Patent
System and method for querying xml streams
Marcus Fontoura,Vanja Josifovsld +1 more
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TLDR
In this paper, a system and method for querying a stream of XML data in a single pass using standard XQuery expressions is presented, consisting of an expression parser that receives a query and generates a parse tree; a SAX events API that receives the stream of XQuery data and generates an evaluator that receives parse trees and stream of events and buffers fragments from the stream.Abstract:
A system and method for querying a stream of XML data in a single pass using standard XQuery expressions. The system comprises: an expression parser that receives a query and generates a parse tree; a SAX events API that receives the stream of XML data and generates a stream of SAX events; an evaluator that receives the parse tree and stream of SAX events and buffers fragments from the stream of SAX events that meet an evaluation criteria; and a tuple constructor that joins fragments to form a set of tuple results that satisfies the query for the stream of XML data.read more
Citations
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TL;DR: In this article, a query specifies a set of operations to be performed on a markup language data source and a second set of one or more operations on a second data source, and results are generated for the query based at least in part on the results of performing the first set of operation.
References
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Proceedings Article
Relational Databases for Querying XML Documents: Limitations and Opportunities
Jayavel Shanmugasundaram,Kristin Tufte,Chun Zhang,Gang He,David J. DeWitt,Jeffrey F. Naughton +5 more
TL;DR: It turns out that the relational approach can handle most (but not all) of the semantics of semi-structured queries over XML data, but is likely to be effective only in some cases.
Patent
Method and apparatus for processing markup language specifications for data and metadata used inside multiple related internet documents to navigate, query and manipulate information from a plurality of object relational databases over the web
TL;DR: In this paper, the authors present a system for navigation through multiple documents in Extensible Markup Language and Resource Description Framework to inspect data/metadata in order to either start a transaction on selected item(s) in separate thin client window(s), with persistent connectivity through Internet Inter ORB Protocol or implicitly trigger read-only queries in Structured Query Language (SQL) represented in RDF against a unified virtual Database defined over multiple physical disparate object relational databases over the web.
Patent
Apparatus and method for decomposing database queries for database management system including multiprocessor digital data processing system
TL;DR: In this paper, an improved system for database query processing by means of "query decomposition" intercepts database queries prior to processing by a database management system ("DBMS") is presented.
Proceedings Article
Query Optimization by Predicate Move-Around
TL;DR: Query optimization which is done by making a graph of the query and moving predicates around in the graph so that they will be applied early in the optimized query generated from the graph.
Patent
Tagging XML query results over relational DBMSs
TL;DR: In this paper, an XML query is parsed and transformed into a language-neutral intermediate representation, which is a sequence of operations describing how the output document is derived from the underlying relational tables.