From d6c8e8d7aca9ab175e6aefef9974b65bd589dd80 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Mon, 13 Oct 2014 16:11:43 -0400
Subject: [PATCH] Consistently use NULL for invalid GUC unit strings

Patch by Euler Taveira
---
 src/backend/utils/misc/guc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index 8111b93074..dca533ac91 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -7734,7 +7734,7 @@ GetConfigOptionByNum(int varnum, const char **values, bool *noshow)
 				values[2] = "min";
 				break;
 			default:
-				values[2] = "";
+				values[2] = NULL;
 				break;
 		}
 	}