From 161bb30b51a636312963ea87037d9cada8c2787d Mon Sep 17 00:00:00 2001
From: JKingsnorth <john@johnkingsnorth.co.uk>
Date: Wed, 8 Apr 2015 14:57:10 +0100
Subject: [PATCH] CRM-16256: Skip empty fields on dedupe

---
 CRM/Dedupe/BAO/Rule.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/CRM/Dedupe/BAO/Rule.php b/CRM/Dedupe/BAO/Rule.php
index c268422f46..8ce162446b 100644
--- a/CRM/Dedupe/BAO/Rule.php
+++ b/CRM/Dedupe/BAO/Rule.php
@@ -150,6 +150,7 @@ class CRM_Dedupe_BAO_Rule extends CRM_Dedupe_DAO_Rule {
       if ($this->rule_length) {
         $where[] = "SUBSTR(t1.{$this->rule_field}, 1, {$this->rule_length}) = SUBSTR('$str', 1, {$this->rule_length})";
         $where[] = "t1.{$this->rule_field} IS NOT NULL";
+        $where[] = "t1.{$this->rule_field} <> ''";
       }
       else {
         $where[] = "t1.{$this->rule_field} = '$str'";
@@ -168,6 +169,7 @@ class CRM_Dedupe_BAO_Rule extends CRM_Dedupe_DAO_Rule {
     if (!$this->params) {
       $where[] = "t1.$id < t2.$id";
       $where[] = "t1.{$this->rule_field} IS NOT NULL";
+      $where[] = "t1.{$this->rule_field} <> ''";
     }
     if ($this->contactIds) {
       $cids = array();
-- 
2.25.1