TECHNIQUES FOR MAINTAINING COMPATIBILITY IN DATABASE SCHEMAS

摘要

A method of accommodating at least one difference between a first database schema and a second database schema is provided. The method includes receiving a request generated by an application program using a first version of a database schema, and generating a response including a reserved element that corresponds to a custom slot provided in the first version of the database schema. The method further includes communicating the response to the application program.

主权项

1. A method comprising:
receiving a response generated by a first application program using a first database schema; identifying a value in the response that is unrecognizable to a second application program using a second database schema; substituting, using a processor, the value that is unrecognizable to the second application program with a reserved element recognizable to the second application program, the reserved element indicating to the second application program that a portion of the response is not recognizable to the second application program; and communicating the response to the second application program.