After the import index rebuild...

My colleague and I are discussing is necessary or advisable, to rebuild the index after a schema import.

My thought is that the index data are implemented cost blocks thus creating a tree of very flat index without any fragmentation.
But my colleague suspect that perhaps the blocks are built exactly as they existed in the source database.

I could perhaps understand if the update was performed using RMAN that copies the block by block, but even in this case, I'm not sure.

You can help us understand this please?

Thank you.

Ed

In my view, all indexes of normal type are created 'new' as part of the import process.
This would include the B-tree, bitmap, based on a function, etc.

Tags: Database

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