Thread: Delete values from JSON

Delete values from JSON

From

Andreas Joseph Krogh

Date:

17 March 2023, 10:56:51

Hi, in PG-14, how do I delete the keys "dunsNumber": "NaN":

{  "sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6",  "details": [    {      "keyInformation": {        "dunsNumber": "NaN",        "organizationType": "LIMITED_COMPANY"      }    },    {      "keyInformation": {        "dunsNumber": "123",        "organizationType": "LIMITED_COMPANY"      }    }  ],  "nisse": 123
}

So that the result becomes:

{  "sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6",  "details": [    {      "keyInformation": {        "organizationType": "LIMITED_COMPANY"      }    },    {      "keyInformation": {        "dunsNumber": "123",        "organizationType": "LIMITED_COMPANY"      }    }  ],  "nisse": 123
}

Thanks.

Andreas Joseph Krogh

CTO / Partner - Visena AS

Mobile: +47 909 56 963

andreas@visena.com

www.visena.com

Attachment

msg-2982098-192.png

Re: Delete values from JSON

From

Romain MAZIÈRE

Date:

17 March 2023, 13:56:22

Hi,

If it is jsonb type, you can have a look at the documentation : https://www.postgresql.org/docs/14/functions-json.html

There are some examples :

jsonb - text → jsonb

Deletes a key (and its value) from a JSON object, or matching string value(s) from a JSON array.

'{"a": "b", "c": "d"}'::jsonb - 'a' → {"c": "d"}

'["a", "b", "c", "b"]'::jsonb - 'b' → ["a", "c"]

jsonb - text[] → jsonb

Deletes all matching keys or array elements from the left operand.

'{"a": "b", "c": "d"}'::jsonb - '{a,c}'::text[] → {}

jsonb - integer → jsonb

Deletes the array element with specified index (negative integers count from the end). Throws an error if JSON value is not an array.

'["a", "b"]'::jsonb - 1 → ["a"]

jsonb #- text[] → jsonb

Deletes the field or array element at the specified path, where path elements can be either field keys or array indexes.

'["a", {"b":1}]'::jsonb #- '{1,b}' → ["a", {}]

Regards

Romain MAZIÈRE
romain.maziere@sigmaz-consilium.fr
+33.535.545.085
+33.781.46.36.96
https://sigmaz-consilium.fr

Le 17/03/2023 à 08:56, Andreas Joseph Krogh a écrit :

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Hi, in PG-14, how do I delete the keys "dunsNumber": "NaN":

{ "sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6", "details": [ { "keyInformation": { "dunsNumber": "NaN", "organizationType": "LIMITED_COMPANY" } }, { "keyInformation": { "dunsNumber": "123", "organizationType": "LIMITED_COMPANY" } } ], "nisse": 123 }

So that the result becomes:

{ "sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6", "details": [ { "keyInformation": { "organizationType": "LIMITED_COMPANY" } }, { "keyInformation": { "dunsNumber": "123", "organizationType": "LIMITED_COMPANY" } } ], "nisse": 123 }

Thanks.

--
Andreas Joseph Krogh
CTO / Partner - Visena AS
Mobile: +47 909 56 963
andreas@visena.com
www.visena.com

Attachment

Re: Delete values from JSON

From

Andreas Joseph Krogh

Date:

17 March 2023, 14:06:05

På fredag 17. mars 2023 kl. 11:56:22, skrev Romain MAZIÈRE <romain.maziere@sigmaz-consilium.fr>:

Hi,
If it is jsonb type, you can have a look at the documentation : https://www.postgresql.org/docs/14/functions-json.html
There are some examples :
jsonb - text → jsonb
Deletes a key (and its value) from a JSON object, or matching string value(s) from a JSON array.
'{"a": "b", "c": "d"}'::jsonb - 'a' → {"c": "d"}
'["a", "b", "c", "b"]'::jsonb - 'b' → ["a", "c"]
jsonb - text[] → jsonb
Deletes all matching keys or array elements from the left operand.
'{"a": "b", "c": "d"}'::jsonb - '{a,c}'::text[] → {}
jsonb - integer → jsonb
Deletes the array element with specified index (negative integers count from the end). Throws an error if JSON value is not an array.
'["a", "b"]'::jsonb - 1 → ["a"]
jsonb #- text[] → jsonb
Deletes the field or array element at the specified path, where path elements can be either field keys or array indexes.
'["a", {"b":1}]'::jsonb #- '{1,b}' → ["a", {}]
Regards

I have looked at the docs, but it doesn't, AFAIU, show how to conditionally delete a key based on its value, and leave other keys in the JSONB not matching the value alone.

I want to delete all keys in the (pseudo) path details.keyInformation[*].dunsNumber if the value is "NaN".

