Rman ... what do YOU need

From: Freeman, Robert <Robert_Freeman_at_csx.com>
Date: Tue, 09 Apr 2002 09:53:37 -0800
Message-ID: <F001.0043FAB4.20020409095337@fatcity.com>

I'm contemplating doing an Rman backup and recovery handbook. I'm wondering what you would like to see in such a book and would you use such a book? Ideas and comments welcome.

Robert G. Freeman - Oracle8i OCP
Oracle DBA Technical Lead
CSX Midtier Database Administration

The Cigarette Smoking Man: Anyone who can appease a man's conscience can take his freedom away from him.

-----Original Message-----
Sent: Monday, April 08, 2002 2:54 PM
To: Multiple recipients of list ORACLE-L

I don't think you can do it.. I mean, you could change it to trunc the oracle_date field (that eliminates the minutes) and then do a to_date of :b1 but you will still be operating on the oracle_date field.

Okay, I HATE to suggest this, but since the table is small:

add another field to the table oracle_date_2 as a date field. Update the table set oracle_date_2=trunc(oracle_date)

add a trigger to fill in oracle_date_2 when you insert a row or update the oracle_date column

create an index on oracle_date_2 and change the query to use that column

• Cherie_Machler_at_gelco.com wrote:
  >
  > I've got the following SQL statement that is running very long on a
  > nightly
  > data load. The problem is the TO_CHAR function which is preventing
  > me from using the index on this small (20,000-row table).
  >
  > This is an 8.0.4 database so it is not possible for me to use
  > make this a function-based index.
  >
  > The problem is that the date field has minutes, etc. included and
  > those need to be eliminated before the comparison can be made.
  > That's why I can't just eliminate the TO_CHAR from both sides
  > of the equation.
  >
  > Isn't there a way that I can pull this function out of the select
  > statement
  > and do it in a preceeding statement? Then I could just pass in both
  > variables to this statement without the TO_CHAR and use my index.
  >
  > Is this realistic? How, exactly could it be done?
  >
  >
  > SELECT DATE_KEY
  > FROM DATE_DIM
  > WHERE TO_CHAR(ORACLE_DATE,'DD-MON-YYYY') =
  > TO_CHAR(:b1,'DD-MON-YYYY')
  >
  >
  > SQL> desc date_dim;
  > Name Null? Type
  > ------------------------------- -------- ----
  > DATE_KEY NOT NULL NUMBER(5)
  > ORACLE_DATE NOT NULL DATE
  > DATACOM_DATE NUMBER(6)
  > DATACOM_REVERSE_DATE NUMBER(6)
  > DAY_OF_WEEK NOT NULL VARCHAR2(30)
  > DAY_NUMBER_IN_MONTH NOT NULL NUMBER(3)
  > DAY_NUMBER_OVERALL NOT NULL NUMBER(9)
  > WEEK_NUMBER_IN_YEAR NOT NULL NUMBER(3)
  > WEEK_NUMBER_OVERALL NOT NULL NUMBER(7)
  > MONTH NOT NULL VARCHAR2(30)
  > MONTH_NUMBER_OVERALL NOT NULL NUMBER(7)
  > YEAR NOT NULL NUMBER(5)
  > WEEKDAY_IND NOT NULL CHAR(1)
  > LAST_DAY_IN_MONTH_IND NOT NULL CHAR(1)
  > DATA_WAREHOUSE_MOD_DATETIME NOT NULL DATE
  > DATA_MART_MOD_DATETIME NOT NULL DATE
  >
  >
  >
  > SQL> select oracle_date from date_dim where rownum=1;
  >
  > ORACLE_DA
  > ---------
  > 01-JAN-70
  >
  >
  > Thanks in advance for any help.
  >
  > Cherie Machler
  > Oracle DBA
  > Gelco Information Network
  >
  >
  >
  >
  >
  >
  >
  > --
  > Please see the official ORACLE-L FAQ: http://www.orafaq.com
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  > Author:
  > INET: Cherie_Machler_at_gelco.com
  >
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Author: Freeman, Robert 
  INET: Robert_Freeman_at_csx.com

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Received on Tue Apr 09 2002 - 12:53:37 CDT