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Applying Constraint Logic Programming to SQL Semantic Analysis

Published online by Cambridge University Press:  20 September 2019

FERNANDO SÁENZ-PÉREZ Open the ORCID record for FERNANDO SÁENZ-PÉREZ [Opens in a new window]
FERNANDO SÁENZ-PÉREZ*
Affiliation:
Complutense University of Madrid, 28040 Madrid, Spain (e-mail: fernan@sip.ucm.es)
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Abstract

This paper proposes the use of Constraint Logic Programming (CLP) to model SQL queries in a data-independent abstract layer by focusing on some semantic properties for signalling possible errors in such queries. First, we define a translation from SQL to Datalog, and from Datalog to CLP, so that solving this CLP program will give information about inconsistency, tautology, and possible simplifications. We use different constraint domains which are mapped to SQL types, and propose them to cooperate for improving accuracy. Our approach leverages a deductive system that includes SQL and Datalog, and we present an implementation in this system which is currently being tested in classroom, showing its advantages and differences with respect to other approaches, as well as some performance data.

Keywords

Constraint Logic ProgrammingSQLSemantic CheckingDatalog Educational System
Type
Original Article
Information
Theory and Practice of Logic Programming , Volume 19 , Special Issue 5-6: 35th International Conference on Logic Programming , September 2019 , pp. 808 - 825
Copyright
© Cambridge University Press 2019 

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Footnotes

*

Work partially funded by the Spanish Ministry of Economy and Competitiveness, under the grant TIN2017-86217-R (CAVI-ART-2), and by the Madrid Regional Government, under the grant S2018/TCS-4339 (BLOQUES-CM), co-funded by EIE Funds of the European Union. Special thanks are due to the anonymous referees.

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