Sciweavers

Share
VLDB
2002
ACM
126views Database» more  VLDB 2002»
9 years 11 months ago
Plan Selection Based on Query Clustering
Query optimization is a computationally intensive process, especially for complex queries. We present here a tool, called PLASTIC, that can be used by query optimizers to amortize...
Antara Ghosh, Jignashu Parikh, Vibhuti S. Sengar, ...
VLDB
2005
ACM
139views Database» more  VLDB 2005»
10 years 5 months ago
Analyzing Plan Diagrams of Database Query Optimizers
A “plan diagram” is a pictorial enumeration of the execution plan choices of a database query optimizer over the relational selectivity space. In this paper, we present and an...
Naveen Reddy, Jayant R. Haritsa
SIGMOD
2005
ACM
174views Database» more  SIGMOD 2005»
10 years 5 months ago
Automated statistics collection in action
If presented with inaccurate statistics, even the most sophisticated query optimizers make mistakes. They may wrongly estimate the output cardinality of a certain operation and th...
Peter J. Haas, Mokhtar Kandil, Alberto Lerner, Vol...
books