>> Well, if we provided a different SQLSTATE for each qualitatively
>> different type of libpq error, that might well be useful enough to
>> justify some risk of application breakage. But replacing a constant
>> string that we've had for ~15 years with a different constraint string
>> isn't doing anything about the lack-of-information problem you're
>> complaining about.
>
> True. Well, the original point here was whether psql ought to be doing
> something to mask libpq's (mis) behavior. I'm inclined to think not:
> if it doesn't get a SQLSTATE from the PGresult, it should just set the
> sqlstate variables to empty strings.
See v9 attached.
--
Fabien.
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