From: PG Bug reporting form <noreply@postgresql.org>
To: pgsql-bugs@lists.postgresql.org
Cc: david@justatheory.com
Subject: BUG #17694: In JSONPath expressions, characters between leading $ and dot appear to be ignored
Date: Wed, 23 Nov 2022 20:11:04 +0000
Message-ID: <17694-2f7d9576ae277d64@postgresql.org> (raw)
The following bug has been logged on the website:
Bug reference: 17694
Logged by: David Wheeler
Email address: david@justatheory.com
PostgreSQL version: 15.1
Operating system: macOS
Description:
The correct way to specify an absolute JSON path expression is to start with
`$.`, as in:
```
david=# select '{"foo": 1}' @? '$.foo';
?column?
----------
t
```
If, however, you omit the dot (`.`), the expression incorrectly always
evaluates to true!
```
david=# select '{"foo": 1}' @? '$foo';
?column?
----------
t
david=# select '{"foo": 1}' @? '$"foo bar"';
?column?
----------
t
david=# select '{"foo": 1}' @? '$"foo bar".bar';
?column?
----------
f
```
It looks like the text between the `$` and `.` is ignored. I don't think
this is right. Shouldn't it be a syntax error? Seems to properly complain if
using the same pattern in subpaths:
```
david=# select '{"foo": 1}' @? '$.foo"foo bar"';
ERROR: syntax error at or near """ of jsonpath input
LINE 1: select '{"foo": 1}' @? '$.foo"foo bar"';
```
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To: pgsql-bugs@postgresql.org
Cc: noreply@postgresql.org, pgsql-bugs@lists.postgresql.org, david@justatheory.com
Subject: Re: BUG #17694: In JSONPath expressions, characters between leading $ and dot appear to be ignored
In-Reply-To: <17694-2f7d9576ae277d64@postgresql.org>
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