363 search results - page 1 / 73 » Analyzing Plan Diagrams of Database Query Optimizers |
VLDB
2005
ACM
13 years 9 months ago
2005
ACM
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...
PVLDB
2008
13 years 3 months ago
2008
Estimates of predicate selectivities by database query optimizers often differ significantly from those actually encountered during query execution, leading to poor plan choices a...
VLDB
2007
ACM
14 years 4 months ago
2007
ACM
A "plan diagram" is a pictorial enumeration of the execution plan choices of a database query optimizer over the relational selectivity space. We have shown recently tha...
SIGMOD
1998
ACM
13 years 8 months ago
1998
ACM
VLDB
1998
ACM
13 years 8 months ago
1998
ACM
Query optimizers normally compile queries into one optimal plan by assuming complete knowledge of all cost parameters such asselectivity and resourceavailability. The execution of...