/usr/share/postgresql/10/extension/pageinspect--unpackaged--1.0.sql is in postgresql-10 10.6-0ubuntu0.18.04.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | /* contrib/pageinspect/pageinspect--unpackaged--1.0.sql */
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION pageinspect FROM unpackaged" to load this file. \quit
DROP FUNCTION heap_page_items(bytea);
CREATE FUNCTION heap_page_items(IN page bytea,
OUT lp smallint,
OUT lp_off smallint,
OUT lp_flags smallint,
OUT lp_len smallint,
OUT t_xmin xid,
OUT t_xmax xid,
OUT t_field3 int4,
OUT t_ctid tid,
OUT t_infomask2 integer,
OUT t_infomask integer,
OUT t_hoff smallint,
OUT t_bits text,
OUT t_oid oid)
RETURNS SETOF record
AS 'MODULE_PATHNAME', 'heap_page_items'
LANGUAGE C STRICT;
ALTER EXTENSION pageinspect ADD function get_raw_page(text,integer);
ALTER EXTENSION pageinspect ADD function get_raw_page(text,text,integer);
ALTER EXTENSION pageinspect ADD function page_header(bytea);
ALTER EXTENSION pageinspect ADD function bt_metap(text);
ALTER EXTENSION pageinspect ADD function bt_page_stats(text,integer);
ALTER EXTENSION pageinspect ADD function bt_page_items(text,integer);
ALTER EXTENSION pageinspect ADD function fsm_page_contents(bytea);
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