{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,16]],"date-time":"2025-10-16T06:54:26Z","timestamp":1760597666840},"reference-count":17,"publisher":"Association for Computing Machinery (ACM)","issue":"12","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Proc. VLDB Endow."],"published-print":{"date-parts":[[2015,8]]},"abstract":"<jats:p>\n            One important issue in modern database applications is supporting the user with efficient tools to debug and fix queries because such tasks are both time and skill demanding. One particular problem is known as\n            <jats:italic>Why-Not question<\/jats:italic>\n            and focusses on the reasons for missing tuples from query results. The\n            <jats:italic>EFQ<\/jats:italic>\n            platform demonstrated here has been designed in this context to efficiently leverage\n            <jats:italic>Why-Not Answers polynomials<\/jats:italic>\n            , a novel approach that provides the user with complete explanations to Why-Not questions and allows for automatic, relevant query refinements.\n          <\/jats:p>","DOI":"10.14778\/2824032.2824116","type":"journal-article","created":{"date-parts":[[2015,9,16]],"date-time":"2015-09-16T12:18:17Z","timestamp":1442405897000},"page":"1980-1983","source":"Crossref","is-referenced-by-count":9,"title":["EFQ"],"prefix":"10.14778","volume":"8","author":[{"given":"Nicole","family":"Bidoit","sequence":"first","affiliation":[{"name":"Universit\u00e9 Paris Sud, Inria, France"}]},{"given":"Melanie","family":"Herschel","sequence":"additional","affiliation":[{"name":"Universit\u00e4t Stuttgart, Stuttgart, Germany"}]},{"given":"Katerina","family":"Tzompanaki","sequence":"additional","affiliation":[{"name":"Universit\u00e9 Paris Sud, Inria, France"}]}],"member":"320","published-online":{"date-parts":[[2015,8]]},"reference":[{"key":"e_1_2_1_1_1","volume-title":"EDBT","author":"Baid A.","year":"2015","unstructured":"A. Baid , W. Wu , C. Sun , A. Doan , and J. F. Naughton . On debugging Non-Answers in keyword search systems . In EDBT , 2015 . A. Baid, W. Wu, C. Sun, A. Doan, and J. F. Naughton. On debugging Non-Answers in keyword search systems. In EDBT, 2015."},{"key":"e_1_2_1_2_1","volume-title":"TAPP","author":"Bidoit N.","year":"2014","unstructured":"N. Bidoit , M. Herschel , and K. Tzompanaki . Immutably answering Why-Not questions for equivalent conjunctive queries . In TAPP , 2014 . N. Bidoit, M. Herschel, and K. Tzompanaki. Immutably answering Why-Not questions for equivalent conjunctive queries. In TAPP, 2014."},{"key":"e_1_2_1_3_1","first-page":"145","volume-title":"EDBT","author":"Bidoit N.","year":"2014","unstructured":"N. Bidoit , M. Herschel , and K. Tzompanaki . Query-based Why-Not provenance with Nedexplain . In EDBT , pages 145 -- 156 , 2014 . N. Bidoit, M. Herschel, and K. Tzompanaki. Query-based Why-Not provenance with Nedexplain. In EDBT, pages 145--156, 2014."},{"key":"e_1_2_1_5_1","first-page":"421","volume-title":"ICDE","author":"Borzsony S.","year":"2001","unstructured":"S. Borzsony , D. Kossmann , and K. Stocker . The skyline operator . In ICDE , pages 421 -- 430 . IEEE, 2001 . S. Borzsony, D. Kossmann, and K. Stocker. The skyline operator. In ICDE, pages 421--430. IEEE, 2001."},{"key":"e_1_2_1_6_1","first-page":"870","volume-title":"AAAI\/IAAI","author":"Chalupsky H.","year":"2002","unstructured":"H. Chalupsky and T. A. Russ . WhyNot: debugging failed queries in large knowledge bases . In AAAI\/IAAI , pages 870 -- 877 , 2002 . H. Chalupsky and T. A. Russ. WhyNot: debugging failed queries in large knowledge bases. In AAAI\/IAAI, pages 870--877, 2002."},{"key":"e_1_2_1_7_1","first-page":"523","volume-title":"SIGMOD","author":"Chapman A.","year":"2009","unstructured":"A. Chapman and H. V. Jagadish . Why not ? In SIGMOD , pages 523 -- 534 , 2009 . 