Re: BUG #17845: insert into on conflict bug .

On Thursday, March 16, 2023, PG Bug reporting form <noreply(at)postgresql(dot)org>
wrote:

> The following bug has been logged on the website:
>
> Bug reference: 17845
> Logged by: Zhou Digoal
> Email address: digoal(at)126(dot)com
> PostgreSQL version: 15.2
> Operating system: macos
> Description:
>
> insert into on conflict bug .
> In the following insert statement, the row has not been updated multiple
> times, why is it still showing an error?
>
> ```
> create table a (id int primary key, info text, ts date);
>
>
> insert into a
> select * from (values (1,'a',date '2022-01-01'),(1,'b',date
> '2022-01-02'),(1,'c',date '2022-01-03')) as t (id,info,ts) order by ts
> desc
> on conflict (id)
> do update set info=excluded.info, ts=excluded.ts where a.ts < excluded.ts
> ;
>
>
You have id=1 in there three times which is precisely the definition of
“multiple times” (I.e., more than 1)

David J.