From c7554ac611f451371a6d910ec1d463514a425aa7 Mon Sep 17 00:00:00 2001
From: Jamie Cameron <jcameron@webmin.com>
Date: Fri, 27 May 2016 14:52:40 -0700
Subject: [PATCH] Only treat undef as null

---
 mysql/mysql-lib.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mysql/mysql-lib.pl b/mysql/mysql-lib.pl
index d9b4e06fd..f49c0dd31 100755
--- a/mysql/mysql-lib.pl
+++ b/mysql/mysql-lib.pl
@@ -359,7 +359,7 @@ foreach my $p (@params) {
 	&error("Incorrect number of parameters") if ($pos < 0);
 	local $qp = $p;
 	$qp =~ s/'/''/g;
-	$qp = $qp eq '' ? 'NULL' : "'$qp'";
+	$qp = !defined($qp) ? 'NULL' : "'$qp'";
 	$sql = substr($sql, 0, $pos).$qp.substr($sql, $pos+1);
 	$pos += length($qp)-1;
 	}