From 0d292e2b788296ddb569c2f9fdf4b4895dec5370 Mon Sep 17 00:00:00 2001
From: Andrew Hutchings <andrew@linuxjedi.co.uk>
Date: Tue, 4 Oct 2016 17:23:10 +0100
Subject: [PATCH] MCOL-347 Fix NULLIF() for DATETIME with DATE

Comparing DATETIME with DATE compared two different date int formats
---
 utils/funcexp/func_nullif.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/utils/funcexp/func_nullif.cpp b/utils/funcexp/func_nullif.cpp
index 9db0f8e5b..4c12f2a6b 100644
--- a/utils/funcexp/func_nullif.cpp
+++ b/utils/funcexp/func_nullif.cpp
@@ -362,7 +362,8 @@ int64_t Func_nullif::getDatetimeIntVal(rowgroup::Row& row,
 		}
 		case execplan::CalpontSystemCatalog::DATE:
 		{
-			exp2 = parm[1]->data()->getDateIntVal(row, isNull);
+			// Upgrade to datetime for proper comparison
+			exp2 = parm[1]->data()->getDatetimeIntVal(row, isNull);
 			if (isNull) {
 				isNull = false;
 				return exp1;