Re: Partitioning by first digit of VARCHAR column data
- From: Connor McDonald <hamcdc@xxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Fri, 27 Aug 2004 03:50:31 +0100 (BST)
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
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