Wrong SqlType for boolean columns

Hello everyone,

i found out that my postgres driver maps a boolean column to the sqlType -7, wich is java.sql.Types.BIT and not
java.sql.Types.Boolean(Boolean is 16). This is a very strange behavior.  

I think this is a bug within the jdbc-driver.

link to JavaDoc:
http://java.sun.com/javase/6/docs/api/constant-values.html#java.sql.Types.BOOLEAN

the code i used to test this:

//returns a connection to the database
Connection con = ConnectionManager.getConnection();
PreparedStatement prep = con.prepareStatement("select isboolean from test");
ResultSet rs = prep.executeQuery();
ResultSetMetaData rsmd = rs.getMetaData();
System.out.println(rsmd.getColumnType(1));
System.out.println(rsmd.getColumnTypeName(1));
rs.close();
prep.close();
con.close();

definition of table:
CREATE TABLE test
(
  id serial NOT NULL,
  "name" character varying NOT NULL DEFAULT ''::character varying,
  "number" integer DEFAULT 1,
  date date DEFAULT now(),
  isboolean boolean DEFAULT true,
  CONSTRAINT test_pkey PRIMARY KEY (id)
)

the output of this program is:
-7
bool

but it should be:
16
bool

I tested this with:
postgresql-8.3-605.jdbc3.jar
postgresql-8.4-701.jdbc3.jar
postgresql-8.4-701.jdbc4.jar

Server is PostgreSQL 8.4.4 on x86_64-pc-linux-gnu by gcc4-4.real (Ubuntu)...

Im using java-sdk 6.

greetings
Michael
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