From: PG Bug reporting form <noreply@postgresql.org>
To: pgsql-bugs@lists.postgresql.org
Cc: 2322370369@qq.com
Subject: BUG #18857: Abnormal string comparison results
Date: Thu, 20 Mar 2025 09:53:32 +0000
Message-ID: <18857-a9354c81af5b800d@postgresql.org> (raw)
The following bug has been logged on the website:
Bug reference: 18857
Logged by: dlyixue Xu
Email address: 2322370369@qq.com
PostgreSQL version: 17.3
Operating system: Ubuntu 22.04
Description:
When I use a conditional query, I find that it returns results that are not
as expected. After checking, I found that there is a problem with string
comparison here.
As shown in the example below, on the ASCII table ‘?’ is larger than ‘&’. I
don't think ‘t’ should be returned here. In the MySQL database it does
return 0.
Is there some special consideration here?
postgres=# SELECT ('?' <= '&*CcCV5');
?column?
----------
t
(1 row)
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To: pgsql-bugs@postgresql.org
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Subject: Re: BUG #18857: Abnormal string comparison results
In-Reply-To: <18857-a9354c81af5b800d@postgresql.org>
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