[PATCH]A patch for SilverStripe to mimic the MySQL-Mode ANSI as with MySQL <5.7.x (remove ONLY_FULL_GROUP_BY)

diff --git a/model/connect/MySQLDatabase.php b/model/connect/MySQLDatabase.php
index f0628e4..db011c4 100644
--- a/model/connect/MySQLDatabase.php
+++ b/model/connect/MySQLDatabase.php
@@ -42,7 +42,7 @@ class MySQLDatabase extends SS_Database {
 		$this->connector->connect($parameters);
 
 		// This is important!
-		$this->setSQLMode('ANSI');
+		$this->setSQLMode('REAL_AS_FLOAT,PIPES_AS_CONCAT,ANSI_QUOTES,IGNORE_SPACE');
 
 		if (isset($parameters['timezone'])) {
 			$this->selectTimezone($parameters['timezone']);