Hi,
> These functions cannot be executed during recovery (except
> <function>pg_is_in_backup</function>, <function>pg_backup_start_time</function>
> and <function>pg_wal_lsn_diff</function>).
Regarding backup control functions, the func.sgml describes as above.
But non-exclusive pg_start_backup and pg_stop_backup can also be
executed during recovery, and which should be described in the doc.
So I think that the attached patch should be pushed. Thought?
Probably the patch needs to be back-patched to 9.6 where non-exclusive
backup API was added.
Regards,
--
Fujii Masao
