Resources Contact Us Home
Restructuring view maintenance system and method

Image Number 10 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
Powder for layerwise manufacturing of objects
Contact lens material
RPM Controlled Wind Power Generation System
Adaptive take-off strips for smoothing ink consumption
Image processing apparatus capable of using replacement component, image forming apparatus capable of using replacement component, and method of administrating replacement component
LED-array package
  Randomly Featured Patents
Reciprocating compressor
Valve assembly for brake fluid pressure control
Method for making bus and post electrical connector using displaced bus material and connector produced thereby
Preparation of factor IX
Jitter estimation for MPEG receivers
Dispenser for medicaments and method and apparatus for making same
Methods utilizing delayed dilution, mixing, and filtration for providing customized beverages on demand
Lamp fixing and mounting device
Thermosetting resin composition of an allylated novolak and a bis-maleimide
Density modification device