pg.ddx.io pgsql-sql@postgresql.org mailing list archive
help / color / mirror / Atom feedsorting months according to fiscal year
3+ messages / 3 participants
[nested] [flat]
* sorting months according to fiscal year
@ 2011-08-22 13:27 Enzen user <anushka.achaiah@enzentech.com>
2011-08-22 13:39 ` Re: sorting months according to fiscal year Pavel Stehule <pavel.stehule@gmail.com>
2011-08-22 23:58 ` Re: sorting months according to fiscal year Gavin Flower <GavinFlower@archidevsys.co.nz>
0 siblings, 2 replies; 3+ messages in thread
From: Enzen user @ 2011-08-22 13:27 UTC (permalink / raw)
To: pgsql-sql
Hi
I have to rearrange the months according to the fiscal year i.e from April
to march and use the same in the order by clause of a query.
I have written the following postgresql function for the same, but to_number
is returning an error.
Can you please tell me where i'm going wrong?
Instead of the function to_number can you suggest any other function that
will convert a particular month to its corresponding month number(ex:
april=4 or jan=1)
CREATE FUNCTION sort_month(to_number('April','MM')) RETURNS numeric AS $$
DECLARE
BEGIN
CASE WHEN 4 THEN 1
WHEN 5 THEN 2
WHEN 6 THEN 3
WHEN 7 THEN 4
WHEN 8 THEN 5
WHEN 9 THEN 6
WHEN 10 THEN 7
WHEN 11 THEN 8
WHEN 12 THEN 9
WHEN 1 THEN 10
WHEN 2 THEN 11
WHEN 3 THEN 12
ELSE 0
END;
$$ LANGUAGE plpgsql;
--
View this message in context: http://postgresql.1045698.n5.nabble.com/sorting-months-according-to-fiscal-year-tp4723409p4723409.ht...
Sent from the PostgreSQL - sql mailing list archive at Nabble.com.
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: sorting months according to fiscal year
2011-08-22 13:27 sorting months according to fiscal year Enzen user <anushka.achaiah@enzentech.com>
@ 2011-08-22 13:39 ` Pavel Stehule <pavel.stehule@gmail.com>
1 sibling, 0 replies; 3+ messages in thread
From: Pavel Stehule @ 2011-08-22 13:39 UTC (permalink / raw)
To: Enzen user <anushka.achaiah@enzentech.com>; +Cc: pgsql-sql
Hello
2011/8/22 Enzen user <anushka.achaiah@enzentech.com>:
> Hi
> I have to rearrange the months according to the fiscal year i.e from April
> to march and use the same in the order by clause of a query.
> I have written the following postgresql function for the same, but to_number
> is returning an error.
> Can you please tell me where i'm going wrong?
> Instead of the function to_number can you suggest any other function that
> will convert a particular month to its corresponding month number(ex:
> april=4 or jan=1)
>
>
> CREATE FUNCTION sort_month(to_number('April','MM')) RETURNS numeric AS $$
you cannot use to_number function inside param's list
> DECLARE
>
> BEGIN
>
> CASE WHEN 4 THEN 1
> WHEN 5 THEN 2
> WHEN 6 THEN 3
> WHEN 7 THEN 4
> WHEN 8 THEN 5
> WHEN 9 THEN 6
> WHEN 10 THEN 7
> WHEN 11 THEN 8
> WHEN 12 THEN 9
> WHEN 1 THEN 10
> WHEN 2 THEN 11
> WHEN 3 THEN 12
> ELSE 0
> END;
>
>
>
> $$ LANGUAGE plpgsql;
>
CREATE OR REPLACE FUNCTION sort_month(int)
RETURNS int -- is wrong to use numeric here
AS $$
...
$$ LANGUAGE sql;
SELECT sort_ month(to_nuber(...))
Regards
Pavel Stehule
>
>
> --
> View this message in context: http://postgresql.1045698.n5.nabble.com/sorting-months-according-to-fiscal-year-tp4723409p4723409.ht...
> Sent from the PostgreSQL - sql mailing list archive at Nabble.com.
>
> --
> Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-sql
>
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: sorting months according to fiscal year
2011-08-22 13:27 sorting months according to fiscal year Enzen user <anushka.achaiah@enzentech.com>
@ 2011-08-22 23:58 ` Gavin Flower <GavinFlower@archidevsys.co.nz>
1 sibling, 0 replies; 3+ messages in thread
From: Gavin Flower @ 2011-08-22 23:58 UTC (permalink / raw)
To: Enzen user <anushka.achaiah@enzentech.com>; +Cc: pgsql-sql
On 23/08/11 01:27, Enzen user wrote:
> Hi
> I have to rearrange the months according to the fiscal year i.e from April
> to march and use the same in the order by clause of a query.
> I have written the following postgresql function for the same, but to_number
> is returning an error.
> Can you please tell me where i'm going wrong?
> Instead of the function to_number can you suggest any other function that
> will convert a particular month to its corresponding month number(ex:
> april=4 or jan=1)
>
>
> CREATE FUNCTION sort_month(to_number('April','MM')) RETURNS numeric AS $$
> DECLARE
>
> BEGIN
>
> CASE WHEN 4 THEN 1
> WHEN 5 THEN 2
> WHEN 6 THEN 3
> WHEN 7 THEN 4
> WHEN 8 THEN 5
> WHEN 9 THEN 6
> WHEN 10 THEN 7
> WHEN 11 THEN 8
> WHEN 12 THEN 9
> WHEN 1 THEN 10
> WHEN 2 THEN 11
> WHEN 3 THEN 12
> ELSE 0
> END;
>
>
>
> $$ LANGUAGE plpgsql;
>
>
>
> --
> View this message in context: http://postgresql.1045698.n5.nabble.com/sorting-months-according-to-fiscal-year-tp4723409p4723409.ht...
> Sent from the PostgreSQL - sql mailing list archive at Nabble.com.
>
You might find the following faster...
DROP FUNCTION IF EXISTS
sort_mont
(
to_number int
) ;
CREATE FUNCTION
sort_mont
(
to_number int
)
RETURNS numeric
LANGUAGE plpgsql
AS
$$
BEGIN
RETURN 1 + (to_number + 8) % 12;
END;
$$;
SELECT sort_mont(1);
SELECT sort_mont(12);
/// output..
gavin=> \i modulus_stored_proc.sql
DROP FUNCTION
CREATE FUNCTION
sort_mont
-----------
10
(1 row)
sort_mont
-----------
9
(1 row)
gavin=>
^ permalink raw reply [nested|flat] 3+ messages in thread
end of thread, other threads:[~2011-08-22 23:58 UTC | newest]
Thread overview: 3+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2011-08-22 13:27 sorting months according to fiscal year Enzen user <anushka.achaiah@enzentech.com>
2011-08-22 13:39 ` Pavel Stehule <pavel.stehule@gmail.com>
2011-08-22 23:58 ` Gavin Flower <GavinFlower@archidevsys.co.nz>
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox