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Thread: The != and +/- signs are joined together as an operator

The != and +/- signs are joined together as an operator

From
"谭忠涛"
Date:
case:
select 1 !=-1;
select 1 !=+1;


Regards

谭忠涛   数据研究院数据库事业部
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Re: The != and +/- signs are joined together as an operator

From
"David G. Johnston"
Date:
On Tuesday, March 18, 2025, 谭忠涛 <zhongtao.tan@seaboxdata.com> wrote:
case:
select 1 !=-1;
select 1 !=+1;


Explain why you think it is a bug.  From what I see those are potentially valid operator names that do not exist so “operator not found” is the correct outcome.

David J.
 

Re: The != and +/- signs are joined together as an operator

From
Tom Lane
Date:
"David G. Johnston" <david.g.johnston@gmail.com> writes:
> On Tuesday, March 18, 2025, 谭忠涛 <zhongtao.tan@seaboxdata.com> wrote:
>> select 1 !=-1;
>> select 1 !=+1;

> Explain why you think it is a bug.  From what I see those are potentially
> valid operator names that do not exist so “operator not found” is the
> correct outcome.

Our rules for operator names are here:

https://www.postgresql.org/docs/current/sql-syntax-lexical.html#SQL-SYNTAX-OPERATORS

            regards, tom lane