How can I determine the maximum row size just from the column datatype sizes?

Posted by thecoop on Stack Overflow See other posts from Stack Overflow or by thecoop
Published on 2010-03-25T13:36:55Z Indexed on 2010/03/25 16:03 UTC
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Oracle

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table

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index

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row-size

How can I work out the maximum row size in a table, if I'm only given the datatype lengths (from all_tab_cols.data_length column) of the columns in the table (ie no statistics or ANALYZE)? There's extra complications in that this is an IOT, so there's index tree size to consider as well.

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