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Using First_rows hints change the sql plan

Kok AikJan 20 2009 — edited Jan 22 2009
Dear All,

I have a query with a first_rows hint and this causing it to used sub-optimal plan by choosing the wrong indexes.
Besides, its applied a conversion function to the where clause condition compared if the case if it is using the right plan.

Appreciate if you can throw some light on using the first_rows hint

Thanks

Rgds
Ung
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Locked on Feb 19 2009
Added on Jan 20 2009
#general-database-discussions
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