DATABASE MANAGEMENT SYSTEM, COMPUTER, AND DATABASE

专利名称：DATABASE MANAGEMENT SYSTEM,

COMPUTER, AND DATABASE MANAGEMENTMETHOD

发明人：Seisuke Tokuda,Akira Shimizu,Michiko

Yoshida,Shinji Fujiwara,Kazuhiko Mogi,MasaruKitsuregawa,Kazuo Goda

申请号：US14397030申请日：20120427

公开号：US20150112965A1公开日：20150423

专利附图：

摘要：A database management system (DBMS) generates a query execution planincluding information representing one or more database (DB) operations necessary forexecuting a query, and executes the query in accordance with the query execution plan. Inthe execution of the query, the DBMS dynamically generates tasks for executing the DBoperations and executes the dynamically generated tasks. The query execution planincludes a plurality of query blocks, which are sets of one or more DB operations. Whennewly generating a task, the DBMS executes determination processing of simultaneous-task-generation number. The determination processing of simultaneous-task-generationnumber is to calculate, targeting each of the query blocks, the number of simultaneoustask generation, which is the number of tasks simultaneously generatable as tasks forexecuting the query block. The number of the dynamically generated tasks is equal to orsmaller than the number of simultaneous task generation.

申请人：Seisuke Tokuda,Akira Shimizu,Michiko Yoshida,Shinji Fujiwara,KazuhikoMogi,Masaru Kitsuregawa,Kazuo Goda

地址：Tokyo JP,Tokyo JP,Tokyo JP,Tokyo JP,Tokyo JP,Tokyo JP,Tokyo JP

国籍：JP,JP,JP,JP,JP,JP,JP

更多信息请下载全文后查看