Low-overhead built-in timestamp column for relational...

Details Low-overhead built-in timestamp column for relational... Low-overhead built-in timestamp column for relational...

2004-02-11

2009-11-24

Pannala, Sathyanarayan (Department: 2164)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000

Reexamination Certificate

active

07624119

ABSTRACT:
A method for providing a timestamp for data in a database system, in which the database system operates in accordance with a database schema. The method includes providing a hidden timestamp column in a table in the database system, in which the hidden timestamp column includes a timestamp value for each row of data in the table. The timestamp value indicates a last time a corresponding row of data in the table was previously modified. The hidden timestamp column does not appear in the database schema by default and exposes the timestamp value for a given row of data in the table only to a query that calls the timestamp column by name.

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