Обсуждение: How to select values in a JSON type of column?
Hi!
I have a column called
The column looks like
targeting in a table called campaigns .The column looks like
{
"targets": [
{
"audienceSegments": [
{
"includes": [
{
"consumer": "selection",
"segments": {
"allOf": [
{
"provider": "a",
"ids": [
{
"id": "110418"
},
{
"id": "110430"
},
{
"id": "110433"
}
]
}
]
}
}
],
"excludes": [
{
"consumer": "selection",
"segments": {
"allOf": [
{
"provider": "a",
"ids": [
{
"id": "109776"
}
]
}
]
}
}
]
}
]
}
]
}
and I need to select all the
Currently, I am doing it like this
ids in includes.Currently, I am doing it like this
SELECT
targeting#>'{targets,0,audienceSegments,0,includes,0,segments,allOf,0,ids}'FROM campaigns; and that works, but, I don’t want to have a fixed path because positions could change like 0 could become 1,
Any idea of how to always select
includes and excludes could change positions, allOf could be anyOf etc.Any idea of how to always select
ids in includes no matter the changes?Thank you!
Anna
On Wednesday, November 18, 2020, Snjezana Frketic <frketic.snjezana@gmail.com> wrote:
SELECTtargeting#>'{targets,0,audienceSegments,0,includes,0, segments,allOf,0,ids}'FROM campaigns; and that works, but, I don’t want to have a fixed path because positions could change like 0 could become 1,includesandexcludescould change positions,allOfcould beanyOfetc.
Any idea of how to always selectidsinincludesno matter the changes?
Maybe it can be done using json path:
David J.
I looked at it yesterday, but I couldn't figure it out because my JSON is more nested and I got lost going down the path.
On Wed, 18 Nov 2020 at 15:40, David G. Johnston <david.g.johnston@gmail.com> wrote:
On Wednesday, November 18, 2020, Snjezana Frketic <frketic.snjezana@gmail.com> wrote:SELECTtargeting#>'{targets,0,audienceSegments,0,includes,0,segments,allOf,0,ids}'FROM campaigns;and that works, but, I don’t want to have a fixed path because positions could change like 0 could become 1,includesandexcludescould change positions,allOfcould beanyOfetc.
Any idea of how to always selectidsinincludesno matter the changes?Maybe it can be done using json path:David J.
Snjezana Frketic schrieb am 18.11.2020 um 11:29:
> I have a column called |targeting| in a table called |campaigns| .
> [...]
> and I need to select all the |ids| in |includes|.
> Currently, I am doing it like this
>
> SELECT |targeting#>'{targets,0,audienceSegments,0,includes,0,segments,allOf,0,ids}'FROM campaigns;|
>
If you are on Postgres 12 or later, this can be done using jsonb_path_query_array:
select jsonb_path_query_array(targeting, '$.targets[*].*.includes.**.ids.id')
from campaigns
Online example: https://dbfiddle.uk/?rdbms=postgres_12&fiddle=ee7f6e73055ffb3a98fcfd3d86763e35
Thomas
I actually have version 9.3.17 😬
On Wed, 18 Nov 2020 at 15:55, Thomas Kellerer <shammat@gmx.net> wrote:
Snjezana Frketic schrieb am 18.11.2020 um 11:29:
> I have a column called |targeting| in a table called |campaigns| .
> [...]
> and I need to select all the |ids| in |includes|.
> Currently, I am doing it like this
>
> SELECT |targeting#>'{targets,0,audienceSegments,0,includes,0,segments,allOf,0,ids}'FROM campaigns;|
>
If you are on Postgres 12 or later, this can be done using jsonb_path_query_array:
select jsonb_path_query_array(targeting, '$.targets[*].*.includes.**.ids.id')
from campaigns
Online example: https://dbfiddle.uk/?rdbms=postgres_12&fiddle=ee7f6e73055ffb3a98fcfd3d86763e35
Thomas
Unfortunately, I also can not update my version :)
On Wed, 18 Nov 2020 at 17:00, Snjezana Frketic <frketic.snjezana@gmail.com> wrote:
I actually have version 9.3.17 😬On Wed, 18 Nov 2020 at 15:55, Thomas Kellerer <shammat@gmx.net> wrote:Snjezana Frketic schrieb am 18.11.2020 um 11:29:
> I have a column called |targeting| in a table called |campaigns| .
> [...]
> and I need to select all the |ids| in |includes|.
> Currently, I am doing it like this
>
> SELECT |targeting#>'{targets,0,audienceSegments,0,includes,0,segments,allOf,0,ids}'FROM campaigns;|
>
If you are on Postgres 12 or later, this can be done using jsonb_path_query_array:
select jsonb_path_query_array(targeting, '$.targets[*].*.includes.**.ids.id')
from campaigns
Online example: https://dbfiddle.uk/?rdbms=postgres_12&fiddle=ee7f6e73055ffb3a98fcfd3d86763e35
Thomas
On Wed, Nov 18, 2020 at 9:23 AM Snjezana Frketic <frketic.snjezana@gmail.com> wrote:
Unfortunately, I also can not update my version :)
Then probably the answer to your original question is no :)
There are possibly other ways to make something that works but if you aren't willing to upgrade off of a discontinued version, onto one which has a perfectly usable solution, then my interest in pondering a work-around is near zero.
David J.
Fair point.
Appreciate your help nevertheless :)
On Wed, 18 Nov 2020 at 17:30, David G. Johnston <david.g.johnston@gmail.com> wrote:
On Wed, Nov 18, 2020 at 9:23 AM Snjezana Frketic <frketic.snjezana@gmail.com> wrote:Unfortunately, I also can not update my version :)Then probably the answer to your original question is no :)There are possibly other ways to make something that works but if you aren't willing to upgrade off of a discontinued version, onto one which has a perfectly usable solution, then my interest in pondering a work-around is near zero.David J.
Snjezana Frketic schrieb am 18.11.2020 um 17:00:
> I actually have version 9.3.17 😬
>
>
> On Wed, 18 Nov 2020 at 15:55, Thomas Kellerer <shammat@gmx.net <mailto:shammat@gmx.net>> wrote:
>
> Snjezana Frketic schrieb am 18.11.2020 um 11:29:
> > I have a column called |targeting| in a table called |campaigns| .
> > [...]
> > and I need to select all the |ids| in |includes|.
> > Currently, I am doing it like this
> >
> > SELECT |targeting#>'{targets,0,audienceSegments,0,includes,0,segments,allOf,0,ids}'FROM campaigns;|
> >
>
> If you are on Postgres 12 or later, this can be done using jsonb_path_query_array:
>
> select jsonb_path_query_array(targeting, '$.targets[*].*.includes.**.ids.id <http://ids.id>')
> from campaigns
If you are limited to an unsupported version, you need to go down the hierarchy manually:
select t.ids
from campaigns c
cross join lateral (
select array_agg(s2.seg2 ->> 'id') as ids
from json_array_elements(c.targeting -> 'targets') as t(target)
cross join json_array_elements(t.target -> 'audienceSegments') as a(aud)
cross join json_array_elements(a.aud -> 'includes') as i(include)
cross join json_array_elements(i.include #> '{segments,allOf}') as s(seg)
cross join json_array_elements(s.seg -> 'ids') as s2(seg2)
) t