Archives of the TeradataForum

Message Posted: Thu, 10 Jun 2004 @ 16:26:52 GMT

	<Prev	Next>		<<First	<Prev	Next>	Last>>

The default row header has 7 presence bits available for NULL and value compression. In this case, 2 of the 7 are used. So the presence bits don't actually change the size of the table in this case. Presence bytes are added as needed depending on the number of columns and values compressed, changing the size of the table.

Mark Morris
TD Architecture

	<Prev	Next>		<<First	<Prev	Next>	Last>>