| From: | Adrian Klaver <adrian(dot)klaver(at)gmail(dot)com> |
|---|---|
| To: | Perry Smith <pedzsan(at)gmail(dot)com> |
| Cc: | pgsql-general <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: "Pretend" update |
| Date: | 2013-10-01 17:23:33 |
| Message-ID: | 524B0515.5010106@gmail.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
On 10/01/2013 10:16 AM, Perry Smith wrote:
> With "make" I can do "make -n" and it just tells me what it would do but doesn't actually do anything.
>
> How could I do that with SQL?
>
> I want to write a really complicated (for me) SQL UPDATE statement. I'm sure I won't get it right the first time. Is there an easy way to not really make the changes?
>
> I've thought about starting a transaction and then roll it back. That would undo the changes. But I won't be able to tell what the changes were.
Assuming you are not doing this in a function, you can. Do UPDATE, then
SELECT to see your changes or not and then ROLLBACK.
>
> Thank you for your time,
> Perry
>
--
Adrian Klaver
adrian(dot)klaver(at)gmail(dot)com
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