363 search results - page 45 / 73 » Analyzing Plan Diagrams of Database Query Optimizers |
ICDE
2006
IEEE
14 years 10 months ago
2006
IEEE
The high quality, structured data from Web structured sources is invaluable for many applications. Hidden Web databases are not directly crawlable by Web search engines and are on...
DEXA
1995
Springer
14 years 18 days ago
1995
Springer
Abstract. The object-oriented database management systems store references to objects (implicit joins, precomputed joins), and use path expressions in query languages. One way of e...
ICDE
2008
IEEE
14 years 10 months ago
2008
IEEE
In this paper we explore database segmentation in the context of a column-store DBMS targeted at a scientific database. We present a novel hardware- and scheme-oblivious segmentati...
ICDE
2005
IEEE
14 years 2 months ago
2005
IEEE
Current federated systems deploy cost-based query optimization mechanisms; i.e., the optimizer selects a global query plan with the lowest cost to execute. Thus, cost functions in...
EDBT
2004
ACM
14 years 9 months ago
2004
ACM
We study the problem of answering queries over sources with limited access patterns. The problem is to decide whether a given query Q is feasible, i.e., equivalent to an executable...