Mark advisory-lock functions as parallel restricted, not parallel unsafe.

There seems no good reason not to allow a parallel leader to execute
these functions.  (The workers still can't, though.  Although the code
would work, any such lock would go away at worker exit, which is not
the documented behavior of advisory locks.)

Discussion: https://postgr.es/m/11847.1564496844@sss.pgh.pa.us

src/include/catalog/catversion.h

@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	201907222
+#define CATALOG_VERSION_NO	201908011
 
 #endif

src/include/catalog/pg_proc.dat

@@ -7951,87 +7951,87 @@
 
 # userlock replacements
 { oid => '2880', descr => 'obtain exclusive advisory lock',
-  proname => 'pg_advisory_lock', provolatile => 'v', proparallel => 'u',
+  proname => 'pg_advisory_lock', provolatile => 'v', proparallel => 'r',
   prorettype => 'void', proargtypes => 'int8',
   prosrc => 'pg_advisory_lock_int8' },
 { oid => '3089', descr => 'obtain exclusive advisory lock',
-  proname => 'pg_advisory_xact_lock', provolatile => 'v', proparallel => 'u',
+  proname => 'pg_advisory_xact_lock', provolatile => 'v', proparallel => 'r',
   prorettype => 'void', proargtypes => 'int8',
   prosrc => 'pg_advisory_xact_lock_int8' },
 { oid => '2881', descr => 'obtain shared advisory lock',
-  proname => 'pg_advisory_lock_shared', provolatile => 'v', proparallel => 'u',
+  proname => 'pg_advisory_lock_shared', provolatile => 'v', proparallel => 'r',
   prorettype => 'void', proargtypes => 'int8',
   prosrc => 'pg_advisory_lock_shared_int8' },
 { oid => '3090', descr => 'obtain shared advisory lock',
   proname => 'pg_advisory_xact_lock_shared', provolatile => 'v',
-  proparallel => 'u', prorettype => 'void', proargtypes => 'int8',
+  proparallel => 'r', prorettype => 'void', proargtypes => 'int8',
   prosrc => 'pg_advisory_xact_lock_shared_int8' },
 { oid => '2882', descr => 'obtain exclusive advisory lock if available',
-  proname => 'pg_try_advisory_lock', provolatile => 'v', proparallel => 'u',
+  proname => 'pg_try_advisory_lock', provolatile => 'v', proparallel => 'r',
   prorettype => 'bool', proargtypes => 'int8',
   prosrc => 'pg_try_advisory_lock_int8' },
 { oid => '3091', descr => 'obtain exclusive advisory lock if available',
   proname => 'pg_try_advisory_xact_lock', provolatile => 'v',
-  proparallel => 'u', prorettype => 'bool', proargtypes => 'int8',
+  proparallel => 'r', prorettype => 'bool', proargtypes => 'int8',
   prosrc => 'pg_try_advisory_xact_lock_int8' },
 { oid => '2883', descr => 'obtain shared advisory lock if available',
   proname => 'pg_try_advisory_lock_shared', provolatile => 'v',
-  proparallel => 'u', prorettype => 'bool', proargtypes => 'int8',
+  proparallel => 'r', prorettype => 'bool', proargtypes => 'int8',
   prosrc => 'pg_try_advisory_lock_shared_int8' },
 { oid => '3092', descr => 'obtain shared advisory lock if available',
   proname => 'pg_try_advisory_xact_lock_shared', provolatile => 'v',
-  proparallel => 'u', prorettype => 'bool', proargtypes => 'int8',
+  proparallel => 'r', prorettype => 'bool', proargtypes => 'int8',
   prosrc => 'pg_try_advisory_xact_lock_shared_int8' },
 { oid => '2884', descr => 'release exclusive advisory lock',
-  proname => 'pg_advisory_unlock', provolatile => 'v', proparallel => 'u',
+  proname => 'pg_advisory_unlock', provolatile => 'v', proparallel => 'r',
   prorettype => 'bool', proargtypes => 'int8',
   prosrc => 'pg_advisory_unlock_int8' },
 { oid => '2885', descr => 'release shared advisory lock',
   proname => 'pg_advisory_unlock_shared', provolatile => 'v',
-  proparallel => 'u', prorettype => 'bool', proargtypes => 'int8',
