Horton

Re: recently added jsonpath method change jsonb_path_query, jsonb_path_query_first immutability

Andrew Dunstan <andrew@dunslane.net>

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From: Andrew Dunstan <andrew@dunslane.net>
To: jian he <jian.universality@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Cc: Jeevan Chalke <jeevan.chalke@enterprisedb.com>
Date: 2024-02-06T11:55:36Z
Lists: pgsql-hackers

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  1. Implement various jsonpath methods

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.
>
> 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