Re: POC PATCH: copy from ... exceptions to: (was Re: VLDB Features)

On 2023-09-15 19:02, Damir Belyalov wrote:
>> Since v5 patch failed applying anymore, updated the patch.
> 
> Thank you for updating the patch . I made a little review on it where
> corrected some formatting.
> 

Thanks for your review and update!
I don't have objections the modification of the codes and comments.
Although v7 patch doesn't have commit messages on the patch, I think 
leave commit message is good for reviewers.

>>> - COPY with a datatype error that can't be handled as a soft error
>> 
>> I didn't know proper way to test this, but I've found data type
>> widget's
>> input function widget_in() defined to occur hard-error in regress.c,
>> attached patch added a test using it.
> 
> This test seems to be weird a bit, because of the "widget" type. The
> hard error is thrown by the previous test with missing data. Also
> it'll be interesting for me to list all cases when a hard error can be
> thrown.

Although missing data error is hard error, the suggestion from Andres 
was adding `dataype` error:

> - COPY with a datatype error that can't be handled as a soft error

As described in widghet_in(), widget is intentionally left emitting hard 
error for testing purpose:

>   * Note: DON'T convert this error to "soft" style (errsave/ereturn).  
> We
>   * want this data type to stay permanently in the hard-error world so 
> that
>   * it can be used for testing that such cases still work reasonably.

 From this point of view, I think this is a supposed way of using widget.
OTOH widget is declared in create_type.sql and I'm not sure it's ok to 
use it in another test copy2.sql.

-- 
Regards,

--
Atsushi Torikoshi
NTT DATA Group Corporation