CREATE EXTENSION pageinspect;
CREATE TABLE test1 (a int, b int);
INSERT INTO test1 VALUES (16777217, 131584);
VACUUM test1;  -- set up FSM
-- The page contents can vary, so just test that it can be read
-- successfully, but don't keep the output.
SELECT octet_length(get_raw_page('test1', 'main', 0)) AS main_0;
 main_0 
--------
   8192
(1 row)

SELECT octet_length(get_raw_page('test1', 'main', 1)) AS main_1;
ERROR:  block number 1 is out of range for relation "test1"
SELECT octet_length(get_raw_page('test1', 'fsm', 0)) AS fsm_0;
 fsm_0 
-------
  8192
(1 row)

SELECT octet_length(get_raw_page('test1', 'fsm', 1)) AS fsm_1;
 fsm_1 
-------
  8192
(1 row)

SELECT octet_length(get_raw_page('test1', 'vm', 0)) AS vm_0;
 vm_0 
------
 8192
(1 row)

SELECT octet_length(get_raw_page('test1', 'vm', 1)) AS vm_1;
ERROR:  block number 1 is out of range for relation "test1"
SELECT octet_length(get_raw_page('xxx', 'main', 0));
ERROR:  relation "xxx" does not exist
SELECT octet_length(get_raw_page('test1', 'xxx', 0));
ERROR:  invalid fork name
HINT:  Valid fork names are "main", "fsm", "vm", and "init".
SELECT get_raw_page('test1', 0) = get_raw_page('test1', 'main', 0);
 ?column? 
----------
 t
(1 row)

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

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

SELECT tuple_data_split('test1'::regclass, t_data, t_infomask, t_infomask2, t_bits)
    FROM heap_page_items(get_raw_page('test1', 0));
       tuple_data_split        
-------------------------------
 {"\\x01000001","\\x00020200"}
(1 row)

SELECT * FROM fsm_page_contents(get_raw_page('test1', 'fsm', 0));
 fsm_page_contents 
-------------------
 0: 254           +
 1: 254           +
 3: 254           +
 7: 254           +
 15: 254          +
 31: 254          +
 63: 254          +
 127: 254         +
 255: 254         +
 511: 254         +
 1023: 254        +
 2047: 254        +
 4095: 254        +
 fp_next_slot: 0  +
 
(1 row)

DROP TABLE test1;
-- check that using any of these functions with a partitioned table would fail
create table test_partitioned (a int) partition by range (a);
select get_raw_page('test_partitioned', 0); -- error about partitioned table
ERROR:  cannot get raw page from partitioned table "test_partitioned"
-- a regular table which is a member of a partition set should work though
create table test_part1 partition of test_partitioned for values from ( 1 ) to (100);
select get_raw_page('test_part1', 0); -- get farther and error about empty table
ERROR:  block number 0 is out of range for relation "test_part1"
drop table test_partitioned;