Parallel database management method and parallel database management system

A parallel database management system comprising:

• a request reception server for receiving a request from a user;
• and
• a plurality of execution servers for parallelly executing database processing appropriate to the request from the user in response to an instruction from said request reception server,
• wherein said request reception server executes a plug-in module for acquiring input information to acquire the input information, and said execution servers execute plug-in modules using said input information.

A database management method in a database management system including a request reception server and a plurality of execution servers, comprising the steps of:

• receiving a processing request from a user at said request reception server;
• determining, by analyzing said processing request in said request reception server, whether or not currently unidentified input information is required after said plurality of execution servers have initiated parallel executions of an execution processing procedure code appropriate to said processing request;
• previously acquiring said input information in said request reception server when determining that said execution servers require said input information;
• creating in said request reception server said execution processing procedure code assuming that said currently unidentified input information has already been inputted;
• and
• passing said execution processing procedure code together with said acquired input information from said request reception server to said plurality of execution servers.

A method of processing a request from a user in a database management system including a request reception server and a plurality of execution servers, said request reception servers and said execution servers each having a plug-in program module incorporated by the user, said method comprising the steps executed by said request reception server of:

• receiving a processing request from the user;
• determining, by analyzing said processing request from the user, whether or not plug-in program modules requiring currently unidentified input information are executed in said plurality of execution servers after said plurality of execution servers have initiated parallel executions of an execution processing procedure code appropriate to said processing request, based on a definition information table created from descriptions of interface specifications related to said plug-in program modules;
• previously acquiring said currently unidentified input information by executing a plug-in program module in said request reception server when determining that the plug-in program modules requiring said currently unidentified input information are executed in said execution servers;
• creating said execution processing procedure code assuming that said input information has already been inputted;
• and
• passing said execution processing procedure code together with said acquired input information from said request reception server to said plurality of execution servers.

A request reception server in a database management system including said request reception server and a plurality of execution servers, said request reception servers and said execution servers each having a plug-in program module incorporated by the user, said request reception server comprising:

• a processing unit for receiving a processing request from the user;
• a processing unit for determining, by analyzing said processing request from the user, whether or not plug-in program modules requiring currently unidentified input information are executed in said plurality of execution servers after said plurality of execution servers have initiated parallel executions of an execution processing procedure code appropriate to said processing request, based on a definition information table created from descriptions of interface specifications related to said plug-in program modules;
• a processing unit for previously acquiring said currently unidentified input information by executing a plug-in program module in said request reception server when determining that the plug-in program modules requiring said currently unidentified input information are executed in said execution servers;
• a processing unit for creating said execution processing procedure code assuming that said input information has already been inputted;
• and
• a processing unit for passing said execution processing procedure code together with said acquired input information from said request reception server to said plurality of execution servers.

A database system comprising:

• a client connected to a communication path for issuing a processing request from a user in response to a query of the user;
• a request reception server connected to said communication path for receiving said processing request from said client, said request reception server including a plug-in program module incorporated by the user;
• a plurality of execution servers connected to said communication path for parallelly executing an execution processing procedure code appropriate to said processing request, said plurality of execution server each including a plug-in program module incorporated by the user;
• a definition registering server connected to said communication path, said definition registering server including a storage device for storing descriptions of interface specifications related to said plug-in program modules in said request reception server and said plurality of execution servers, and a definition registering tool for creating, from said description of the interface specifications, a definition information table required for determining whether or not the plug-in program modules in said plurality of execution servers require currently unidentified input information after said plurality of execution servers have initiated parallel executions of said execution processing procedure code;
• and
• a dictionary server connected to said communication path, and including a storage device for storing said definition information table, and a definition information management unit for managing said definition information table,
• said request reception server including:
• a processing unit for analyzing said processing request received from said client to determine whether or not currently unidentified input information is required when said plurality of execution servers execute said plug-in program modules, based on said definition information table retrieved by accessing said dictionary server;
• a processing unit for previously acquiring said input information from said dictionary server by executing a plug-in program module in said request reception server when determining that the executions of the plug-in program modules in said plurality of execution servers require said currently unidentified input information;
• a processing unit for creating said execution processing procedure code assuming that said input information has already been inputted;
• a processing unit for passing said execution processing procedure code together with said acquired input information from said request reception server to said plurality of execution servers;
• and
• a processing unit for receiving an execution result of said execution processing procedure code by said plurality of execution servers and holding said execution result in a holding unit.

A definition registering node in a database management system, said definition registering node connected to a communication path, said database management system comprising:

• a request reception server connected to said communication path for receiving a processing request from a user, said request reception server including a plug-in program module incorporated by the user;
• a plurality of execution servers connected to said communication path for parallelly executing an execution processing procedure code appropriate to said processing request, said plurality of execution servers each including a plug-in program module incorporated by the user;
• and
• a dictionary server connected to said communication path, and including a storage device for storing definition information, and a definition information management unit for managing said definition information,
• wherein said definition registering node including a storage device for storing descriptions of interface specifications related to said plug-in program modules in said request reception server and said plurality of execution servers, and a definition registering tool for creating, from said description of the interface specifications, a definition information table required for determining whether or not plug-in program modules requiring currently unidentified input information are executed in said execution servers after said plurality of execution servers have initiated parallel executions of said execution processing procedure code;
• said definition registering tool accesses said dictionary server, and instructs said definition information management unit to register said definition information table in said storage device in said dictionary server;
• and
• said request reception server analyzes said processing request, and executes said program module in said request receiver server to previously acquire said input information from said dictionary server when said request reception server determines, based on said definition information table retrieved by accessing said dictionary server, that the executions of said plug-in program modules require currently unidentified input information after said plurality of execution servers have initiated the parallel executions of said execution processing procedure code.

A storage medium readable by a request reception server in a database management system including said request reception server and a plurality of execution servers, said storage medium encoding a computer process comprising:

• a processing portion for receiving a processing request from a user;
• a processing portion for determining, by analyzing said processing request from the user, whether or not said plurality of execution servers require currently unidentified input information after said plurality of execution servers have initiated parallel executions of a execution processing procedure code appropriate to said processing request;
• a processing portion for previously acquiring said input information when determining that said plurality of execution servers require said input information;
• a processing portion for creating said execution processing procedure code assuming that said input information has already been inputted;
• and
• a processing portion for passing said execution processing procedure code together with said input information from said request reception server to said plurality of execution servers.

A storage medium readable by a request reception server in a database management system including said request reception server and a plurality of execution servers, each having a plug-in program module incorporated by a user, said recording medium encoding a computer process comprising:

• a processing portion for receiving a processing request from the user;
• a processing portion for determining, by analyzing said processing request, whether or not plug-in modules requiring currently unidentified input information are executed in said plurality of execution servers after said plurality of execution servers have initiated parallel executions of an execution processing procedure code appropriate to said processing request, based on a definition information table created from descriptions of interface specifications for said plug-in program modules;
• a processing portion for previously acquiring said input information by executing said plug-in program module in said request reception server, when determining that said plug-in program modules in said plurality of execution servers require said currently unidentified input information;
• a processing portion for creating said execution processing procedure code assuming that said input information has already been inputted;
• and
• a processing portion for passing said execution processing procedure code together with said acquired input information from said request reception server to said plurality of execution servers.