Oracle-L: RE: Is range partitioning possible on part of varchar2 column ???

From: Janardhana Babu Donga <jbdonga_at_ucdavis.edu>
Date: Fri, 14 Mar 2003 09:29:10 -0800
Message-ID: <F001.0056A553.20030314092910@fatcity.com>

This seems to be a good idea. I will see if this is acceptable to my people. Earliar I suggested to change to date field, and was not acceptable for them as there seems plenty of code needs to be changed. I will see if this change is acceptable for them.

One thing I could understand clearly from the LIST MEMBERS is that it is not at all possible to range partition without changing the column type/contents. I have two options now, one with what you suggested.

Thanks for your help and thanks for all those who replied.

Babu

-----Original Message-----
Sent: Thursday, March 13, 2003 8:34 PM
To: Multiple recipients of list ORACLE-L ???

Babu,

On a slightly different approach, is it possible to update the column to the format YYYYMON, from the present MONYYYY? If so, then there is hope. You could create the partitions like this

PARTITIONING BY RANGE (REPORT_CYCLE_CD)
(

PARTITION P1998 VALUES LESS THAN ('1999%'),
PARTITION P1999 VALUES LESS THAN ('2000%'),
PARTITION P2000 VALUES LESS THAN ('2001%'),

.........
PARTITION PMAX VALUES LESS THAN (maxvalue) )

Hope this helps.

Arup Nanda

Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Thursday, March 13, 2003 5:19 PM

> Babu
> I don't think partitions are clearly documented anywhere. Here is some SQL
> that works so you can see how to use a date function. It partitions on two
> columns, but I wanted you to see something that works.

>


>    add partition sum_fy_28

>         values less than ('FY', to_date('02012003','mmddyyyy'))

>         tablespace data_fy_28

>

> -----Original Message-----
> Sent: Thursday, March 13, 2003 3:14 PM
> To: Multiple recipients of list ORACLE-L
> ??????

>
>

> Dear List,

> I have a table of size approx 10gig, and I need to partition based on the
> YEAR. I have column in the table, REPORT_CYCLE_CD with VARCHAR2(7). The
> data in the column of format "MONYYYY" . I need to partition the table
based
> on the year YYYY, that is, substr(report_cycle_cd, 4,4).
>
> Substr function doesn't seem to be permitted in the partitioning syntax
and
> so am getting errors. Only TO_DATE function seems to be permitted. Since
it
> is not a date column, I would like to know if there is a way to RANGE
> partition the table, instead of HASH partitioning.

> Appreciate any suggestions.

> Thanks,
> -- Babu
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.net
> --
> Author: Janardhana Babu Donga
> INET: jbdonga_at_ucdavis.edu

>


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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Arup Nanda
  INET: orarup_at_hotmail.com

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-- 
Author: Janardhana Babu Donga
  INET: jbdonga_at_ucdavis.edu

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Received on Fri Mar 14 2003 - 11:29:10 CST