dresende#29 - Allows null and undefined to be treated differently.

Author: kcphysics

lib/Dialects/postgresql.js

@@ -17,9 +17,11 @@ exports.escapeId = function () {
 };
 
 exports.escapeVal = function (val, timeZone) {
-	if (val === undefined || val === null) {
-		return 'NULL';
-	}
+    if (val === undefined){
+        return 'DEFAULT';
+    }else if(val === null){
+        return 'NULL';
+    }
 
 	if (Array.isArray(val)) {
 		if (val.length === 1 && Array.isArray(val[0])) {