439 search results - page 2 / 88 » Unnesting Arbitrary Queries |
ICDE
2006
IEEE
14 years 6 months ago
2006
IEEE
The XPath language incorporates powerful primitives for formulating queries containing nested subexpressions which are existentially or universally quantified. However, even the b...
VLDB
1992
ACM
13 years 8 months ago
1992
ACM
ICDM
2002
IEEE
13 years 9 months ago
2002
IEEE
Previous works on automatic query clustering most generate a flat, un-nested partition of query terms. In this work, we are pursuing to organize query terms into a hierarchical s...
PVLDB
2010
12 years 11 months ago
2010
A RkNN query returns all objects whose nearest k neighbors contain the query object. In this paper, we consider RkNN query processing in the case where the distances between attri...
ICDE
2010
IEEE
13 years 2 months ago
2010
IEEE
In this paper, we propose the Hybrid-Layer Index (simply, the HL-index) that is designed to answer top-k queries efficiently when the queries are expressed on any arbitrary subset ...