Re: JSON/SQL: jsonpath: incomprehensible error message

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Erik Rijkers <er(at)xs4all(dot)nl>
Cc: PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: JSON/SQL: jsonpath: incomprehensible error message
Date: 2022-07-03 21:28:34
Message-ID: 01db0c10-a445-15f7-32a5-bdc7c0073179@dunslane.net
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On 2022-06-30 Th 04:19, Amit Kapila wrote:
> On Wed, Jun 29, 2022 at 6:58 PM Erik Rijkers <er(at)xs4all(dot)nl> wrote:
>> Op 29-06-2022 om 15:00 schreef Amit Kapila:
>>> On Mon, Jun 27, 2022 at 8:46 PM Andrew Dunstan <andrew(at)dunslane(dot)net> wrote:
>>>> On 2022-06-26 Su 11:44, Erik Rijkers wrote:
>>>>> JSON/SQL jsonpath
>>>>>
>>>>> For example, a jsonpath string with deliberate typo 'like_regexp'
>>>>> (instead of 'like_regex'):
>>>>>
>>>>> select js
>>>>> from (values (jsonb '{}')) as f(js)
>>>>> where js @? '$ ? (@ like_regexp "^xxx")';
>>>>>
>>>>> ERROR: syntax error, unexpected IDENT_P at or near " " of jsonpath input
>>>>> LINE 1: ...s from (values (jsonb '{}')) as f(js) where js @? '$ ? (@
>>>>> li...
>>>>>
>>>>> Both 'IDENT_P' and 'at or near " "' seem pretty useless.
>>>>>
>>> removing this. One thing that is not clear to me is why OP sees an
>>> acceptable message (ERROR: syntax error, unexpected invalid token at
>>> or near "=" of jsonpath input) for a similar query in 14?
>> To mention that was perhaps unwise of me because The IDENT_P (or more
>> generally, *_P) messages can be provoked on 14 too.
>>
> Okay, then I think it is better to backpatch this fix.

Done.

cheers

andrew

--
Andrew Dunstan
EDB: https://www.enterprisedb.com

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