[PERFORM] Using LIKE expression problem..

[Michael Ryan S. Puncia]

Hi everybody..          Before anything else I would like to thank all those person who answers my previous question… again thank you very much   This is my question …          In my query .. Select * from table1 where lastname LIKE  ‘PUNCIA%’..   In the query plan ..it uses seq scan rather than index scan .. why ? I have index on lastname, firtname…     Thanks