diff -r bb8c729ae6ce -r b82c7c2fb5af pgtoolkit/pgmanager.py
--- a/pgtoolkit/pgmanager.py	Wed Sep 26 23:32:02 2012 +0200
+++ b/pgtoolkit/pgmanager.py	Sat Sep 29 12:08:47 2012 +0200
@@ -139,32 +139,29 @@
     def __contains__(self, key):
         return key in self._dict
 
+    def keys(self):
+        return self._dict.keys()
+
 
 class Cursor(psycopg2.extensions.cursor):
 
     def execute(self, query, args=None):
+        # log query before executing
+        self._log_query(query, args)
         try:
             return super(Cursor, self).execute(query, args)
         except DatabaseError:
-            # log query and exception
-            self._log_query(query, args)
             self._log_exception()
             raise
-        else:
-            # log query from self.query
-            self._log_query()
 
     def callproc(self, procname, args=None):
+        # log query before executing (not query actually executed but should correspond)
+        self._log_query(self._build_callproc_query(procname, len(args)), args)
         try:
             return super(Cursor, self).callproc(procname, args)
         except DatabaseError:
-            # log query and exception
-            self._log_query(self._build_callproc_query(procname, len(args)), args)
             self._log_exception()
             raise
-        else:
-            # log query from self.query
-            self._log_query()
 
     def row_dict(self, row, lstrip=None):
         adjustname = lambda a: a
@@ -222,7 +219,7 @@
         log_sql.exception('[%s] exception:' % (name,))
 
     def _build_callproc_query(self, procname, num_args):
-        return 'SELECT * FROM %s(%s)' %(procname, ', '.join('%s'))
+        return 'SELECT * FROM %s(%s)' % (procname, ', '.join(['%s'] * num_args))
 
 
 class Connection(psycopg2.extensions.connection):