$NetBSD: patch-aa,v 1.2 2004/10/05 20:02:10 tsarna Exp $

Treat more informational messages as non-fatal, and add an
extension to allow an application to capture them.

--- Sybase.py.orig	2003-04-27 06:54:35.000000000 -0400
+++ Sybase.py	2004-10-05 15:01:02.000000000 -0400
@@ -129,6 +129,8 @@
 def Binary(str):
     return str
 
+_output_hooks = {}
+
 def _fmt_server(msg):
     parts = []
     for label, name in (('Msg', 'msgnumber'),
@@ -157,8 +159,17 @@
     raise DatabaseError(_fmt_client(msg))
 
 def _servermsg_cb(ctx, conn, msg):
-    if msg.msgnumber not in (5701, 5703):
-        raise DatabaseError(_fmt_server(msg))
+    mn = msg.msgnumber
+    if mn in (0, 5701, 5703, 5704) or ((mn >= 6200) and (mn < 6300)):
+        # Non-errors:
+        #    0      PRINT
+        # 5701      Changed db context
+        # 5703      Changed language
+        # 5704      Changed character set (Sybase)
+        # 6200-6299 SHOWPLAN output (Sybase)
+        _output_hooks.get(conn, lambda c,m: None)(conn, msg)
+    else:
+        raise DatabaseError(_fmt_server(msg))
 
 def _row_bind(cmd, count = 1):
     '''Bind buffers for count rows of column data.
@@ -838,6 +849,16 @@
         finally:
             self._unlock()
 
+    def set_output_hook(self, hook):
+        if hook is None:
+            if _output_hooks.has_key(self._conn):
+                del _output_hooks[self._conn]
+        else:
+            _output_hooks[self._conn] = hook
+
+    def get_output_hook(self, hook):
+        return _output_hooks.get(self._conn)
+        
     def __del__(self):
         try:
             self.close()