Resources Contact Us Home
Restructuring view maintenance system and method

Image Number 2 for United States Patent #6915305.

A database maintenance system and method are particularly suitable for maintaining a consistency of data between two or more database tables having schemas that may be heterogeneous (e.g., restructuring views of each other). Typically, one table is a base table and a second table is a restructuring view of the base table and may have been generated for faster query response, research, or the like. The restructuring view may have occurred naturally, or the base table may have been converted to the restructuring view using a series of operators and optionally, a middleware schema. The restructuring view maintenance system is preferably configured to monitor changes to the base table, including changes to data and to metadata. The maintenance system is configured to receive notification of a modification to a base table, investigate the modifications, and determine which operator(s) have been used to convert the base table to the restructuring view. For each modification to the base table, the system then determines, according to the type of modification and the type of transformation used, which of a selected group of actions to take to map the modification onto the restructuring view. The selected group of actions may include variously: insert, update, delete, rename relation, drop table, and rename column, according to the type of modification and the mapping of the relationship between the base table and the target table.

  Recently Added Patents
Liquid crystal display having wide viewing angle
Detection and use of low molecular-weight modulators of the cold-menthol receptor TRPM8
Scalable header extension
Selecting modulation and coding scheme in the presence of interference
Time sharing type autostereoscopic display apparatus and method for driving the same
Multi-function wrench for a power tool
  Randomly Featured Patents
Method of changing program of network node remote from network management system
Wheel conveyor
Methods to culture circovirus
Cooking appliance with self-contained weighing system
Automatic service provider notification of unauthorized terminal activity
Filament mower
Method of making a low electrical resistance connection between a metal and a high T.sub.c superconducting ceramic
Visual function testing device
Slope control device for an electric data transmission system
Use of chimeric CD4-src protein tyrosine kinases in drug screening and detection of an immune response