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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 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;
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