Re: basic compression

On Thursday, January 15, 2015 at 12:58:56 PM UTC-8, geos wrote:
> initally a table was created with basic compression and loaded using
> direct load insert. during table usage time there were performed some
> updates, some non-direct load inserts, deletions etc. so after a while a
> table is composed of compressed and uncompressed blocks living altogether.
>
> do you know if is it possible to tell whether a particular block is
> stored in compressed or uncompressed form when using basic compression
> for a table? is this information available at the block level with the
> help of some oracle system functions that operate on blocks?
>
> thank you
> geos

I wouldn't know, but there might be some clues in Jonathan's series: http://allthingsoracle.com/compression-oracle-basic-table-compression/

jg

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