20, David G. Johnston <david(dot)g(dot)johnston(at)gmail(dot)com>
wrote:

> On Mon, Aug 28, 2017 at 7:06 AM, Keith <keith(at)keithf4(dot)com> wrote:
>
>> On Mon, Aug 28, 2017 at 9:46 AM, Wei Shan <weishan(dot)ang(at)gmail(dot)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(at)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.​
>

--
Regards,
Ang Wei Shan