Andreas Joseph Krogh

CTO / Partner - Visena AS

Mobile: +47 909 56 963

andreas@visena.com

www.visena.com

Attachment

msg-2982098-221.png

Re: Delete values from JSON

From

Boris Zentner

Date:

18 March 2023, 16:26:57

Am 17.03.2023 um 08:56 schrieb Andreas Joseph Krogh <andreas@visena.com>:

Hi, in PG-14, how do I delete the keys "dunsNumber": "NaN":

{  "sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6",  "details": [    {      "keyInformation": {        "dunsNumber": "NaN",        "organizationType": "LIMITED_COMPANY"      }    },    {      "keyInformation": {        "dunsNumber": "123",        "organizationType": "LIMITED_COMPANY"      }    }  ],  "nisse": 123
}

So that the result becomes:

{  "sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6",  "details": [    {      "keyInformation": {        "organizationType": "LIMITED_COMPANY"      }    },    {      "keyInformation": {        "dunsNumber": "123",        "organizationType": "LIMITED_COMPANY"      }    }  ],  "nisse": 123
}

Thanks.

Hi Andreas, this works for me.

➤ 2023-03-18 14:23:51 CET bz@[local]:5432/test

=# WITH data(j)

AS (VALUES (CAST('{ "sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6", "details": [ { "keyInformation": { "dunsNumber": "NaN", "organizationType": "LIMITED_COMPANY" } }, { "keyInformation": { "dunsNumber": "123", "organizationType": "LIMITED_COMPANY" } } ], "nisse": 123 }' AS jsonb)))

SELECT jsonb_pretty(jsonb_set(j

, '{details}'

, (SELECT jsonb_agg(CASE

WHEN ((elem -> 'keyInformation') ->> 'dunsNumber') = 'NaN'

THEN jsonb_set(elem

, '{keyInformation}'

, (elem -> 'keyInformation') - 'dunsNumber')

ELSE elem

END)

FROM jsonb_array_elements(data.j -> 'details') AS elem))) AS nice_output

FROM data

;

nice_output

{

"nisse": 123,

"details": [

{

"keyInformation": {

"organizationType": "LIMITED_COMPANY"

}

{

"keyInformation": {

"dunsNumber": "123",

"organizationType": "LIMITED_COMPANY"

}

"sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6"

}

(1 row)

Time: 0,731 ms

Boris

Re: Delete values from JSON

From

Andreas Joseph Krogh

Date:

18 March 2023, 20:07:40

Excellent!

Thanks!

På lørdag 18. mars 2023 kl. 14:26:57, skrev Boris Zentner <bzm@2bz.de>:

Am 17.03.2023 um 08:56 schrieb Andreas Joseph Krogh <andreas@visena.com>:
Hi, in PG-14, how do I delete the keys "dunsNumber": "NaN":
{  "sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6",  "details": [    {      "keyInformation": {        "dunsNumber": "NaN",        "organizationType": "LIMITED_COMPANY"      }    },    {      "keyInformation": {        "dunsNumber": "123",        "organizationType": "LIMITED_COMPANY"      }    }  ],  "nisse": 123
}
So that the result becomes:
{  "sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6",  "details": [    {      "keyInformation": {        "organizationType": "LIMITED_COMPANY"      }    },    {      "keyInformation": {        "dunsNumber": "123",        "organizationType": "LIMITED_COMPANY"      }    }  ],  "nisse": 123
}
Thanks.
Hi Andreas, this works for me.

➤ 2023-03-18 14:23:51 CET bz@[local]:5432/test
=# WITH data(j)
AS (VALUES (CAST('{ "sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6", "details": [ { "keyInformation": { "dunsNumber": "NaN", "organizationType": "LIMITED_COMPANY" } }, { "keyInformation": { "dunsNumber": "123", "organizationType": "LIMITED_COMPANY" } } ], "nisse": 123 }' AS jsonb)))

SELECT jsonb_pretty(jsonb_set(j
, '{details}'
, (SELECT jsonb_agg(CASE
WHEN ((elem -> 'keyInformation') ->> 'dunsNumber') = 'NaN'
THEN jsonb_set(elem
, '{keyInformation}'
, (elem -> 'keyInformation') - 'dunsNumber')
ELSE elem
END)
FROM jsonb_array_elements(data.j -> 'details') AS elem))) AS nice_output
FROM data
;
nice_output
{
"nisse": 123,
"details": [
{
"keyInformation": {
"organizationType": "LIMITED_COMPANY"
}
},
{
"keyInformation": {
"dunsNumber": "123",
"organizationType": "LIMITED_COMPANY"
}
}
],
"sessionId": "ce6fc9d0-5923-4d71-9f7e-ae60f35c45d6"
}
(1 row)
Time: 0,731 ms

--
Boris

Andreas Joseph Krogh

CTO / Partner - Visena AS

Mobile: +47 909 56 963

andreas@visena.com

www.visena.com

Attachment

msg-2982098-359.png