On Wed, 21 Aug 2024 08:17:45 +0200
Peter Eisentraut <pe...@eisentraut.org> wrote:

> A USING clause when altering the type of a generated column does not 
> make sense.  It would write the output of the USING clause into the 
> converted column, which would violate the generation  expression.
> 
> This patch adds a check to error out if this is specified.

I’m afraid you forgot to attach the patch.
It seems for me that this fix is reasonable though.

Regards,
Yugo Nagata

> 
> There was a test for this, but that test errored out for a different 
> reason, so it was not effective.
> 
> discovered by Jian He at [0]
> 
> [0]: 
> https://www.postgresql.org/message-id/cacjufxegpytfe79hbsmeoboivfnnprsw7gjvk67m1x2mqgg...@mail.gmail.com
> 
> 


-- 
Yugo Nagata <nag...@sraoss.co.jp>


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