Обсуждение: Create array of data from JSONB in PG 9.5

Hi,

I wrote the below SQL which works and give me what I want, but it doesn’t work in 9.5 version. I wrote this query in PG
10.I want to change it so that I can run it on 9.5 as production using 9.5 version. I need help on this. 

SELECT DISTINCT
    ARRAY [jsonb_array_elements(data) ->> 'group', jsonb_array_elements(jsonb_array_elements(data) -> 'properties') ->>
'name']
FROM
    "vessels"
WHERE
    "vessels"."deleted_at" IS NULL
    AND "vessels"."company_id" = '7d105acd-be5a-4225-a2db-b549105e4172';


When I ran the same query to production I get error:

ERROR:  set-valued function called in context that cannot accept a set


Thanks,

Arup Rakshit
ar@zeit.io

On 11/15/19 2:01 AM, Arup Rakshit wrote:
> Hi,
> 
> I wrote the below SQL which works and give me what I want, but it doesn’t work in 9.5 version. I wrote this query in
PG10. I want to change it so that I can run it on 9.5 as production using 9.5 version. I need help on this.
 
> 
> SELECT DISTINCT
>     ARRAY [jsonb_array_elements(data) ->> 'group', jsonb_array_elements(jsonb_array_elements(data) -> 'properties')
->>'name']
 
> FROM
>     "vessels"
> WHERE
>     "vessels"."deleted_at" IS NULL
>     AND "vessels"."company_id" = '7d105acd-be5a-4225-a2db-b549105e4172';
> 
> 
> When I ran the same query to production I get error:
> 
> ERROR:  set-valued function called in context that cannot accept a set

I would break this down into smaller units to see what is actually 
triggering the above ERROR. In other words run the 
jsonb_array_elements() independently and then start adding them together.

> 
> 
> Thanks,
> 
> Arup Rakshit
> ar@zeit.io
> 
> 
> 
> 
> 
> 


-- 
Adrian Klaver
adrian.klaver@aklaver.com

Arup Rakshit <ar@zeit.io> writes:
> I wrote the below SQL which works and give me what I want, but it doesn’t work in 9.5 version. I wrote this query in
PG10. I want to change it so that I can run it on 9.5 as production using 9.5 version. I need help on this. 

> SELECT DISTINCT
>     ARRAY [jsonb_array_elements(data) ->> 'group', jsonb_array_elements(jsonb_array_elements(data) -> 'properties')
->>'name'] 
> FROM
>     "vessels"
> WHERE
>     "vessels"."deleted_at" IS NULL
>     AND "vessels"."company_id" = '7d105acd-be5a-4225-a2db-b549105e4172';

> When I ran the same query to production I get error:
> ERROR:  set-valued function called in context that cannot accept a set

IIRC, you can't nest calls of set-returning functions before about v10.
One workaround is to put the inner set-returning function call into a
sub-select.

            regards, tom lane