Re: recently added jsonpath method change jsonb_path_query, jsonb_path_query_first immutability

On Tue, Feb 6, 2024 at 5:25 PM Andrew Dunstan <andrew(at)dunslane(dot)net> wrote:

>
> On 2024-02-05 Mo 22:06, jian he wrote:
>
>
> Hi.
> this commit [0] changes immutability of jsonb_path_query, jsonb_path_query_first?
> If so, it may change other functions also.
>
>
Thanks for reporting Jian.

Added checkTimezoneIsUsedForCast() check where ever we are casting
timezoned to non-timezoned types and vice-versa.

Thanks

>
> demo:
>
> begin;
> SET LOCAL TIME ZONE 10.5;
> with cte(s) as (select jsonb '"2023-08-15 12:34:56 +05:30"')
>
> select jsonb_path_query(s,
> '$.timestamp_tz()')::text,'+10.5'::text,'timestamp_tz'::text from cte
> union all
> select jsonb_path_query(s, '$.time()')::text,'+10.5'::text, 'time'::text
> from cte
> union all
> select jsonb_path_query(s,
> '$.timestamp()')::text,'+10.5'::text,'timestamp'::text from cte
> union all
> select jsonb_path_query(s, '$.date()')::text,'+10.5'::text, 'date'::text
> from cte
> union all
> select jsonb_path_query(s, '$.time_tz()')::text,'+10.5'::text,
> 'time_tz'::text from cte;
>
> SET LOCAL TIME ZONE -8;
> with cte(s) as (select jsonb '"2023-08-15 12:34:56 +05:30"')
> select jsonb_path_query(s,
> '$.timestamp_tz()')::text,'-8'::text,'timestamp_tz'::text from cte
> union all
> select jsonb_path_query(s, '$.time()')::text,'-8'::text, 'time'::text from
> cte
> union all
> select jsonb_path_query(s,
> '$.timestamp()')::text,'-8'::text,'timestamp'::text from cte
> union all
> select jsonb_path_query(s, '$.date()')::text,'-8'::text, 'date'::text from
> cte
> union all
> select jsonb_path_query(s, '$.time_tz()')::text,'-8'::text,
> 'time_tz'::text from cte;
> commit;
>
>
> [0]
> https://git.postgresql.org/cgit/postgresql.git/commit/?id=66ea94e8e606529bb334515f388c62314956739e
>
>
> ouch. Good catch. Clearly we need to filter these like we do for the
> .datetime() method.
>
>
> cheers
>
>
> andrew
>
> --
> Andrew Dunstan
> EDB: https://www.enterprisedb.com
>
>

--
Jeevan Chalke

*Principal, ManagerProduct Development*

edbpostgres.com