From: Justin Graf <justin@magwerks.com>
To: Ignacio Balcarce <ignacio.balcarce@vivatia.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: MSSQL to PostgreSQL - Issue trying to generate unique ID using actual date
Date: Thu, 18 Mar 2010 12:02:04 -0500
Message-ID: <4BA25C8C.10305@magwerks.com> (raw)
In-Reply-To: <000001cac5e1$8851dbe0$98f593a0$@balcarce@vivatia.com>
References: <000001cac5e1$8851dbe0$98f593a0$@balcarce@vivatia.com>
On 3/17/2010 9:52 AM, Ignacio Balcarce wrote:
>
> Hi all,
>
> I am facing a problem trying to convert from MSSQL procedure to
> PostgreSQL function.
>
> CREATE PROCEDURE dbo.THUBAN_SP_GENERATEID
>
> @NEWID VARCHAR(20) OUTPUT
>
> AS
>
> SET @NEWID = (
>
> SELECT REPLACE(SUBSTRING(CONVERT(CHAR(10),GETDATE(),20 ),1,10),'-','')
>
> + CAST(REPLICATE(0,8-LEN (ISNULL(CAST(SUBSTRING(MAX(SEQ_ID),9,8) AS
>
> INTEGER),0) + 1)) AS VARCHAR)
>
> + CAST(ISNULL(CAST(SUBSTRING(MAX(SEQ_ID),9,8) AS INTEGER),0) + 1 AS
>
> VARCHAR)
>
> FROM THUBAN_SEQ
>
> WHERE SUBSTRING(SEQ_ID,1,8)=
>
> REPLACE(SUBSTRING(CONVERT(CHAR(10),GETDATE(),20 ),1,10),'-','')
>
> )
>
> INSERT INTO THUBAN_SEQ VALUES (@NEWID)
>
> SELECT @NEWID AS ITEM_ID;
>
> GO
>
I surprised this works in MSSQL
CREATE SEQUENCE THUBAN_SEQ
INCREMENT 1
MINVALUE 1
MAXVALUE 9223372036854775807
START 1
CACHE 1;
Now for the function to generate the ID with the date leading
CREATE OR REPLACE FUNCTION THUBAN_SP_GENERATEID()
RETURNS VARCHAR
AS $$
BEGIN
--now we get the next value from the thuban_seq and add the date to the
front.
return to_char( current_timestamp, 'MMDDYYYY')::varchar ||
nextval('THUBAN_SEQ')::varchar
RETURN NEWID;
END;
$$ LANGUAGE plpgsql;
If this is not what your after you need to give more information what
you want to accomplish
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To: pgsql-sql@postgresql.org
Cc: justin@magwerks.com, ignacio.balcarce@vivatia.com
Subject: Re: MSSQL to PostgreSQL - Issue trying to generate unique ID using actual date
In-Reply-To: <4BA25C8C.10305@magwerks.com>
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