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Question and Answer

Connor McDonald

Thanks for the question, RUTHENDAR.

Asked: January 07, 2017 - 9:40 am UTC

Last updated: January 08, 2017 - 11:48 am UTC

Version: 11.2.0.2.0

Viewed 1000+ times

You Asked

A Select query is using Full table Scan. The execution time takes much long. How to force the query to use index scan option.

and Connor said...

You can use a hint for that, eg

select /*+ INDEX(t (index_col)) */ ...
from my_table t

but before you do that - you should be looking at *why* the optimizer has decided to do that. Better to research that first, eg out of date or incorrect stats, insufficient or incorrect histograms etc.



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