Re: help with version checking

Arnau wrote:
> Tom Lane wrote:
>> Arnau <arnaulist(at)andromeiberica(dot)com> writes:
>>> I don't want, if it's possible, to create a function.
>>
>> Unlike Oracle, PG makes a strong distinction between SQL and
>> programmable languages (including plpgsql). You can't write
>> plpgsql code without putting it into a function.
>>
>> regards, tom lane
>>
>
> I've tried Daniel's suggestion but the Raise doesn't terminate the
> script execution, so if doesn't do what I need. Notice the Update 1
>
> arebassa(at)beowulf:~$ psql -d dermagier -f upgrade_agenda.sql
> CREATE FUNCTION
> psql:upgrade_agenda.sql:16: ERROR: This script needs Agenda version
> 1.0.0.0, detected version 1.0.0.1
> UPDATE 1
>
>

I paste the script I have created:

CREATE OR REPLACE FUNCTION check_version() RETURNS void
AS '
DECLARE
v_version VARCHAR;

BEGIN
SELECT version INTO v_version FROM agenda_version WHERE id = 1;

IF v_version <> ''1.0.0.0'' THEN
RAISE EXCEPTION ''This script needs Agenda version 1.0.0.0,
detected version %'', v_version;
END IF;

END;
' LANGUAGE 'plpgsql';

SELECT check_version();

UPDATE agenda_version set version = '1.0.0.1' where id = 1;

--
Arnau