/usr/share/postgresql/9.3/extension/pgrowlocks--1.0--1.1.sql is in postgresql-contrib-9.3 9.3.24-0ubuntu0.14.04.
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 | /* contrib/pgrowlocks/pgrowlocks--1.0--1.1.sql */
-- complain if script is sourced in psql, rather than via ALTER EXTENSION
\echo Use "ALTER EXTENSION pgrowlocks UPDATE TO '1.1'" to load this file. \quit
ALTER EXTENSION pgrowlocks DROP FUNCTION pgrowlocks(text);
DROP FUNCTION pgrowlocks(text);
CREATE FUNCTION pgrowlocks(IN relname text,
OUT locked_row TID, -- row TID
OUT locker XID, -- locking XID
OUT multi bool, -- multi XID?
OUT xids xid[], -- multi XIDs
OUT modes text[], -- multi XID statuses
OUT pids INTEGER[]) -- locker's process id
RETURNS SETOF record
AS 'MODULE_PATHNAME', 'pgrowlocks'
LANGUAGE C STRICT;
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