\echo This script is designed to run in a database called 'test'
\echo and requires installation of /contrib/pageinspect and
\echo /contrib/pg_freespacemap.
\c test

DROP TABLE IF EXISTS mvcc_demo;
CREATE TABLE mvcc_demo (val INTEGER);

DROP VIEW IF EXISTS mvcc_demo_page0;
CREATE VIEW mvcc_demo_page0 AS
	SELECT  '(0,' || lp || ')' AS ctid,
	        CASE lp_flags
	                WHEN 0 THEN 'Unused'
	                WHEN 1 THEN 'Normal'
	                WHEN 2 THEN 'Redirect to ' || lp_off
	                WHEN 3 THEN 'Dead'
	        END,
	        t_xmin::text::int8 AS xmin,
	        t_xmax::text::int8 AS xmax, 
		t_ctid
	FROM heap_page_items(get_raw_page('mvcc_demo', 0))
	ORDER BY lp;