Inventor
KOSTAMAA OLLI PEKKA
US19 patents
⚠️ This page may combine multiple inventors who share the name “KOSTAMAA OLLI PEKKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
XU YU
8 patentsUS8600994B1Dec 3, 2013
Performing an outer join between a small table and a large table
XU YU27 citations92
US8150836B2Apr 3, 2012
System, method, and computer-readable medium for reducing row redistribution costs for parallel join operations
XU YU11 citations84
US8510280B2Aug 13, 2013
System, method, and computer-readable medium for dynamic detection and management of data skew in parallel join operations
XU YU4 citations63
US8234268B2Jul 31, 2012
System, method, and computer-readable medium for optimizing processing of distinct and aggregation queries on skewed data in a database system
XU YU5 citations62
US8938444B2Jan 20, 2015
Techniques for external application-directed data partitioning in data exporting from a database management system
XU YU1 citations52
US8712994B2Apr 29, 2014
Techniques for accessing a parallel database system via external programs using vertical and/or horizontal partitioning
XU YU0 citations52
US8126905B2Feb 28, 2012
System, method, and computer-readable medium for optimizing the performance of outer joins
XU YU1 citations52
US8234292B2Jul 31, 2012
System, method, and computer-readable medium for optimizing processing of queries featuring maximum or minimum equality conditions in a parallel processing system
XU YU0 citations41
TERADATA US INC
4 patentsUS7386536B1Jun 10, 2008
Statistical representation of skewed data
TERADATA US INC15 citations84
US9336270B2May 10, 2016
Techniques for accessing a parallel database system via external programs using vertical and/or horizontal partitioning
TERADATA US INC3 citations73
US7870123B2Jan 11, 2011
Database optimizer plan validation and characterizations
TERADATA US INC2 citations60
US9424260B2Aug 23, 2016
Techniques for data assignment from an external distributed file system to a database management system
TERADATA US INC0 citations52
NCR CORP
3 patentsUS5864842AJan 26, 1999
Optimization of SQL queries using hash star join operations
NCR CORP181 citations97
US6618729B1Sep 9, 2003
Optimization of a star join operation using a bitmap index structure
NCR CORP70 citations91
US6704724B1Mar 9, 2004
Parallel optimizer hints with a direct manipulation user interface
NCR CORP37 citations86
ZHOU XIN
2 patentsUS8832074B2Sep 9, 2014
System, method and computer-readable medium for dynamic skew avoidance for generic queries
ZHOU XIN5 citations73
US8099409B2Jan 17, 2012
System, method, and computer-readable medium for duplication optimization for parallel join operations on similarly large skewed tables
ZHOU XIN2 citations62