Re: How to trap invalid enum input exception?

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От	Leon Starr
Тема	Re: How to trap invalid enum input exception?
Дата	16 августа 2010 г. 17:15:42
Msg-id	458E084A-386F-4967-A2A3-C49C5C945B6D@modelint.com обсуждение исходный текст
Ответ на	Re: How to trap invalid enum input exception? (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы	Re: How to trap invalid enum input exception? (Tom Lane <tgl@sss.pgh.pa.us>)
Список	pgsql-novice

Дерево обсуждения

I've trimmed my example down to the bare minimum in hopes of solving the problem myself, but no luck. Here's the exact code and console session:

create type side as enum ('right', 'left');

create or replace function testinput(

p_units_align side

) returns void as

begin

exception

when SQLSTATE '22P02' then

raise 'Got it';

when INVALID_TEXT_REPRESENTATION then

raise 'Got it';

when OTHERS then

raise 'Got it';

end

language plpgsql;

Then, in the psql console:

contracts=# \i testinput.sql

CREATE FUNCTION

contracts=# select * from testinput('right');

testinput

-----------

(1 row)

contracts=# select * from testinput('blue');

ERROR: 22P02: invalid input value for enum side: "blue"

LINE 1: select * from testinput('blue');

LOCATION: enum_in, enum.c:57

What am I missing?

- Leon

On Aug 15, 2010, at 8:58 PM, Tom Lane wrote:

Leon Starr <leon_starr@modelint.com> writes:
I have tried catching following with no success:
INVALID_TEXT_REPRESENTATION
SQLSTATE '22P02'
SQLSTATE '22000'
DATA_EXCEPTION
OTHERS

(lest we think I am completely incompetent ;), I have had success
catching all manner of FOREIGN_KEY_VIOLATION, UNIQUE_VIOLATION, CHECK_VIOLATION, NO_DATA_FOUND, etc. in other functions. So something is very different about this particular exception!)

It seems to me that it is not a normal exception and evades the exception clause. Any thoughts on where to go from here?

Hmm, maybe the error is not being thrown when/where you think it is?
Coercions of constants, in particular, happen very early and might
possibly need some contortions to catch. Could we see an exact example
of what's not working for you?

regards, tom lane

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