text: --
  -- INET
  --
  
  -- prepare the table...
  
  DROP TABLE INET_TBL;
  CREATE TABLE INET_TBL (c cidr, i inet);
  INSERT INTO INET_TBL (c, i) VALUES ('192.168.1', '192.168.1.226/24');
  INSERT INTO INET_TBL (c, i) VALUES ('192.168.1.0/26', '192.168.1.226');
  INSERT INTO INET_TBL (c, i) VALUES ('192.168.1', '192.168.1.0/24');
  INSERT INTO INET_TBL (c, i) VALUES ('192.168.1', '192.168.1.0/25');
  INSERT INTO INET_TBL (c, i) VALUES ('192.168.1', '192.168.1.255/24');
  INSERT INTO INET_TBL (c, i) VALUES ('192.168.1', '192.168.1.255/25');
  INSERT INTO INET_TBL (c, i) VALUES ('10', '10.1.2.3/8');
  INSERT INTO INET_TBL (c, i) VALUES ('10.0.0.0', '10.1.2.3/8');
  INSERT INTO INET_TBL (c, i) VALUES ('10.1.2.3', '10.1.2.3/32');
  INSERT INTO INET_TBL (c, i) VALUES ('10.1.2', '10.1.2.3/24');
  INSERT INTO INET_TBL (c, i) VALUES ('10.1', '10.1.2.3/16');
  INSERT INTO INET_TBL (c, i) VALUES ('10', '10.1.2.3/8');
  INSERT INTO INET_TBL (c, i) VALUES ('10', '11.1.2.3/8');
  INSERT INTO INET_TBL (c, i) VALUES ('10', '9.1.2.3/8');
  INSERT INTO INET_TBL (c, i) VALUES ('10:23::f1', '10:23::f1/64');
  INSERT INTO INET_TBL (c, i) VALUES ('10:23::8000/113', '10:23::ffff');
  INSERT INTO INET_TBL (c, i) VALUES ('::ffff:1.2.3.4', '::4.3.2.1/24');
  -- check that CIDR rejects invalid input:
  INSERT INTO INET_TBL (c, i) VALUES ('192.168.1.2/30', '192.168.1.226');
  INSERT INTO INET_TBL (c, i) VALUES ('1234::1234::1234', '::1.2.3.4');
  -- check that CIDR rejects invalid input when converting from text:
  INSERT INTO INET_TBL (c, i) VALUES (cidr('192.168.1.2/30'), '192.168.1.226');
  INSERT INTO INET_TBL (c, i) VALUES (cidr('ffff:ffff:ffff:ffff::/24'), '::192.168.1.226');
  SELECT '' AS ten, c AS cidr, i AS inet FROM INET_TBL;
  
  -- now test some support functions
  
  SELECT '' AS ten, i AS inet, host(i), text(i), family(i) FROM INET_TBL;
  SELECT '' AS ten, c AS cidr, broadcast(c),
    i AS inet, broadcast(i) FROM INET_TBL;
  SELECT '' AS ten, c AS cidr, network(c) AS "network(cidr)",
    i AS inet, network(i) AS "network(inet)" FROM INET_TBL;
  SELECT '' AS ten, c AS cidr, masklen(c) AS "masklen(cidr)",
    i AS inet, masklen(i) AS "masklen(inet)" FROM INET_TBL;
  
  SELECT '' AS four, c AS cidr, masklen(c) AS "masklen(cidr)",
    i AS inet, masklen(i) AS "masklen(inet)" FROM INET_TBL
    WHERE masklen(c) <= 8;
  
  SELECT '' AS six, c AS cidr, i AS inet FROM INET_TBL
    WHERE c = i;
  
  SELECT '' AS ten, i, c,
    i < c AS lt, i <= c AS le, i = c AS eq,
    i >= c AS ge, i > c AS gt, i <> c AS ne,
    i << c AS sb, i <<= c AS sbe,
    i >> c AS sup, i >>= c AS spe,
    i && c AS ovr
    FROM INET_TBL;
  
  SELECT max(i) AS max, min(i) AS min FROM INET_TBL;
  SELECT max(c) AS max, min(c) AS min FROM INET_TBL;
  
  -- check the conversion to/from text and set_netmask
  SELECT '' AS ten, set_masklen(inet(text(i)), 24) FROM INET_TBL;
  
