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Extensions to SQL for historical databases

N.L. Sarda
1990 IEEE Transactions on Knowledge and Data Engineering  
The popular query langauge SQL has been extended for definition, retrieval, and update of historical relations. The extended SQL, called HSQL, is a superset of SQL.  ...  Index Terms-Data models, database management, historical database, modeling of time, query languages, relational algebra, relational model, SQL.  ...  HSQL: SQL EXTENDED FOR HISTORICAL DATABASES HSQL is a superset of the popular query language SQL [3] , [6] .  ... 
doi:10.1109/69.54721 fatcat:mgjpr25vy5fi5cpfapgciqissu

Literature survey of temporal data models

2017 International Journal of Latest Trends in Engineering and Technology  
Sarda [24] designed a temporal data model incorporating HSQL, which is a calculus based valid-time query language. Objects in this model are characterized as snapshots or valid time relations.  ...  It endorse the storage and retrieval of data using a query language, TOSQL.  ... 
doi:10.21172/1.841.47 fatcat:odbedlm2zrabrkqf3xnjroei5q

Coalescing in Temporal Databases

Michael H. Böhlen, Richard T. Snodgrass, Michael D. Soo
1996 Very Large Data Bases Conference  
, and summarize a performance study involving a subset of these algorithms.  ...  We propose a spectrum of coalescing algorithms within a DBMS, based on nested-loop, explicit partitioning, explicit sorting, temporal sorting, temporal partitioning, and combined explicit/temporal sorting  ...  Acknowledgments The second and third authors were supported in part by NSF grant ISI-and a grant from the AT&T Foundation.  ... 
dblp:conf/vldb/BohlenSS96 fatcat:2cq6pqwbmzddtla3rgn75asivu

The Development of Ordered SQL Packages to Support Data Warehousing

Wilfred Ng, Mark Levene
2001 Journal of Database Management  
We propose that the capabilities of database languages should be enhanced to manipulate user-defined data orderings, since business queries in an enterprise usually involve order.  ...  We have already defined and implemented a minimal extension of SQL, called OSQL, which allows querying over ordered relational databases.  ...  As a result, their queries over the database are sometimes fuzzy in nature due to the ambiguity of natural languages.  ... 
doi:10.4018/jdm.2001100103 fatcat:djheqmtginf5bo7k33om6zpt4e

Ontop: Answering SPARQL queries over relational databases

Diego Calvanese, Benjamin Cogrel, Sarah Komla-Ebri, Roman Kontchakov, Davide Lanti, Martin Rezk, Mariano Rodriguez-Muro, Guohui Xiao, Óscar Corcho
2016 Semantic Web Journal  
We present Ontop, an open-source Ontology-Based Data Access (OBDA) system that allows for querying relational data sources through a conceptual representation of the domain of interest, provided in terms  ...  Key features of Ontop are its solid theoretical foundations, a virtual approach to OBDA, which avoids materializing triples and is implemented through the query rewriting technique, extensive optimizations  ...  Ontop supports two mapping languages: the W3C RDB2RDF Mapping Language (R2RML), which is a widely used standard; and the native Ontop mapping language, which is easier to learn and use.  ... 
doi:10.3233/sw-160217 fatcat:mjwgfop5tvfvpf3rr6flpfvmwq

A Mathematical Model for Comparing Memory Storage of Three Interval-Based Parametric Temporal Database Models

Nashwan Alromema, Mohd Shafry, Ibrahim Albidewi
2017 International Journal of Advanced Computer Science and Applications  
Interval-Based Parametric Temporal Database Model (IBPTDM) captures the historical changes of database object in single tuple.  ...  The reason behind that, IBPTDM cannot directly use relational storage structure or query evaluation technique that depends on atomic attribute values as well as it is unfixed attribute size. 1NF model  ...  The bitemporal conceptual data model (BCDM) is another example of such approach that forms the basis for the temporal structured query language (TSQL) proposed by Jensen [5] .  ... 
doi:10.14569/ijacsa.2017.080741 fatcat:uax5bgjxkvebvmuh2fn2awrene

Stix

Giacomo Bernardi, Matt Calder, Damon Fenacci, Alex Macmillan, Mahesh K. Marina
2010 Proceedings of the sixteenth annual international conference on Mobile computing and networking - MobiCom '10  
Stix is a platform managing emerging large-scale broadband wireless access (BWA) networks.  ...  We implement the Stix system on embedded boards and show that the implementation has a low memory footprint.  ...  Our implementation of the Storage Manager uses the HSQL database.  ... 
doi:10.1145/1859995.1860024 dblp:conf/mobicom/BernardiCFMM10 fatcat:gxnzz7opx5cdpequafa645xn5m

Policy Chain for Securing Service Oriented Architectures [chapter]

Wihem Arsac, Annett Laube, Henrik Plate
2013 Lecture Notes in Computer Science  
This paper summarizes a novel approach of a policy chain, which links high-level, abstract and declarative security policies on one side and low-level, imperative, and technical security configuration  ...  The paper describes detailed an architecture linking several applications and models via state-machines in order to provide a toolset supporting service providers to build such a holistic policy chain  ...  , change propagation on the basis of defined state-machines, access control, as well as an Object Constraint Language (OCL) and Hibernate SQL (hSQL)-based query interface.  ... 
doi:10.1007/978-3-642-35890-6_22 fatcat:f42n57wukbajjppru65jeol2ae

