Re: Function syntax ?

It appears there is already a greatest() and least() function available...so
no need for creating this function.

On Tue, Sep 9, 2008 at 11:16 AM, Ruben Gouveia <rubes7202(at)gmail(dot)com> wrote:

> thanks pavel...that worked! I like the simplicity of your first suggestion.
>
>
> On Tue, Sep 9, 2008 at 11:05 AM, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>wrote:
>
>> try
>>
>> create or replace function fcn_max_dt(p_dt timestamp without time zone,
>> p_dt2 timestamp without time zone)
>> returns imestamp without time zone as $$
>> select greatest($1,$2);
>> $$ language sql;
>>
>> or
>>
>> begin
>> return greatest(p_dt, p_dt2);
>> end;
>> $$ language plpgsql;
>>
>> or
>> begin
>> if p_dt > p_dt2 then
>> return p_dt;
>> else
>> return p_dt2;
>> end if;
>> end;
>> $$ language sql;
>>
>> plpgsql is scripting language and almost is better minimalize number
>> of statements in function.
>>
>> Regards
>> Pavel Stehule
>>
>> 2008/9/9 Ruben Gouveia <rubes7202(at)gmail(dot)com>:
>> > 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';
>> >
>> >
>> >
>>
>
>