Inventor
SHIBAMIYA AKIRA
US16 patents
Patents
16 patentsUS6272487B1Aug 7, 2001
Query optimization through the use of multi-column statistics to avoid the problems of non-indexed column correlation
IBM125 citations99
US4956774ASep 11, 1990
Data base optimizer using most frequency values statistics
IBM226 citations98
US5940819AAug 17, 1999
User specification of query access paths in a relational database management system
IBM98 citations97
US5995957ANov 30, 1999
Query optimization through the use of multi-column statistics to avoid the problems of column correlation
IBM74 citations96
US5692174ANov 25, 1997
Query parallelism in a shared data DBMS system
IBM165 citations96
US5043872AAug 27, 1991
Access path optimization using degrees of clustering
IBM93 citations96
US7146365B2Dec 5, 2006
Method, system, and program for optimizing database query execution
IBM65 citations94
US6535893B1Mar 18, 2003
Method for estimating the elapsed time required for a log apply process
IBM29 citations92
US5845274ADec 1, 1998
Computer program product for avoiding complete index tree traversals in sequential and almost sequential index probes
IBM32 citations92
US5748952AMay 5, 1998
System and method for avoiding complete index tree traversals in sequential and almost sequential index probes
IBM20 citations92
US6334134B1Dec 25, 2001
Insert performance on a multi-system transaction environment
IBM33 citations91
US7146360B2Dec 5, 2006
Method and system for improving response time for database query execution
IBM20 citations89
US7058952B1Jun 6, 2006
Technique for determining an optimal number of tasks in a parallel database loading system with memory constraints
IBM7 citations73
US7792825B2Sep 7, 2010
Fast select for fetch first N rows with order by
IBM6 citations58
US7225209B2May 29, 2007
Computer-implemented method for allocating new additional area for the dataset in storage based on the size of the new additional area wherein if the new area number does not exceed clipping threshold, the size of a new additional area being greater than the size of each previously allocated additional area of the dataset
IBM3 citations58
US6823326B2Nov 23, 2004
Method and system for performing asynchronous preformatting in a database system
IBM0 citations51