// Remove bad _SQL_USE_SLAVE_ uses + normalize Db->executeS(), Db->execute() and Db->numRows() names

modules/referralprogram/ReferralProgramModule.php

@@ -143,7 +143,7 @@ class ReferralProgramModule extends ObjectModel
 				$query.= ' AND s.`id_customer` != 0';
 		}
 
-		return Db::getInstance(_PS_USE_SQL_SLAVE_)->ExecuteS($query);
+		return Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($query);
 	}
 
 	/**

modules/referralprogram/referralprogram.php

@@ -84,7 +84,7 @@ class ReferralProgram extends Module
 
 	public function installDB()
 	{
-		return Db::getInstance()->Execute('
+		return Db::getInstance()->execute('
 		CREATE TABLE `'._DB_PREFIX_.'referralprogram` (
 			`id_referralprogram` INT UNSIGNED NOT NULL AUTO_INCREMENT,
 			`id_sponsor` INT UNSIGNED NOT NULL,
@@ -116,7 +116,7 @@ class ReferralProgram extends Module
 
 	public function uninstallDB()
 	{
-		return Db::getInstance()->Execute('DROP TABLE `'._DB_PREFIX_.'referralprogram`;');
+		return Db::getInstance()->execute('DROP TABLE `'._DB_PREFIX_.'referralprogram`;');
 	}
 
 	public function removeMail()