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Message Posted: Mon, 10 Jun 2002 @ 19:16:32 GMT


     
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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



     
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