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Re: Removing NOT NULL constraint takes a long time. Why?
Posted by: Ben Dowling
Date: November 03, 2009 09:58AM

Hi Rick,

The manual says changes can be made immediately if the change is only to the table's metadata. I had assumed that the NOT NULL constraint would be part of the metadata, so I guess my question should really have been "Why can't the NOT NULL constraint for a column stored as part of a table's metadata?"

Thanks, Ben

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