Oracle-L: Re: archiving data

From: Arup Nanda <orarup_at_hotmail.com>
Date: Fri, 30 May 2003 16:49:42 -0800
Message-ID: <F001.005A75AF.20030530164942@fatcity.com>

For situations like this you have the COPY command of SQL*Plus.

Remember, it's a SQL*Plus comamnd like set, btitle, etc. not a sql command you can embed inside a pl/sql block. You could create a table similar in structure to main table and then polulate the data

SQL> SET LONG 999999
-- this is neededto set the max size of the long data; otherwise it gets truncated.

COPY FROM SCHEMA_NAME/PASSWORD_at_CONNECTSTRING - APPEND HOLDINGTABLE -
USING SELECT * FROM MAINTABLE WHERE DATE_COL < SYSDATE - 12*30

Note the use of hyphens after the lines. SQL*PLus commands are expected to be in one line. Since I am continuing on to the next, I used the continuation character hyphen.

This by default commits after all the rows are loaded. You can control the commit frequency by specifying two parameters

sets 100 records per array SET ARRAYSIZE 100
sets a commit to occur after every 200 batches, or 20,000 records SET COPYCOMMIT 200

This process is fairly simple and can be easily automated using a shell script. Any error raised by the sql block can be checked.

Hope this helps.

Arup Nanda
www.proligence.com

Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Friday, May 30, 2003 7:04 PM

> hi there is this project that is going on for
> archiving old data from oltp system that is older than
> 12 months and then purging them in the main db.
>
> the tables that are to be archived are with long rows.
> they cannot be converted to lobs since this is a third
> party application. here is where the problem lies.
> oracle support when contacted says either mv to lobs
> to make this move easier or use oci ..blah.blah.. to
> get this working if you want to remain in longs.
>
> there are some options i have though about:
> 1. export /import ..but should make this highly
> automated since the main db and archival db will be on
> different hosts, this will not be monitored and import
> has to go thru w/o issues etc.
> 2. create snapshot - but they dont work with
> long..hence not an option.
> 3. getting sqlldr to work but i think it has that 32k
> column size limitation.
>
>
> so can you please suggest me whetehr there is
> something else i can do or option 1 is the best given
> the environment. the oracle is 8.1.7.2 on sun 2.8.
>
> thanks
> sai
> --
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> Author: Sai Selvaganesan
> INET: ssaisundar_at_sbcglobal.net
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Arup Nanda
  INET: orarup_at_hotmail.com

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
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Received on Fri May 30 2003 - 19:49:42 CDT