RE: Partitioning by first digit of VARCHAR column data
- From: Surendra.Tirumala@xxxxxx
- To: oracle-l@xxxxxxxxxxxxx
- Date: Fri, 27 Aug 2004 07:46:07 -0400
Thank you Connor!!
We have just decided to go for range on year and hash on varchar2.
Thanks again.
Surendra
-----Original Message-----
From: Connor McDonald [mailto:hamcdc@xxxxxxxxxxx]
Sent: Thursday, August 26, 2004 10:51 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: Partitioning by first digit of VARCHAR column data
Bang a trigger on to populate a new column and partition on that.
Alternatively, use dbms_utility.get_hash_value to see how your varchar2 map
out across 4
partitions. You might be able to get away with just a range on year and
hash on varchar2.
Connor
--- Surendra.Tirumala@xxxxxx wrote:
> Hi,
>
> I have a table with several columns which include a NUMBER(year) and a
> VARCHAR(some code) columns. The VARCHAR column has values that start with
> either 1 or 2 or 3 or 4. I would like to have composite range partition
key
> based on YEAR and the first digit of the VARCHAR column. Is there any way
I
> can accomplish this? Can I use some function like SUBSTR to partition the
> table based on first digit of VARCHAR column data?
>
> Thanks for your help.
> Surendra
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=====
Connor McDonald
Co-author: "Mastering Oracle PL/SQL - Practical Solutions"
ISBN: 1590592174
web: http://www.oracledba.co.uk
web: http://www.oaktable.net
email: connor_mcdonald@xxxxxxxxx
Coming Soon! "Oracle Insight - Tales of the OakTable"
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