select data from a partition

[infdeveloper]

Hello every one,

We have a hash partitioned table partitioned on columna and each partiton holds only 1 value

ex: p1=x
p2=y

My question is would there be a difference in performance if table is acessed

select * from table a partition(p1)
vs
select * from table a columna=x

It would be great if some one could give me the performance in this cases

Thanks