Re: BUG #18523: String compare not consistent

From: Patrick van Dijk <patrick(dot)van(dot)dijk(at)gmail(dot)com>
To: patrick(dot)van(dot)dijk(at)gmail(dot)com, pgsql-bugs(at)lists(dot)postgresql(dot)org
Subject: Re: BUG #18523: String compare not consistent
Date: 2024-06-26 10:11:50
Message-ID: CAEf=80q9DjTPH4n5KJTxGEkAVfMq+5DeeXniASDq-nupf_+u+w@mail.gmail.com
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I am getting more curious, WIndows is consistent, but Azure/Linux is not.

select '.' < '0'; -- true, true
select '.x' < '0x'; -- false, true
select '.1' < '01'; -- false, true
select '..' < '0.'; -- true, true
select '..1' < '0.1'; -- false, true

On Wed, Jun 26, 2024 at 11:44 AM Patrick van Dijk <
patrick(dot)van(dot)dijk(at)gmail(dot)com> wrote:

> On Windows: PostgreSQL 16.2, compiled by Visual C++ build 1937, 64-bit
> On Azure: PostgreSQL 16.3 on x86_64-pc-linux-gnu, compiled by gcc (GCC)
> 11.2.0, 64-bit
>
>
>
>
> On Wed, Jun 26, 2024 at 11:44 AM PG Bug reporting form <
> noreply(at)postgresql(dot)org> wrote:
>
>> The following bug has been logged on the website:
>>
>> Bug reference: 18523
>> Logged by: Patrick van Dijk
>> Email address: patrick(dot)van(dot)dijk(at)gmail(dot)com
>> PostgreSQL version: 16.3
>> Operating system: Windows vs Linux/Azure
>> Description:
>>
>> When I try the following on a Azure/Linux version of PostgreSQL i see some
>> strange results that are not correct.
>> On Windows the behavior is correct.
>>
>> select '|' < '0'; -- true, true, this is correct
>> select '|1' < '01'; -- false, true, Azure/Linux is wrong
>> select '||' < '0|'; -- true, true, this is correct
>> select '||1' < '0|1'; -- false, true, Azure/Linux is wrong
>>
>> When the first character compares <, then no matter what follows, it
>> should
>> be <...
>>
>>

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