|
|
Archives of the TeradataForum
Message Posted: Mon, 10 Jun 2002 @ 19:16:32 GMT
Subj: | | Full-Table Scans and Secondary Indexes |
|
From: | | Claybourne Barrineau |
All,
Suppose I have 2 tables which consist of the same records. Table A has no secondary indexes. Table B has 1 or more secondary indexes.
It is my understanding that a full-table scan of table A would be faster than a full-table scan of table B (because Table A requires less
diskspace.)
Why should the existence of secondary index sub-tables factor into the amount of time it takes to scan a dataset?
Thanks,
Claybourne Barrineau
| |