text: set enable_seqscan=off;
  
  CREATE TABLE test_cidr (
  	i cidr
  );
  
  INSERT INTO test_cidr VALUES
  	( '1.2.3.4' ),
  	( '1.2.4.4' ),
  	( '1.2.5.4' ),
  	( '1.2.6.4' ),
  	( '1.2.7.4' ),
  	( '1.2.8.4' )
  ;
  
  CREATE INDEX idx_cidr ON test_cidr USING gin (i);
  
  SELECT * FROM test_cidr WHERE i<'1.2.6.4'::cidr ORDER BY i;
  SELECT * FROM test_cidr WHERE i<='1.2.6.4'::cidr ORDER BY i;
  SELECT * FROM test_cidr WHERE i='1.2.6.4'::cidr ORDER BY i;
  SELECT * FROM test_cidr WHERE i>='1.2.6.4'::cidr ORDER BY i;
  SELECT * FROM test_cidr WHERE i>'1.2.6.4'::cidr ORDER BY i;
  