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Message Posted: Sun, 29 May 2011 @ 18:09:49 GMT

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Subj:   Re: Multi value compression and presence bits
From:   Christian Schiefer, makeITdone


with 50 states you will need 6 presence bits in each column since 2^5-1 <= 50 <= 2^6-1 and all your states will be compressed.

With your local country compression ( only one value ) you will need 1 presence bit. You will need 2 bytes for the other 50% of states.

It depends on the table definition, how the alignment of the row header looks like .... just give it a try on sample data and then compare currentperm of the tables.


D.I. Christian Schiefer

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