-- test old extension version entry points
DROP EXTENSION pageinspect;
CREATE EXTENSION pageinspect VERSION '1.8';
CREATE TABLE test1 (a int8, b text);
INSERT INTO test1 VALUES (72057594037927937, 'text');
CREATE INDEX test1_a_idx ON test1 USING btree (a);
-- from page.sql
SELECT octet_length(get_raw_page('test1', 0)) AS main_0;
 main_0 
--------
   8192
(1 row)

SELECT octet_length(get_raw_page('test1', 'main', 0)) AS main_0;
 main_0 
--------
   8192
(1 row)

SELECT page_checksum(get_raw_page('test1', 0), 0) IS NOT NULL AS silly_checksum_test;
 silly_checksum_test 
---------------------
 t
(1 row)

-- from btree.sql
SELECT * FROM bt_page_stats('test1_a_idx', 1);
 blkno | type | live_items | dead_items | avg_item_size | page_size | free_size | btpo_prev | btpo_next | btpo | btpo_flags 
-------+------+------------+------------+---------------+-----------+-----------+-----------+-----------+------+------------
     1 | l    |          1 |          0 |            16 |      8192 |      8128 |         0 |         0 |    0 |          3
(1 row)

SELECT * FROM bt_page_items('test1_a_idx', 1);
 itemoffset | ctid  | itemlen | nulls | vars |          data           | dead | htid  | tids 
------------+-------+---------+-------+------+-------------------------+------+-------+------
          1 | (0,1) |      16 | f     | f    | 01 00 00 00 00 00 00 01 | f    | (0,1) | 
(1 row)

-- page_header() uses int instead of smallint for lower, upper, special and
-- pagesize in pageinspect >= 1.10.
ALTER EXTENSION pageinspect UPDATE TO '1.9';
\df page_header
                                                                                                                  List of functions
 Schema |    Name     | Result data type |                                                                                         Argument data types                                                                                         | Type 
--------+-------------+------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+------
 public | page_header | record           | page bytea, OUT lsn pg_lsn, OUT checksum smallint, OUT flags smallint, OUT lower smallint, OUT upper smallint, OUT special smallint, OUT pagesize smallint, OUT version smallint, OUT prune_xid xid | func
(1 row)

SELECT pagesize, version FROM page_header(get_raw_page('test1', 0));
 pagesize | version 
----------+---------
     8192 |       4
(1 row)

DROP TABLE test1;
DROP EXTENSION pageinspect;