Re: The P0004 assert_failure exception assert_failure exception seems to be unhandleable

> david(dot)g(dot)johnston(at)gmail(dot)com wrote:
>
>> bryn(at)yugabyte(dot)com wrote:
>>
>> «
>> Note that ASSERT is meant for detecting program bugs, not for reporting ordinary error conditions. Use the RAISE statement, described above, for that.
>> »
>>
>> But it takes quite a stretch of the imagination to infer that this means that the "assert_failure" exception cannot be handled.
>
> Agreed. But as the pl/pgsql section “trapping errors” notes:
>
> “The special condition name OTHERS matches every error type except QUERY_CANCELED and ASSERT_FAILURE. (It is possible, but often unwise, to trap those two error types by name.)”
>
> i.e., you must trap it explicitly, not as part of others.

Thanks again, David. I don't yet know my way around the overall PG doc well enough to make sure that I read everything that relates to my current interest. Thanks for reminding me about this:

43.6.8. Trapping Errors
https://www.postgresql.org/docs/14/plpgsql-control-structures.html#PLPGSQL-ERROR-TRAPPING

in the section:

43.6. Control Structures
https://www.postgresql.org/docs/14/plpgsql-control-structures.html

in chapter:

Chapter 43. PL/pgSQL — SQL Procedural Language
https://www.postgresql.org/docs/14/plpgsql.html

All is clear now. And the caveat "It is possible, but often unwise, to trap those two error types by name" makes sense.