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The Cost of Representation by Subset Repairs
Yuxi Liu, Fangzhu Shen, Kushagra Ghosh +3
Datasets may include errors, and specifically violations of integrity constraints, for various reasons. Standard techniques for ``minimal-cost'' database repairing resolve these vi…
Summarized Causal Explanations For Aggregate Views (Full version)
Brit Youngmann, Michael Cafarella, Amir Gilad +1
SQL queries with group-by and average are frequently used and plotted as bar charts in several data analysis applications. Understanding the reasons behind the results in such an a…
Qr-Hint: Actionable Hints Towards Correcting Wrong SQL Queries
Yihao Hu, Amir Gilad, Kristin Stephens-Martinez +2
We describe a system called Qr-Hint that, given a (correct) target query Q* and a (wrong) working query Q, both expressed in SQL, provides actionable hints for the user to fix the…
Evaluating Datalog over Semirings: A Grounding-based Approach
Hangdong Zhao, Shaleen Deep, Paraschos Koutris +2
Datalog is a powerful yet elegant language that allows expressing recursive computation. Although Datalog evaluation has been extensively studied in the literature, so far, only lo…