improved oparsing of CLOB in Oracle, thanks Daniel

VERSION

@@ -1 +1 @@
-Version 2.00.0 (2012-08-24 09:15:19) dev
+Version 2.00.0 (2012-08-24 09:23:07) dev

gluon/dal.py

@@ -2735,6 +2735,14 @@ class OracleAdapter(BaseAdapter):
         self.execute('SELECT %s.currval FROM dual;' % sequence_name)
         return int(self.cursor.fetchone()[0])
 
+    def parse_value(self, value, field_type, blob_decode=True):
+        if blob_decode and isinstance(value, cx_Oracle.LOB):
+            try:
+                value = value.read()
+            except cx_Oracle.ProgrammingError:
+                # After a subsequent fetch the LOB value is not valid anymore
+                pass
+        return BaseAdapter.parse_value(self, value, field_type, blob_decode)
 
 class MSSQLAdapter(BaseAdapter):