Add callproc() support.

MySQLdb/MySQLdb/cursors.py

@@ -188,7 +188,43 @@ class BaseCursor(object):
         self._executed = query
         self._warning_check()
         return r
+    
+    def callproc(self, procname, *args):
 
+        """Execute stored procedure procname with args
+        
+        procname -- string, name of procedure to execute on server
+
+        args -- Sequence of parameters to use with procedure
+
+        Returns the original args.
+
+        Compatibility warning: PEP-249 specifies that any modified
+        parameters must be returned. This is currently impossible
+        as they are only available by storing them in a server
+        variable and then retrieved by a query. Since stored
+        procedures return zero or more result sets, there is no
+        reliable way to get at OUT or INOUT parameters via callproc.
+        The server variables are named @_procname_n, where procname
+        is the parameter above and n is the position of the parameter
+        (from zero). Once all result sets generated by the procedure
+        have been fetched, you can issue a SELECT @_procname_0, ...
+        query using .execute() to get any OUT or INOUT values.
+        """
+        
+        db = self._get_db()
+        for index, arg in enumerate(args):
+            db.query("SET @_%s_%d=%s" % (procname, index,
+                                         db.literal(arg)))
+        q = "CALL %s(%s)" % (procname,
+                             ','.join(['@_%s_%d' % (procname, i)
+                                       for i in range(len(args))]))
+        if type(q) is UnicodeType:
+            q = q.encode(db.charset)
+        db.query(q)
+        self._do_get_result()
+        return args
+    
     def _do_query(self, q):
         from types import UnicodeType
         db = self._get_db()