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Archives of the TeradataForumMessage Posted: Tue, 02 Mar 2004 @ 18:48:32 GMT
All, I'm totally confused with the terminology that's been used in documentation to calculate the efficiency of compression . 1)table_header_space = no:amps * sum(field_size-col) where field_size-col is no:of table header bytes used by the compressed column + 1 What is this "table header bytes used by compressed column " , where can I get this info ? , is this same as column length 2) row_header_space = table_cardinality * (presence_octets -1) how to calculate "presence octets" ? where can I get this info ? Any help with example would be highly appreciated Thanks, Rick
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