  -- check that btree index works correctly
  CREATE INDEX inet_idx1 ON inet_tbl(i);
  SET enable_seqscan TO off;
  EXPLAIN (COSTS OFF)
  SELECT * FROM inet_tbl WHERE i<<'192.168.1.0/24'::cidr;
  SELECT * FROM inet_tbl WHERE i<<'192.168.1.0/24'::cidr;
  EXPLAIN (COSTS OFF)
  SELECT * FROM inet_tbl WHERE i<<='192.168.1.0/24'::cidr;
  SELECT * FROM inet_tbl WHERE i<<='192.168.1.0/24'::cidr;
  EXPLAIN (COSTS OFF)
  SELECT * FROM inet_tbl WHERE '192.168.1.0/24'::cidr >>= i;
  SELECT * FROM inet_tbl WHERE '192.168.1.0/24'::cidr >>= i;
  EXPLAIN (COSTS OFF)
  SELECT * FROM inet_tbl WHERE '192.168.1.0/24'::cidr >> i;
  SELECT * FROM inet_tbl WHERE '192.168.1.0/24'::cidr >> i;
  SET enable_seqscan TO on;
  DROP INDEX inet_idx1;
  
  -- check that gist index works correctly
  CREATE INDEX inet_idx2 ON inet_tbl using gist (i inet_ops);
  SET enable_seqscan TO off;
  SELECT * FROM inet_tbl WHERE i << '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i <<= '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i && '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i >>= '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i >> '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i < '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i <= '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i = '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i >= '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i > '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i <> '192.168.1.0/24'::cidr ORDER BY i;
  
  -- test index-only scans
  EXPLAIN (COSTS OFF)
  SELECT i FROM inet_tbl WHERE i << '192.168.1.0/24'::cidr ORDER BY i;
  SELECT i FROM inet_tbl WHERE i << '192.168.1.0/24'::cidr ORDER BY i;
  
  SET enable_seqscan TO on;
  DROP INDEX inet_idx2;
  
  -- check that spgist index works correctly
  CREATE INDEX inet_idx3 ON inet_tbl using spgist (i);
  SET enable_seqscan TO off;
  SELECT * FROM inet_tbl WHERE i << '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i <<= '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i && '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i >>= '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i >> '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i < '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i <= '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i = '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i >= '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i > '192.168.1.0/24'::cidr ORDER BY i;
  SELECT * FROM inet_tbl WHERE i <> '192.168.1.0/24'::cidr ORDER BY i;
  
  -- test index-only scans
  EXPLAIN (COSTS OFF)
  SELECT i FROM inet_tbl WHERE i << '192.168.1.0/24'::cidr ORDER BY i;
  SELECT i FROM inet_tbl WHERE i << '192.168.1.0/24'::cidr ORDER BY i;
  
  SET enable_seqscan TO on;
  DROP INDEX inet_idx3;
  
  -- simple tests of inet boolean and arithmetic operators
  SELECT i, ~i AS "~i" FROM inet_tbl;
  SELECT i, c, i & c AS "and" FROM inet_tbl;
  SELECT i, c, i | c AS "or" FROM inet_tbl;
  SELECT i, i + 500 AS "i+500" FROM inet_tbl;
  SELECT i, i - 500 AS "i-500" FROM inet_tbl;
  SELECT i, c, i - c AS "minus" FROM inet_tbl;
  SELECT '127.0.0.1'::inet + 257;
  SELECT ('127.0.0.1'::inet + 257) - 257;
  SELECT '127::1'::inet + 257;
  SELECT ('127::1'::inet + 257) - 257;
  SELECT '127.0.0.2'::inet  - ('127.0.0.2'::inet + 500);
  SELECT '127.0.0.2'::inet  - ('127.0.0.2'::inet - 500);
  SELECT '127::2'::inet  - ('127::2'::inet + 500);
  SELECT '127::2'::inet  - ('127::2'::inet - 500);
  -- these should give overflow errors:
  SELECT '127.0.0.1'::inet + 10000000000;
  SELECT '127.0.0.1'::inet - 10000000000;
  SELECT '126::1'::inet - '127::2'::inet;
  SELECT '127::1'::inet - '126::2'::inet;
  -- but not these
  SELECT '127::1'::inet + 10000000000;
  SELECT '127::1'::inet - '127::2'::inet;
  
  -- insert one more row with addressed from different families
  INSERT INTO INET_TBL (c, i) VALUES ('10', '10::/8');
  -- now, this one should fail
  SELECT inet_merge(c, i) FROM INET_TBL;
  -- fix it by inet_same_family() condition
  SELECT inet_merge(c, i) FROM INET_TBL WHERE inet_same_family(c, i);
  