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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F12%3A10124130%21RIV13-GA0-11320___
rdf:type
skos:Concept n9:Vysledek
dcterms:description
XPath queries are usually translated into an algebra that combines traditional relational operators and XML-specific ones. In particular, FLWOR loops are represented using nest, unnest, join, and similar operators and their original nested-loop nature disappears, creating an opportunity for bulk evaluation and join reordering. In XQuery, two additional issues shall be handled -- tree construction and the presence of user-defined functions. The recursive nature of functions pushes the problem outside of the range of relational algebra. This book presents a novel evaluation framework based on an expanding network of relational operators, called R-program. In this environment, functions are evaluated in bulk instead of evaluating each call separately. Besides obvious advantages of bulk evaluation, R-programs also allow rearrangement of data flow across function boundaries. A set of program transformations employing these capabilities is described; together with rule-based static interprocedural analysis algorithms used to determine the applicability of the transformations. XPath queries are usually translated into an algebra that combines traditional relational operators and XML-specific ones. In particular, FLWOR loops are represented using nest, unnest, join, and similar operators and their original nested-loop nature disappears, creating an opportunity for bulk evaluation and join reordering. In XQuery, two additional issues shall be handled -- tree construction and the presence of user-defined functions. The recursive nature of functions pushes the problem outside of the range of relational algebra. This book presents a novel evaluation framework based on an expanding network of relational operators, called R-program. In this environment, functions are evaluated in bulk instead of evaluating each call separately. Besides obvious advantages of bulk evaluation, R-programs also allow rearrangement of data flow across function boundaries. A set of program transformations employing these capabilities is described; together with rule-based static interprocedural analysis algorithms used to determine the applicability of the transformations.
dcterms:title
Bulk Evaluation of XQuery Bulk Evaluation of XQuery
skos:prefLabel
Bulk Evaluation of XQuery Bulk Evaluation of XQuery
skos:notation
RIV/00216208:11320/12:10124130!RIV13-GA0-11320___
n9:predkladatel
n12:orjk%3A11320
n4:aktivita
n16:P
n4:aktivity
P(GAP202/10/0761)
n4:dodaniDat
n11:2013
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n7:7313136
n4:druhVysledku
n14:B
n4:duvernostUdaju
n21:S
n4:entitaPredkladatele
n18:predkladatel
n4:idSjednocenehoVysledku
125690
n4:idVysledku
RIV/00216208:11320/12:10124130
n4:jazykVysledku
n13:eng
n4:klicovaSlova
query evaluation; XQuery; XML
n4:klicoveSlovo
n5:query%20evaluation n5:XQuery n5:XML
n4:kontrolniKodProRIV
[00CF990E7548]
n4:mistoVydani
Germany
n4:nazevEdiceCisloSvazku
Neuveden
n4:nazevZdroje
Bulk Evaluation of XQuery
n4:obor
n15:IN
n4:pocetDomacichTvurcuVysledku
1
n4:pocetStranKnihy
172
n4:pocetTvurcuVysledku
1
n4:projekt
n20:GAP202%2F10%2F0761
n4:rokUplatneniVysledku
n11:2012
n4:tvurceVysledku
Bednárek, David
s:numberOfPages
172
n19:hasPublisher
LAP Lambert Academic Publishing
n8:isbn
978-3-659-27023-9
n10:organizacniJednotka
11320