From: PG Bug reporting form <noreply@postgresql.org>
To: pgsql-bugs@lists.postgresql.org
Cc: nat@makarevitch.org
Subject: BUG #18730: Inequality comparison operators and SMALLINT negative immediate value
Date: Tue, 03 Dec 2024 01:31:44 +0000
Message-ID: <18730-0410c43cdb0229d8@postgresql.org> (raw)
The following bug has been logged on the website:
Bug reference: 18730
Logged by: Nat Makarevitch
Email address: nat@makarevitch.org
PostgreSQL version: 17.2
Operating system: Linux
Description:
Hi!
create table test_smallint(smint smallint);
insert into test_smallint values (-1);
select * from test_smallint where smint<>-2;
smint
═══════
-1
(1 row)
BEWARE: there is a space between '=' and '-':
select * from test_smallint where smint!= -2;
smint
═══════
-1
(1 row)
So far, so good.
BEWARE: there isn't any space between '=' and '-':
select * from test_smallint where smint!=-2;
ERROR: operator does not exist: smallint !=- integer
LINE 1: select * from test_smallint where smint!=-2;
^
HINT: No operator matches the given name and argument types. You might need
to add explicit type casts.
Isn't the operator "!=" theoritically "an alias, which is converted to <> at
a very early stage of parsing" (as per
https://www.postgresql.org/docs/17/functions-comparison.html )?
AFAIK there is no "=-" alias/macro, and I can't see any reason to implicitly
cast "-2" to INTEGER while "2" type stays inferred.
Thank you!
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To: pgsql-bugs@postgresql.org
Cc: noreply@postgresql.org, pgsql-bugs@lists.postgresql.org, nat@makarevitch.org
Subject: Re: BUG #18730: Inequality comparison operators and SMALLINT negative immediate value
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