Database Administration (MOSC)

MOSC Banner

DBMS_REDEFINITION to drop a column: will it be faster than the DROP statement

edited Jan 22, 2014 11:28PM in Database Administration (MOSC) 3 commentsAnswered ✓
Hi all,

On a 24/7 system with limited maintanance-windows (so not _really_ 24/7 we have 5 tables in which columns have to be dropped. The tables are large, tens of millions of rows. A drop column statement took more than one hour, while the accepted outage is no more than 25 minutes.

I haven't tried yet, but was wondering if someone knows: will redefining the table with DBMS_REDEFINTION be faster than the DROP COLUMN statement?

Kind regards,

Ronald

Howdy, Stranger!

Log In

To view full details, sign in to My Oracle Support Community.

Register

Don't have a My Oracle Support Community account? Click here to get started.

Category Leaderboard

Top contributors this month

Instructions for posting

×

1. Select a discussion category from the picklist.


2. Enter a title that clearly identifies the subject of your question.


3. In the body, insert detailed information, including Oracle product and version.


Please abide by the Oracle Community guidelines and refrain from posting any customer or personally identifiable information (PI/CI).


Cloud / Fusion customers - Our Cloud community has moved! Please go to Cloud Customer Connect .


New to My Oracle Support Community? Visit our Welcome Center

MOSC Help Center