From: | "Ruben Gouveia" <rubes7202(at)gmail(dot)com> |
---|---|
To: | "Scott Marlowe" <scott(dot)marlowe(at)gmail(dot)com> |
Cc: | pgsql-sql <pgsql-sql(at)postgresql(dot)org> |
Subject: | Re: Function syntax ? |
Date: | 2008-09-09 18:11:59 |
Message-ID: | 51e507b0809091111nf208254ue796b95cddac77d5@mail.gmail.com |
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Thread: | |
Lists: | pgsql-sql |
When i tried that, i got the following error:
create or replace function fcn_max_dt(p_dt timestamp without time zone,
p_dt2 timestamp without time zone)
returns timestamp without time zone as $$
BEGIN
v_dt := p_dt;
v_dt2 := p_dt2;
if v_dt >= v_dt2 then
return v_dt;
else
return v_dt2;
end if;
END;
$$ LANGUAGE 'plpgsql';
ERROR: syntax error at or near "v_dt" at character 1
QUERY: v_dt := $1
CONTEXT: SQL statement in PL/PgSQL function "fcn_max_dt" near line 3
********** Error **********
ERROR: syntax error at or near "v_dt"
SQL state: 42601
Context: SQL statement in PL/PgSQL function "fcn_max_dt" near line 3
On Tue, Sep 9, 2008 at 11:07 AM, Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>wrote:
> On Tue, Sep 9, 2008 at 11:55 AM, Ruben Gouveia <rubes7202(at)gmail(dot)com>
> wrote:
> > Does this syntax look correct? Can anyone think of a better way to write
> > this?
> >
> > This function will accept two timestamp parameters and determine the
> highest
> > of the two?
> >
> > create or replace function fcn_max_dt(p_dt timestamp without time zone,
> > p_dt2 timestamp without time zone)
> > returns timestamp without time zone as $$
> > DECLARE
> > v_dt timestamp without time zone;
> > v_dt2 timestamp without time zone;
> >
> > BEGIN
> > v_dt := p_dt;
> > v_dt2 := p_dt2;
> >
> > if v_dt >= v_dt2 then
> > return v_dt;
> > else
> > return v_dt2;
> > end if;
> >
> > END;
> > $$ LANGUAGE 'plpgsql';
>
> It certainly works, but there's no real need for the declarations.
> This works just as well:
>
> create or replace function fcn_max_dt(p_dt timestamp without time zone,
> p_dt2 timestamp without time zone)
> returns timestamp without time zone as $$
>
> BEGIN
> if p_dt >= p_dt2 then
> return p_dt;
> else
> return p_dt2;
> end if;
>
> END;
> $$ LANGUAGE 'plpgsql';
>
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