1 files changed, 33 insertions, 0 deletions
diff --git a/framework/Data/TDbNullConversionMode.php b/framework/Data/TDbNullConversionMode.php
new file mode 100644
index 00000000..1171861a
--- /dev/null
+++ b/framework/Data/TDbNullConversionMode.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * TDbConnection class file
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright &copy; 2005-2014 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @package System.Data
+ */
+
+/**
+ * TDbNullConversionMode
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @package System.Data
+ * @since 3.0
+ */
+class TDbNullConversionMode extends TEnumerable
+{
+	/**
+	 * No conversion is performed for null and empty values.
+	 */
+	const Preserved='Preserved';
+	/**
+	 * NULL is converted to empty string
+	 */
+	const NullToEmptyString='NullToEmptyString';
+	/**
+	 * Empty string is converted to NULL
+	 */
+	const EmptyStringToNull='EmptyStringToNull';
+}
+\ No newline at end of file