/usr/share/postgresql/9.6/extension/pgpool-recovery.sql is in postgresql-9.6-pgpool2 3.6.1-1.
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 | CREATE OR REPLACE FUNCTION pgpool_recovery(text, text, text, text)
RETURNS bool
AS '$libdir/pgpool-recovery', 'pgpool_recovery'
LANGUAGE C STRICT;
CREATE OR REPLACE FUNCTION pgpool_remote_start(text, text)
RETURNS bool
AS '$libdir/pgpool-recovery', 'pgpool_remote_start'
LANGUAGE C STRICT;
CREATE OR REPLACE FUNCTION pgpool_pgctl(text, text)
RETURNS bool
AS '$libdir/pgpool-recovery', 'pgpool_pgctl'
LANGUAGE C STRICT;
CREATE OR REPLACE FUNCTION pgpool_switch_xlog(text)
RETURNS text
AS '$libdir/pgpool-recovery', 'pgpool_switch_xlog'
LANGUAGE C STRICT;
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