Nested Queries and Quantifiers in an Ordered Context

Boston, Massachusetts March 30-April 02

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http://doi.ieeecomputersociety.org/10.1109/ICDE.2004.1320001

20th International Conference on Data ...

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	ASCII Text	x
	Norman May, Sven Helmer, Guido Moerkotte, "Nested Queries and Quantifiers in an Ordered Context," Data Engineering, International Conference on, pp. 239, 20th International Conference on Data Engineering (ICDE'04), 2004.

	BibTex	x
	@article{ 10.1109/ICDE.2004.1320001, author = {Norman May and Sven Helmer and Guido Moerkotte}, title = {Nested Queries and Quantifiers in an Ordered Context}, journal ={Data Engineering, International Conference on}, volume = {0}, year = {2004}, issn = {1063-6382}, pages = {239}, doi = {http://doi.ieeecomputersociety.org/10.1109/ICDE.2004.1320001}, publisher = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, }

	RefWorks Procite/RefMan/Endnote	x
	TY - CONF JO - Data Engineering, International Conference on TI - Nested Queries and Quantifiers in an Ordered Context SN - 1063-6382 SP EP A1 - Norman May, A1 - Sven Helmer, A1 - Guido Moerkotte, PY - 2004 KW - null VL - 0 JA - Data Engineering, International Conference on ER -

Norman May, Universit?t Mannheim, Germany

Sven Helmer, Universit?t Mannheim, Germany

Guido Moerkotte, Universit?t Mannheim, Germany

We present algebraic equivalences that allow to unnest nested algebraic expressions for order-preserving algebraic operators. We illustrate how these equivalences can be applied successfully to unnest nested queries given in the XQuery language. Measurements illustrate the performance gains possible by unnesting.

Citation:

Norman May, Sven Helmer, Guido Moerkotte, "Nested Queries and Quantifiers in an Ordered Context," icde, pp.239, 20th International Conference on Data Engineering (ICDE'04), 2004

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