The following hash index is distributed explicitly on l_shipdate and stored implicitly in value order on l_orderkey, the primary index for the base table lineitem:
CREATE HASH INDEX line_hidx_6 (l_shipdate) ON lineitem BY (l_shipdate) ORDER BY VALUES;
Note that the ordering column of the base table complies with the rules that it be limited to a single numeric column four or fewer bytes in length.
This creates an index that is equivalent in structure to the following join index:
CREATE JOIN INDEX line_jidx_6 AS SELECT (l_orderkey), (l_shipdate, lineitem.ROWID) FROM lineitem ORDER BY l_orderkey PRIMARY INDEX (l_shipdate);