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Message Posted: Tue, 22 Apr 2003 @ 17:34:53 GMT


     
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Subj:   Re: Is it possible to modify table?
 
From:   Walter, Todd A

Alter of an attribute in place only is allowed when the data layout does not have to change. Thus adding digits to -some- decimals will work but changing decimal precision will not. Changing max char var will work but changing fixed char length will not.

Another option for a very large table that is costly in space to copy is to alter adding a new column, update to set the new column value to the old, then alter dropping the old column. This will trade time/cost/complexity for space utilization. Insert select is faster and simpler but requires a lot of space for a large table.



     
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