964 search results - page 87 / 193 » Efficiently Ordering Query Plans for Data Integration |
181
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VLDB
2001
ACM
15 years 9 months ago
2001
ACM
Most modern DBMS optimizers rely upon a cost model to choose the best query execution plan (QEP) for any given query. Cost estimates are heavily dependent upon the optimizer’s e...
141
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ICEIS
2009
IEEE
15 years 11 months ago
2009
IEEE
Today XML is an essential technology for knowledge management within enterprises and dissemination of data over the Web. Therefore the efficient evaluation of XML queries has been ...
134
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SIGMOD
2003
ACM
16 years 4 months ago
2003
ACM
XML databases often contain documents comprising structured text. Therefore, it is important to integrate "information retrieval style" query evaluation, which is well-s...
137
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VLDB
1998
ACM
15 years 9 months ago
1998
ACM
Currently the key problems of query optimization are extensibility imposed by object-relational technology, as well as query complexity caused by forthcoming applications, such as...
172
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COMGEO
2008
ACM
15 years 4 months ago
2008
ACM
Given a planar polygonal subdivision S, the point location problem is to preprocess S into a data structure so that the cell of the subdivision that contains a given query point c...