Sort and index

Hi,

I thought that an index can be used for sorting.
I'm a little confused about the following result:

create index OperationsName on Operations(cOperationName);
explain SELECT * FROM Operations ORDER BY cOperationName;
                              QUERY PLAN
-----------------------------------------------------------------------
 Sort  (cost=185.37..189.20 rows=1532 width=498)
   Sort Key: coperationname
   ->  Seq Scan on operations  (cost=0.00..104.32 rows=1532 width=498)
(3 rows)

Is this supposed to be so?

Andrei


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