Archives of the TeradataForum
Message Posted: Tue, 19 Mar 2002 @ 13:59:16 GMT
| Subj: || || Re: ALTER TABLE Question |
| From: || || James A. Judge |
If this is the only option then it depends on the configuration; (i.e. model type, number of nodes, number of vamps, number of columns,
number of rows, rows per block). You will have to update every row header/and/or row depending on whether the column is NULLable or not, or
you have a default value you are inserting and could specify COMPRESS on that value, etc.. It is a single unit of work that locks the table
until completion so you have to weigh the cost of table unavailability and error recovery time against other options.