From 1e251d36b6dafeeafc3e1bea5b13bd9d6d10c8de Mon Sep 17 00:00:00 2001
From: James Collins <james@om4.com.au>
Date: Wed, 10 Sep 2014 09:47:09 +0800
Subject: [PATCH] Fix query error when saving tax rates

Fixes #6202
---
 includes/admin/settings/class-wc-settings-tax.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/includes/admin/settings/class-wc-settings-tax.php b/includes/admin/settings/class-wc-settings-tax.php
index d212ba869c5..7df9c93d632 100644
--- a/includes/admin/settings/class-wc-settings-tax.php
+++ b/includes/admin/settings/class-wc-settings-tax.php
@@ -723,7 +723,9 @@ class WC_Settings_Tax extends WC_Settings_Page {
 						}
 					}
 
-					$wpdb->query( "INSERT INTO {$wpdb->prefix}woocommerce_tax_rate_locations ( location_code, tax_rate_id, location_type ) VALUES " . implode( ',', $postcode_query ) );
+					if ( !empty( $postcode_query ) ) {
+						$wpdb->query( "INSERT INTO {$wpdb->prefix}woocommerce_tax_rate_locations ( location_code, tax_rate_id, location_type ) VALUES " . implode( ',', $postcode_query ) );
+					}
 
 				}