Merge pull request #1727 from JackBlower/1.8/develop

Quick fix for temporal join values.

classes/database/connection.php

@@ -659,11 +659,16 @@ public function quote_identifier($value)
 			return $this->quote_identifier($value).' AS '.$this->quote_identifier($alias);
 		}
 
+		if (preg_match('/^(["\']).*\1$/m', $value))
+		{
+			return $value;
+		}
+
 		if (strpos($value, '.') !== false)
 		{
 			// Split the identifier into the individual parts
-            // This is slightly broken, because a table or column name
-            // (or user-defined alias!) might legitimately contain a period.
+			// This is slightly broken, because a table or column name
+			// (or user-defined alias!) might legitimately contain a period.
 			$parts = explode('.', $value);
 
 			if ($prefix = $this->table_prefix())