363 search results - page 43 / 73 » Analyzing Plan Diagrams of Database Query Optimizers |
ICDE
2007
IEEE
14 years 3 months ago
2007
IEEE
Main memory is a critical resource when processing non-blocking queries with state intensive operators that require real-time responses. While partitioned parallel processing can ...
ICDE
2000
IEEE
14 years 10 months ago
2000
IEEE
Execution plans produced by traditional query optimizers for data integration queries may yield poor performance for several reasons. The cost estimates may be inaccurate, the mem...
SIGMOD
2002
ACM
13 years 8 months ago
2002
ACM
Traditional query processors generate full, accurate query results, either in batch or in pipelined fashion. We argue that this strict model is too rigid for exploratory queries o...
VLDB
2005
ACM
14 years 2 months ago
2005
ACM
Cost-based query optimizers need to estimate the selectivity of conjunctive predicates when comparing alternative query execution plans. To this end, advanced optimizers use multi...
ICDE
2007
IEEE
14 years 3 months ago
2007
IEEE
Existing index selection tools rely on heuristics to efficiently search within the large space of alternative solutions and to minimize the overhead of using the query optimizer ...