Re: [PATCH v2] Avoid internal error for invalid interval typmods

Hi Feng,

I tested the v2 patch on PostgreSQL 20devel.
The patch applied cleanly, and I rebuilt and restarted the server successfully.

Before applying the patch, calling:
SELECT pg_catalog.interval(interval '1 day', 1539);
reported:
ERROR: unrecognized interval typmod: 1539

After applying the patch, the same DO block produced:
NOTICE: invalid interval typmod rejected
which confirms that the error is now reported as
invalid_parameter_value instead of an internal error.
I also verified that the existing interval behavior remains unchanged:
SELECT interval(0) '1 day 01:23:45.6789'; returned 1 day 01:23:46
SELECT interval(2) '1 day 01:23:45.6789'; returned 1 day 01:23:45.68

The patch worked as expected in my testing.

Regards,
solai