Re: help with version checking

> I tried to do the following in PostgreSQL:
> 
> DECLARE
>    v_version VARCHAR;
> 
> BEGIN
>    SELECT version INTO v_version FROM 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;
> 
> //The upgrade stuff
> 
> but when I execute it, gives a lot of errors:
> 
> psql -d dermagier -f upgrade_agenda.sql
> psql:upgrade_agenda.sql:2: ERROR:  syntax error at or near "VARCHAR" at
> character 21
> psql:upgrade_agenda.sql:5: ERROR:  syntax error at or near "SELECT" at
> character 9
> psql:upgrade_agenda.sql:8: ERROR:  syntax error at or near "IF" at
> character 3
> psql:upgrade_agenda.sql:9: ERROR:  syntax error at or near "IF" at
> character 7
> psql:upgrade_agenda.sql:11: WARNING:  there is no transaction in progress
> COMMIT
> 
> 
> Anybody knows how I can do this or which is the best way to do it?
> 

You should define a PL/PGSQL function such as:

CREATE OR REPLACE FUNCTION check_version() RETURNS void
AS $$
DECLARE v_version VARCHAR;
BEGIN SELECT version INTO v_version FROM version WHERE id = 1; IF v_version <> '1.0.0.0' THEN   RAISE EXCEPTION 'This
scriptneeds Agenda version 1.0.0.0, detected
 
version %', v_version; END IF;
END;
$$ LANGUAGE PLPGSQL;


Regards,

--
Daniel