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help / color / mirror / Atom feedFrom: gmail Vladimir Koković <[email protected]>
To: David G. Johnston <[email protected]>
Cc: pgsql-novice <[email protected]>
Cc: Ken Benson <[email protected]>
Subject: Re: chr(3) and 3::text
Date: Sat, 28 Mar 2020 16:09:47 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAKFQuwaMQCb4QNA1+q8-3ZBgTMdoWFnvvSfUP4z6L5E7uCQOQw@mail.gmail.com>
References: <[email protected]>
<CAKFQuwaMQCb4QNA1+q8-3ZBgTMdoWFnvvSfUP4z6L5E7uCQOQw@mail.gmail.com>
David,
Sorry for copy/paste error:replace(Filler,3::text,'') WRONG !
Character 0x03 is valid in ASCII and UTF-8 character sets.
Main question is, why is 3::text == '3' ?
On 28.3.20. 16:04, David G. Johnston wrote:
> On Sat, Mar 28, 2020 at 6:21 AM gmail Vladimir Koković
> <[email protected] <mailto:[email protected]>> wrote:
>
>
> replace(Filler,chr(3),'') WORKS
>
> replace(Filler3::text,'') WRONG
>
> "Wrong" is not a helpful term unless you describe what you are
> expecting and how the result you got is different. In particular just
> reading what you've typed the "wrong" one fails because you forgot the
> comma between "Fillter" and "3::text". But I suspect you had a
> different unsaid expectation here.
>
> In the future you should consider writing self-contained expressions,
> ideally ones that don't use physical tables if the problem permits.
>
> David J.
>
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