Oracle-L: RE: Rman ... what do YOU need

From: Deshpande, Kirti <kirti.deshpande_at_verizon.com>
Date: Tue, 09 Apr 2002 10:40:39 -0800
Message-ID: <F001.0043FBC3.20020409104039@fatcity.com>

FWIW --
Oracle Press recently published a "Backup & Recovery 101" book by Kenny Smith and Stephan Haisley.
I have not yet read it, but it claims to have RMAN coverage. Since it is part of the '101' series, I presume it covers most of the basic stuff.
Has anyone purchased it? And read it?
I may check it out at IOUG-A next week :)

Regards,

Kirti

-----Original Message-----
Sent: Tuesday, April 09, 2002 12:54 PM
To: Multiple recipients of list ORACLE-L

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
> --
> Author:
> INET: Cherie_Machler_at_gelco.com
>
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Author: Freeman, Robert 
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Author: Deshpande, Kirti
  INET: kirti.deshpande_at_verizon.com

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Received on Tue Apr 09 2002 - 13:40:39 CDT