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EDBT
2012
ACM
214views Database» more  EDBT 2012»
11 years 10 months ago
An optimization framework for map-reduce queries
We present an effective optimization framework for general SQLlike map-reduce queries, which is based on a novel query algebra and uses a small number of higher-order physical ope...
Leonidas Fegaras, Chengkai Li, Upa Gupta
PPDP
2010
Springer
13 years 6 months ago
Deriving predicate statistics in datalog
Database query optimizers rely on data statistics in selecting query execution plans. Similar query optimization techniques are desirable for deductive databases and, to make this...
Senlin Liang, Michael Kifer
FQAS
2006
Springer
94views Database» more  FQAS 2006»
13 years 11 months ago
Term Disambiguation in Natural Language Query for XML
Converting a natural language query sentence into a formal database query is a major challenge. We have constructed NaLIX, a natural language interface for querying XML data. Throu...
Yunyao Li, Huahai Yang, H. V. Jagadish
OODBS
2000
147views Database» more  OODBS 2000»
13 years 11 months ago
Towards a Unified Query-by-Example (UQBE): UML as a Basis for a Generic Graphical Query Language
A generic graphical query language for ODMG-compliant object databases is proposed, based on the ideas of Query-By-Example, and using UML-like diagrams as schema notation. Ease of ...
Miguel Ángel Sicilia Urbán, Elena Ga...
DASFAA
2005
IEEE
149views Database» more  DASFAA 2005»
14 years 1 months ago
Translate Graphical XML Query Language to SQLX
: Semi-structured data has become more and more attention-getting with the emergence of XML, and it has aroused much enthusiasm for integrating XML and SQL in database community. D...
Wei Ni, Tok Wang Ling