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About Bitmap Index [message #268980]

Thu, 20 September 2007 05:48

bagulia_pilla
Messages: 25
Registered: July 2006

Junior Member

I have one table which is the parition table. The table always updated and inserted. We have created Bitmap index for this table

It is true that ...

Bitmap indexes are not appropriate for tables that have lots of single row DML operations.. especially, concurrent single row DML operations..

Our DBA is saying why we need to drop bitmap Index.

Please help me

thanks

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Re: About Bitmap Index [message #268985 is a reply to message #268980]

Thu, 20 September 2007 06:19

Michel Cadot
Messages: 68729
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

Quote:

Please help me

Help you to what?
You have the answer: either bitmap index either DML but not both.

Regards
Michel

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Re: About Bitmap Index [message #268987 is a reply to message #268980]

Thu, 20 September 2007 06:23

bagulia_pilla
Messages: 25
Registered: July 2006

Junior Member

Hi
That means,we need to drop Bitmap Index..

...since there is lot of row DML operations..

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Re: About Bitmap Index [message #268988 is a reply to message #268980]

Thu, 20 September 2007 06:26

muzahid
Messages: 281
Registered: September 2004
Location: Dhaka, Bangladesh

Senior Member

read the document
http://www.akadia.com/services/ora_bitmapped_index.html

Another good documentation
http://www.oracle.com/technology/pub/articles/sharma_indexes.html

[Updated on: Thu, 20 September 2007 06:29]

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Re: About Bitmap Index [message #268999 is a reply to message #268987]

Thu, 20 September 2007 07:07

Michel Cadot
Messages: 68729
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

Quote:

That means,we need to drop Bitmap Index..

...since there is lot of row DML operations..

Yes.

Regards
Michel

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Re: About Bitmap Index [message #269176 is a reply to message #268987]

Thu, 20 September 2007 23:20

bagulia_pilla
Messages: 25
Registered: July 2006

Junior Member

Thank You so much,, I got it from the example..
Laughing

Laughing

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