Using index for substring search - Mailing list pgsql-general

Is it possible for postgreSQL 7.2 to use index search for the following
queries:

select name from item where substring(itemcode,1,3) = '101';
select name from item where itemcode like '101%';

if I have an index on itemcode.

Version 6.5.3 can use index search for the first query.

Thanks,
Thomas.