XQuery on SQL Hosts

Grust, Torsten; Sakr, Sherif; Teubner, Jens

XQuery on SQL Hosts

Dateien

XQuery_on_SQL_Hosts_2004.pdfGröße: 258 KBDownloads: 394

Datum

2005

Autor:innen

Grust, Torsten

Sakr, Sherif

Teubner, Jens

URI (zitierfähiger Link)

http://nbn-resolving.de/urn:nbn:de:bsz:352-opus-16042

Link zur Lizenz

Urheberrechtlich geschützt

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Informatik und Informationswissenschaft

Publikationstyp

Beitrag zu einem Konferenzband

Publikationsstatus

Published

Erschienen in

Proc. of the 30th Conference on Very Large Databases (VLDB), Toronto, Canada, 2004. 2005

Zusammenfassung

Relational database systems may be turned into efficient XML and XPath processors if the system is provided with a suitable relational tree encoding. This paper extends this relational XML processing stack and shows that an RDBMS can also serve as a highly efficient XQuery runtime environment. Our approach is purely relational: XQuery expressions are compiled into SQL code which operates on the tree encoding. The core of the compilation procedure trades XQuery's notions of variable scopes and nested iteration (FLWOR blocks) for equi-joins. The resulting relational XQuery processor closely adheres to the language semantics, e.g., it obeys node identity as well as document and sequence order, and can support XQuery's full axis feature. The system exhibits quite promising performance figures in experiments. Somewhat unexpectedly, we will also see that the XQuery compiler can make good use of SQL's OLAP functionality.

Fachgebiet (DDC)

004 Informatik

Konferenz

Very Large Databases (VLDB), 2004, Toronto, Canada

Zitieren

ISO 690

GRUST, Torsten, Sherif SAKR, Jens TEUBNER, 2005. XQuery on SQL Hosts. Very Large Databases (VLDB). Toronto, Canada, 2004. In: Proc. of the 30th Conference on Very Large Databases (VLDB), Toronto, Canada, 2004. 2005

BibTex

@inproceedings{Grust2005XQuer-6260,
  year={2005},
  title={XQuery on SQL Hosts},
  booktitle={Proc. of the 30th Conference on Very Large Databases (VLDB), Toronto, Canada, 2004},
  author={Grust, Torsten and Sakr, Sherif and Teubner, Jens}
}

RDF

<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/6260">
    <dcterms:bibliographicCitation>First publ. in: Proc. of the 30th Conference on Very Large Databases (VLDB), Toronto, Canada,  2004</dcterms:bibliographicCitation>
    <dcterms:abstract xml:lang="eng">Relational database systems may be turned into efficient XML and XPath processors if the system is provided with a suitable relational tree encoding. This paper extends this relational XML processing stack and shows that an RDBMS can also serve as a highly efficient XQuery runtime environment. Our approach is purely relational: XQuery expressions are compiled into SQL code which operates on the tree encoding. The core of the compilation procedure trades XQuery's notions of variable scopes and nested iteration (FLWOR blocks) for equi-joins. The resulting relational XQuery processor closely adheres to the language semantics, e.g., it obeys node identity as well as document and sequence order, and can support XQuery's full axis feature. The system exhibits quite promising performance figures in experiments. Somewhat unexpectedly, we will also see that the XQuery compiler can make good use of SQL's OLAP functionality.</dcterms:abstract>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T16:10:34Z</dcterms:available>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T16:10:34Z</dc:date>
    <dc:creator>Teubner, Jens</dc:creator>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dcterms:issued>2005</dcterms:issued>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/36"/>
    <dc:rights>terms-of-use</dc:rights>
    <dc:format>application/pdf</dc:format>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/6260/1/XQuery_on_SQL_Hosts_2004.pdf"/>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/6260"/>
    <dcterms:title>XQuery on SQL Hosts</dcterms:title>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/6260/1/XQuery_on_SQL_Hosts_2004.pdf"/>
    <dc:contributor>Sakr, Sherif</dc:contributor>
    <dc:contributor>Teubner, Jens</dc:contributor>
    <dc:contributor>Grust, Torsten</dc:contributor>
    <dc:language>eng</dc:language>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/36"/>
    <dc:creator>Grust, Torsten</dc:creator>
    <dc:creator>Sakr, Sherif</dc:creator>
  </rdf:Description>
</rdf:RDF>