Invention Grant
US07991796B2 System and program for implementing scrollable cursors in a distributed database system
失效
在分布式数据库系统中实现可滚动光标的系统和程序
- Patent Title: System and program for implementing scrollable cursors in a distributed database system
- Patent Title (中): 在分布式数据库系统中实现可滚动光标的系统和程序
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Application No.: US12348818Application Date: 2009-01-05
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Publication No.: US07991796B2Publication Date: 2011-08-02
- Inventor: Curt Lee Cotner , Margaret A. Dong
- Applicant: Curt Lee Cotner , Margaret A. Dong
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Konrad Raynes & Victor LLP
- Agent Rabindranath Dutta
- Main IPC: G06F17/30
- IPC: G06F17/30

Abstract:
Provided are a system and program for accessing data in a distributed database environment. A client program receives multiple requests for data from a database object satisfying specified search predicates from an application program. Each request includes a request for at least one row from the table. The client program transfers a database command and a rowset parameter indicating a maximum number of rows to return to a server program over a network if the requested row is not maintained by the client program. A data block is generated with the server program including rows from the database object satisfying the search predicates in response to the database command. The rows included in the data block do not exceed the rowset parameter. The server program transfers the data block to the client program. In turn, the client program returns at least one requested row from the received data block in response to one request for the at least one row of data from the application program.
Public/Granted literature
- US20090112886A1 SYSTEM AND PROGRAM FOR IMPLEMENTING SCROLLABLE CURSORS IN A DISTRIBUTED DATABASE SYSTEM Public/Granted day:2009-04-30
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