+  proparallel => 'r', prorettype => 'bool', proargtypes => 'int8',
   prosrc => 'pg_advisory_unlock_shared_int8' },
 { oid => '2886', descr => 'obtain exclusive advisory lock',
-  proname => 'pg_advisory_lock', provolatile => 'v', proparallel => 'u',
+  proname => 'pg_advisory_lock', provolatile => 'v', proparallel => 'r',
   prorettype => 'void', proargtypes => 'int4 int4',
   prosrc => 'pg_advisory_lock_int4' },
 { oid => '3093', descr => 'obtain exclusive advisory lock',
-  proname => 'pg_advisory_xact_lock', provolatile => 'v', proparallel => 'u',
+  proname => 'pg_advisory_xact_lock', provolatile => 'v', proparallel => 'r',
   prorettype => 'void', proargtypes => 'int4 int4',
   prosrc => 'pg_advisory_xact_lock_int4' },
 { oid => '2887', descr => 'obtain shared advisory lock',
-  proname => 'pg_advisory_lock_shared', provolatile => 'v', proparallel => 'u',
+  proname => 'pg_advisory_lock_shared', provolatile => 'v', proparallel => 'r',
   prorettype => 'void', proargtypes => 'int4 int4',
   prosrc => 'pg_advisory_lock_shared_int4' },
 { oid => '3094', descr => 'obtain shared advisory lock',
   proname => 'pg_advisory_xact_lock_shared', provolatile => 'v',
-  proparallel => 'u', prorettype => 'void', proargtypes => 'int4 int4',
+  proparallel => 'r', prorettype => 'void', proargtypes => 'int4 int4',
   prosrc => 'pg_advisory_xact_lock_shared_int4' },
 { oid => '2888', descr => 'obtain exclusive advisory lock if available',
-  proname => 'pg_try_advisory_lock', provolatile => 'v', proparallel => 'u',
+  proname => 'pg_try_advisory_lock', provolatile => 'v', proparallel => 'r',
   prorettype => 'bool', proargtypes => 'int4 int4',
   prosrc => 'pg_try_advisory_lock_int4' },
 { oid => '3095', descr => 'obtain exclusive advisory lock if available',
   proname => 'pg_try_advisory_xact_lock', provolatile => 'v',
-  proparallel => 'u', prorettype => 'bool', proargtypes => 'int4 int4',
+  proparallel => 'r', prorettype => 'bool', proargtypes => 'int4 int4',
   prosrc => 'pg_try_advisory_xact_lock_int4' },
 { oid => '2889', descr => 'obtain shared advisory lock if available',
   proname => 'pg_try_advisory_lock_shared', provolatile => 'v',
-  proparallel => 'u', prorettype => 'bool', proargtypes => 'int4 int4',
+  proparallel => 'r', prorettype => 'bool', proargtypes => 'int4 int4',
   prosrc => 'pg_try_advisory_lock_shared_int4' },
 { oid => '3096', descr => 'obtain shared advisory lock if available',
   proname => 'pg_try_advisory_xact_lock_shared', provolatile => 'v',
-  proparallel => 'u', prorettype => 'bool', proargtypes => 'int4 int4',
+  proparallel => 'r', prorettype => 'bool', proargtypes => 'int4 int4',
   prosrc => 'pg_try_advisory_xact_lock_shared_int4' },
 { oid => '2890', descr => 'release exclusive advisory lock',
-  proname => 'pg_advisory_unlock', provolatile => 'v', proparallel => 'u',
+  proname => 'pg_advisory_unlock', provolatile => 'v', proparallel => 'r',
   prorettype => 'bool', proargtypes => 'int4 int4',
   prosrc => 'pg_advisory_unlock_int4' },
 { oid => '2891', descr => 'release shared advisory lock',
   proname => 'pg_advisory_unlock_shared', provolatile => 'v',
-  proparallel => 'u', prorettype => 'bool', proargtypes => 'int4 int4',
+  proparallel => 'r', prorettype => 'bool', proargtypes => 'int4 int4',
   prosrc => 'pg_advisory_unlock_shared_int4' },
 { oid => '2892', descr => 'release all advisory locks',
-  proname => 'pg_advisory_unlock_all', provolatile => 'v', proparallel => 'u',
+  proname => 'pg_advisory_unlock_all', provolatile => 'v', proparallel => 'r',
   prorettype => 'void', proargtypes => '', prosrc => 'pg_advisory_unlock_all' },
 
 # XML support