Re: Getting json-value as varchar

På torsdag 06. januar 2022 kl. 13:31:19, skrev Thomas Markus <
t(dot)markus(at)proventis(dot)net <mailto:t(dot)markus(at)proventis(dot)net>>: Hi,

Am 06.01.22 um 13:28 schrieb Andreas Joseph Krogh:
Hi, in PG-14 this query returns "value" (with double-quotes):
SELECT ('{"key":"value"}'::jsonb)['key'];
┌─────────┐
│ jsonb │
├─────────┤
│ "value" │
└─────────┘
(1 row)

and this returns 'value' (without the quotes):
SELECT ('{"key":"value"}'::jsonb)->> 'key';
┌──────────┐
│ ?column? │
├──────────┤
│ value │
└──────────┘
(1 row)

How to I use the subscript syntax and get the result as varchar instead of
JSONB, assuming Iknow the JSON-field is a String? simply cast your value
SELECT (('{"key":"value"}'::jsonb)->> 'key')::text;

best regards
Thoma

I think you misread my message. What I want is for the subscript-version:
('{"key":"value"}'::jsonb)['key']
to return:

┌──────────┐
│ ?column? │
├──────────┤
│ value │
└──────────┘

instead of

┌─────────┐
│ jsonb │
├─────────┤
│ "value" │
└─────────┘

--
Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47 909 56 963
andreas(at)visena(dot)com <mailto:andreas(at)visena(dot)com>
www.visena.com <https://www.visena.com>
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