Add C comment mentioning pg_stat_activity.procpid should have been

bmomjian · bmomjian · commit a4bebdd92624 · 2011-06-11T10:00:28.000-04:00
called 'pid'.
diff --git a/src/backend/utils/adt/pgstatfuncs.c b/src/backend/utils/adt/pgstatfuncs.c
@@ -509,6 +509,7 @@ pg_stat_get_activity(PG_FUNCTION_ARGS)
 		tupdesc = CreateTemplateTupleDesc(12, false);
 		TupleDescInitEntry(tupdesc, (AttrNumber) 1, "datid",
 						   OIDOID, -1, 0);
+		/* This should have been called 'pid';  can't change it. 2011-06-11 */
 		TupleDescInitEntry(tupdesc, (AttrNumber) 2, "procpid",
 						   INT4OID, -1, 0);
 		TupleDescInitEntry(tupdesc, (AttrNumber) 3, "usesysid",
