ALTER OPERATOR <> (md5hash, md5hash) SET (RESTRICT = neqsel, JOIN = neqjoinsel);
ALTER OPERATOR > (md5hash, md5hash) SET (RESTRICT = scalargtsel, JOIN = scalargtjoinsel);
ALTER OPERATOR < (md5hash, md5hash) SET (RESTRICT = scalarltsel, JOIN = scalarltjoinsel);
ALTER OPERATOR >= (md5hash, md5hash) SET (RESTRICT = scalargtsel, JOIN = scalargtjoinsel);
ALTER OPERATOR <= (md5hash, md5hash) SET (RESTRICT = scalarltsel, JOIN = scalarltjoinsel);
ALTER OPERATOR = (md5hash, md5hash) SET (RESTRICT = eqsel, JOIN = eqjoinsel);