363 search results - page 31 / 73 » Analyzing Plan Diagrams of Database Query Optimizers |
ICDE
2006
IEEE
14 years 3 months ago
2006
IEEE
In this paper, we study SQL queries with aggregate subqueries that share common tables and conditions with the outer query. While several approaches can deal with such queries, th...
SIGMOD
2009
ACM
14 years 9 months ago
2009
ACM
Composite (or Complex) event processing (CEP) systems search sequences of incoming events for occurrences of userspecified event patterns. Recently, they have gained more attentio...
SIGMOD
2004
ACM
14 years 9 months ago
2004
ACM
Ranking is an important property that needs to be fully supported by current relational query engines. Recently, several rank-join query operators have been proposed based on rank...
ICDE
2008
IEEE
14 years 10 months ago
2008
IEEE
Abstract-- Our demonstration introduces a novel system architecture which massively facilitates optimization in data stream management systems (DSMS). The basic idea is to decouple...
ICDE
2011
IEEE
13 years 13 days ago
2011
IEEE
— In this paper, we study the problem of efficiently computing multiple aggregation queries over a data stream. In order to share computation, prior proposals have suggested ins...