| From: | Christophe Pettus <xof(at)thebuild(dot)com> |
|---|---|
| To: | Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> |
| Cc: | stan <stanb(at)panix(dot)com>, pgsql-general(at)lists(dot)postgresql(dot)org |
| Subject: | Re: Can I trigger an action from a coalesce ? |
| Date: | 2020-02-22 21:06:57 |
| Message-ID: | BF12101F-CC34-4C75-B770-78B544AEEB70@thebuild.com |
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| Lists: | pgsql-general |
> On Feb 22, 2020, at 13:05, Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> wrote:
>
> On 2/22/20 1:02 PM, stan wrote:
>> I have a case where if a value does not exist, I am going to use a default,
>> which is easy with coalesce. But I would like to warn the user that a
>> default has been supplied. The default value is reasonable, and could
>> actually come from the source table, so I can't just check the value.
>> I'd like to do a raise NOTICE, if the default portion of the coalesce fires.
>> Anyone have a good way to accomplish this?
>
> No.
You can, of course, create a PL/pgSQL function and use that as the default.
--
-- Christophe Pettus
xof(at)thebuild(dot)com
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