Method and apparatus for implementing recursive remote procedure calls

A database system, comprising:

• a memory storing processor-executable process steps;
• an interface for receiving a database request message from a client device;
• and
• at least a first processor in communication with the memory and operative in conjunction with the stored process steps to:
• process the database request message to identify a user-defined extension (UDE) portion to be processed by a UDE server;
• establish a call stack to track a procedure request based on the UDE portion;
• transmit the procedure request to the UDE server;
• and
• determine if a response received from the UDE server is a reply to the procedure request before closing a call stack associated with the database request message.

A medium storing processor-executable process steps, the process steps comprising:

• a step to process a database request message to identify a user-defined extension (UDE) portion to be processed by a UDE server;
• a step to establish a call stack to track a procedure request based on the UDE portion;
• a step to transmit the procedure request to the UDE server;
• and
• a step to determine if a response received from the UDE server is a reply to the procedure request before closing a call stack associated with the database request message.

A system, comprising:

• a client device;
• a database server, in communication with the client device to receive a database request message and to transmit a response to the database request message;
• and
• a UDE server, in communication with the database server to receive a procedure request based on a UDE portion of the database request message and to transmit a reply message to the database server, the database server determining if the reply message is a reply to the procedure request by identifying the reply message as a procedure reply and by determining that the procedure request is the next open procedure in a call stack of the database server.