interesting difference for queries...

I noticed an interesting difference in query behaviour:

cms=# CREATE TABLE foo(bar int);
CREATE
cms=# SELECT * from foo where bar=1.7;
bar
-----
(0 rows)

cms=# SELECT * from foo where bar='1.7';
ERROR: pg_atoi: error in "1.7": can't parse ".7"

Is this the same problem as index usage with/without quotes? However, one
would expect the same output from both queries, either the error message, or
better the 0 rows result.

Regards
Mario Weilguni