LIKE with no wildcards problem

When doing a select with a LIKE in the where clause,
I always get 0 rows if I do not use a wildcard [_%].
LIKE should act like = in this case (and the docs say so).
A select without a from correctly returns 't'.
I am using PostgreSQL 7.1.3 on Solaris.

What am I missing?
Should I ask pgsql-sql?

Thanks,

John Allison
john(at)joss(dot)ucar(dot)edu

catalog^> create table foo ( bar char(8) )
CREATE

catalog^> insert into foo values ( 'abc' )
INSERT 38413 1

catalog^> insert into foo values ( '2.20' )
INSERT 38414 1

catalog^> select * from foo
bar
----------
abc
2.20
(2 rows)

catalog^> select * from foo where bar like 'abc'
bar
-----
(0 rows)

catalog^> select * from foo where bar like 'abc%'
bar
----------
abc
(1 row)

catalog^> select 'abc' like 'abc'
?column?
----------
t
(1 row)