Add function to access backend pid, pg_stat_get_backend_mypid.

src/backend/utils/adt/pgstatfuncs.c

@@ -19,6 +19,7 @@ extern Datum pg_stat_get_blocks_fetched(PG_FUNCTION_ARGS);
 extern Datum pg_stat_get_blocks_hit(PG_FUNCTION_ARGS);
 
 extern Datum pg_stat_get_backend_idset(PG_FUNCTION_ARGS);
+extern Datum pg_stat_get_backend_mypid(PG_FUNCTION_ARGS);
 extern Datum pg_stat_get_backend_pid(PG_FUNCTION_ARGS);
 extern Datum pg_stat_get_backend_dbid(PG_FUNCTION_ARGS);
 extern Datum pg_stat_get_backend_userid(PG_FUNCTION_ARGS);
@@ -211,6 +212,13 @@ pg_stat_get_backend_idset(PG_FUNCTION_ARGS)
 }
 
 
+Datum
+pg_stat_get_backend_mypid(PG_FUNCTION_ARGS)
+{
+	PG_RETURN_INT32(MyProcPid);
+}
+
+
 Datum
 pg_stat_get_backend_pid(PG_FUNCTION_ARGS)
 {

src/include/catalog/pg_proc.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: pg_proc.h,v 1.246 2002/07/24 19:11:13 petere Exp $
+ * $Id: pg_proc.h,v 1.247 2002/07/31 00:40:40 momjian Exp $
  *
  * NOTES
  *	  The script catalog/genbki.sh reads this file and generates .bki
@@ -2703,6 +2703,8 @@ DATA(insert OID = 1935 (  pg_stat_get_blocks_hit		PGNSP PGUID 12 f f t f s 1 20
 DESCR("Statistics: Number of blocks found in cache");
 DATA(insert OID = 1936 (  pg_stat_get_backend_idset		PGNSP PGUID 12 f f t t s 0 23 ""	pg_stat_get_backend_idset - _null_ ));
 DESCR("Statistics: Currently active backend IDs");
+DATA(insert OID = 2026 (  pg_stat_get_backend_mypid		PGNSP PGUID 12 f f t f s 0 23 ""	pg_stat_get_backend_mypid - _null_ ));
+DESCR("Statistics: My backend ID");
 DATA(insert OID = 1937 (  pg_stat_get_backend_pid		PGNSP PGUID 12 f f t f s 1 23 "23"  pg_stat_get_backend_pid - _null_ ));
 DESCR("Statistics: PID of backend");
 DATA(insert OID = 1938 (  pg_stat_get_backend_dbid		PGNSP PGUID 12 f f t f s 1 26 "23"  pg_stat_get_backend_dbid - _null_ ));