Operator Class for Hash

Hi All,

Could someone please help me out with an example on how to define an
operator and operator class that supports hash joins? I've tried to
follow the instructions in the documentation for v8.1 but I'm obviously
doing something wrong, because the engine crashes on an operation that
tries to use the operator.

Here is what I have:

CREATE OPERATOR < (leftarg = mytype, rightarg = mytype, procedure =
mytype_lt, commutator = >, negator = >=, restrict = scalarltsel, join =
scalarltjoinsel, HASHES);

CREATE OPERATOR <= (leftarg = mytype, rightarg = mytype, procedure =
mytype_le, commutator = >=, negator = >, restrict = scalarltsel, join =
scalarltjoinsel, HASHES, sort1 = <, sort2 = <);

CREATE OPERATOR = (leftarg = mytype, rightarg = mytype, procedure =
mytype_eq, commutator = =, negator = <>, restrict = eqsel, join =
eqjoinsel, HASHES, sort1 = <, sort2 = <);

CREATE OPERATOR >= (leftarg = mytype, rightarg = mytype, procedure =
mytype_ge, commutator = <=, negator = <, restrict = scalargtsel, join =
scalargtjoinsel, HASHES, sort1 = <, sort2 = <);

CREATE OPERATOR > (leftarg = mytype, rightarg = mytype, procedure =
mytype_gt, commutator = <, negator = <=, restrict = scalargtsel, join =
scalargtjoinsel, HASHES, sort1 = <, sort2 = <);

CREATE OPERATOR <> (leftarg = mytype, rightarg = mytype, procedure =
mytype_ne, commutator = <>, negator = =, restrict = neqsel, join =
neqjoinsel, HASHES, sort1 = <, sort2 = <);

CREATE OPERATOR CLASS mytype_ops DEFAULT FOR TYPE mytype USING btree AS

OPERATOR 1 <,

OPERATOR 2 <=,

OPERATOR 3 =,

OPERATOR 4 >=,

OPERATOR 5 >,

FUNCTION 1 mytype_comp(mytype, mytype);

CREATE OPERATOR CLASS mytype_ops DEFAULT FOR TYPE mytype USING hash AS

OPERATOR 1 =,

FUNCTION 1 mytype_comp(mytype, mytype);

Thank you for the help!