Add background worker type

Add bgw_type field to background worker structure.  It is intended to be
set to the same value for all workers of the same type, so they can be
grouped in pg_stat_activity, for example.

The backend_type column in pg_stat_activity now shows bgw_type for a
background worker.  The ps listing also no longer calls out that a
process is a background worker but just show the bgw_type.  That way,
being a background worker is more of an implementation detail now that
is not shown to the user.  However, most log messages still refer to
'background worker "%s"'; otherwise constructing sensible and
translatable log messages would become tricky.

Reviewed-by: Michael Paquier <michael.paquier@gmail.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/test/modules/test_shm_mq/setup.c b/src/test/modules/test_shm_mq/setup.c
index 3ae90183605..561f6f9bac3 100644
--- a/src/test/modules/test_shm_mq/setup.c
+++ b/src/test/modules/test_shm_mq/setup.c
@@ -219,7 +219,7 @@ setup_background_workers(int nworkers, dsm_segment *seg)
 	worker.bgw_restart_time = BGW_NEVER_RESTART;
 	sprintf(worker.bgw_library_name, "test_shm_mq");
 	sprintf(worker.bgw_function_name, "test_shm_mq_main");
-	snprintf(worker.bgw_name, BGW_MAXLEN, "test_shm_mq");
+	snprintf(worker.bgw_type, BGW_MAXLEN, "test_shm_mq");
 	worker.bgw_main_arg = UInt32GetDatum(dsm_segment_handle(seg));
 	/* set bgw_notify_pid, so we can detect if the worker stops */
 	worker.bgw_notify_pid = MyProcPid;