Archives of the TeradataForum
Message Posted: Tue, 22 Apr 2003 @ 17:34:53 GMT
| 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.