Empirical Analysis of Recent Advances, Characteristics and Challenges of Big Data

Burhanullah Khattak, Aurangzeb Khan, Khairullah Khan, Wahab Khan, Muhammad Kamran, Muhammad Fahad
2018 EAI Endorsed Transactions on Scalable Information Systems  
The primary objective of this empirical analysis is to present a broad-spectrum perspective of this emerging research area with the goal to present big data related concepts in a coherent manner to the  ...  In addition, we investigated and reported a detailed empirical analysis of the most recent management tools like Hadoop and MapReduce, along with their different components, usage, and limitation.  ...  JAQL JAQL [96] is a declarative language on top of Hadoop that presents a query language and are effectively used for huge data processing. It translates top-level queries into MapReduce jobs.  ... 
doi:10.4108/eai.13-7-2018.159621 fatcat:wukpkji5cfgqlp47ucc6ugubdy

The TSQL2 Data Model [chapter]

Christian S. Jensen, Richard T. Snodgrass, Michael D. Soo
1995 The TSQL2 Temporal Query Language  
Curtis Dyreson and Nick Kline provided helpful comments on a previous draft.  ...  A data model can be said to consist of a query language, objects manipulated by the query language, an update language for updating the objects, and a mechanism for specifying integrity constraints.  ...  Sarda Sarda's data model and associated algebra [Sar90a] were designed to support the calculusbased query language HSQL [Sar90b] . This model associates valid time with tuples.  ... 
doi:10.1007/978-1-4615-2289-8_10 fatcat:qickish7ljd5nc4ln2fbrjpppy

Visual query operators for temporal databases

S. Fernandes, U. Schiel, T. Catarci
Proceedings of TIME '97: 4th International Workshop on Temporal Representation and Reasoning  
While attempting to meet this need, we propose a visual query system for temporal databses.  ...  Many recent proposals in the literature present easyto-use query languages, based on visual representations of the database and direct manipulation mechanisms.  ...  This paper presents a visual query language for historical databases (TVQOs, Temporal Visual Query Operators), based on a temporal extension of the Graph Model [3] , [5] , [7] .  ... 
doi:10.1109/time.1997.600781 dblp:conf/time/SilvaSC97 fatcat:g4aethu2bvazbovcjdmqtgr244

Intelligent visualization and exploration of time-oriented data of multiple patients

Denis Klimov, Yuval Shahar, Meirav Taieb-Maimon
2010 Artificial Intelligence in Medicine  
The main difference between the OBTAIN specification language and the previous pure time-oriented query languages, such as TSQL [21] , HSQL [22] , TSQL2 [23] , GCH-OSQL [24] [25] [26] , TLSQL [27]  ...  most of the query languages mentioned above.  ...  Appendix A.  ... 
doi:10.1016/j.artmed.2010.02.001 pmid:20303245 fatcat:mcnn4v26mnh45c6dzpedq3sa6e

Design and Evaluation of Opal2: A Toolkit for Scientific Software as a Service

Sriram Krishnan, Luca Clementi, Jingyuan Ren, Philip Papadopoulos, Wilfred Li
2009 2009 Congress on Services - I  
Opal2 is a toolkit for wrapping scientific applications as Web services on Grid and cloud computing resources.  ...  We analyze its performance in typical cluster and Grid settings, and in a cloud computing environment within virtual machines, using Amazon's Elastic Computing Cloud (EC2).  ...  Hibernate provides a powerful, high performance object/relational persistence and query service.  ... 
doi:10.1109/services-i.2009.52 dblp:conf/services/KrishnanCRPL09 fatcat:37yg2fky6bg43kx3ee3w2ssipa

A history of Haskell

Paul Hudak, John Hughes, Simon Peyton Jones, Philip Wadler
2007 Proceedings of the third ACM SIGPLAN conference on History of programming languages - HOPL III  
The members of the Haskell Committee played a particularly important role, however.  ...  Here they are, with their affiliations during the lifetime of the committee, and identifying those who served as Editor for some iteration of the language: Arvind (MIT), Lennart Augustsson (Chalmers University  ...  The LINQ (Language INtegrated Query) features of C# 3.0 and Visual Basic 9.0 are based on monad comprehensions from Haskell.  ... 
doi:10.1145/1238844.1238856 dblp:conf/hopl/HudakHJW07 fatcat:7i7s3ivrkzhotgoyvjnxcjglxu

Dependable event processing over high frequency data streams

Andrea Floh, Schahram Dustdar, Waldemar Hummer
2014
These strategies are discussed and their applicability for different types of queries is evaluated. For this reason, a taxonomy of queries in event processing systems is elaborated.  ...  This thesis covers strategies to handle phases of high data volume on event streams for a single event processing node.  ...  The lookup of services utilizes the Query engine, which processes queries written in the VRESCo Query Language (VQL), a declarative query language.  ... 
doi:10.34726/hss.2014.22147 fatcat:nl3dnp6quvey7mvp3lk34br27q
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