10.1145\/1559845.1559901 A. Chapman and H. V. Jagadish. Why not? In SIGMOD, pages 523--534, 2009. 10.1145\/1559845.1559901"},{"key":"e_1_2_1_8_1","first-page":"738","volume-title":"PVLDB","author":"Gao Y.","year":"2015","unstructured":"Y. Gao , Q. Liu , G. Chen , B. Zheng , and L. Zhou . Answering why-not questions on reverse top-k queries . PVLDB , pages 738 -- 749 , 2015 . 10.14778\/2752939.2752943 Y. Gao, Q. Liu, G. Chen, B. Zheng, and L. Zhou. Answering why-not questions on reverse top-k queries. PVLDB, pages 738--749, 2015. 10.14778\/2752939.2752943"},{"key":"e_1_2_1_9_1","first-page":"1","volume-title":"JDIQ","author":"Herschel M.","year":"2015","unstructured":"M. Herschel . A hybrid approach to answering Why-Not questions on relational query results . JDIQ , pages 10: 1 -- 10 :29, 2015 . 10.1145\/2665070 M. Herschel. A hybrid approach to answering Why-Not questions on relational query results. JDIQ, pages 10:1--10:29, 2015. 10.1145\/2665070"},{"key":"e_1_2_1_10_1","first-page":"2731","volume-title":"CIKM","author":"Herschel M.","year":"2012","unstructured":"M. Herschel and H. Eichelberger . The Nautilus Analyzer: understanding and debugging data transformations . In CIKM , pages 2731 -- 2733 , 2012 . 10.1145\/2396761.2398743 M. Herschel and H. Eichelberger. The Nautilus Analyzer: understanding and debugging data transformations. In CIKM, pages 2731--2733, 2012. 10.1145\/2396761.2398743"},{"key":"e_1_2_1_11_1","first-page":"185","volume-title":"PVLDB","author":"Herschel M.","year":"2010","unstructured":"M. Herschel and M. A. Hern\u00e1ndez . Explaining missing answers to SPJUA queries . PVLDB , pages 185 -- 196 , 2010 . 10.14778\/1920841.1920869 M. Herschel and M. A. Hern\u00e1ndez. Explaining missing answers to SPJUA queries. PVLDB, pages 185--196, 2010. 10.14778\/1920841.1920869"},{"key":"e_1_2_1_12_1","first-page":"1550","volume-title":"PVLDB","author":"Herschel M.","year":"2009","unstructured":"M. Herschel , M. A. Hern\u00e1ndez , and W. C. Tan . Artemis: A system for analyzing missing answers . PVLDB , pages 1550 -- 1553 , 2009 . 10.14778\/1687553.1687588 M. Herschel, M. A. Hern\u00e1ndez, and W. C. Tan. Artemis: A system for analyzing missing answers. PVLDB, pages 1550--1553, 2009. 10.14778\/1687553.1687588"},{"key":"e_1_2_1_13_1","doi-asserted-by":"publisher","DOI":"10.14778\/1453856.1453936"},{"key":"e_1_2_1_14_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jss.2014.07.011"},{"key":"e_1_2_1_15_1","doi-asserted-by":"publisher","DOI":"10.1145\/1516360.1516459"},{"key":"e_1_2_1_16_1","first-page":"1762","volume-title":"PVLDB","author":"Mottin D.","year":"2013","unstructured":"D. Mottin , A. Marascu , S. B. Roy , G. Das , T. Palpanas , and Y. Velegrakis . A probabilistic optimization framework for the empty-answer problem . PVLDB , pages 1762 -- 1773 , 2013 . 10.14778\/2556549.2556560 D. Mottin, A. Marascu, S. B. Roy, G. Das, T. Palpanas, and Y. Velegrakis. A probabilistic optimization framework for the empty-answer problem. PVLDB, pages 1762--1773, 2013. 10.14778\/2556549.2556560"},{"key":"e_1_2_1_17_1","volume-title":"TaPP","author":"Riddle S.","year":"2014","unstructured":"S. Riddle , S. K\u00f6hler , and B. Lud\u00e4scher . Towards constraint provenance games . In TaPP , 2014 . S. Riddle, S. K\u00f6hler, and B. Lud\u00e4scher. Towards constraint provenance games. In TaPP, 2014."},{"key":"e_1_2_1_18_1","first-page":"15","volume-title":"SIGMOD","author":"Tran Q. T.","year":"2010","unstructured":"Q. T. Tran and C.-Y. Chan . How to ConQueR why-not questions . In SIGMOD , pages 15 -- 26 , 2010 . 10.1145\/1807167.1807172 Q. T. Tran and C.-Y. Chan. How to ConQueR why-not questions. 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