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PAQO
2013
Proceedings of the VLDB Endowment
Although the declarative nature of SQL provides great utility to database users, its use in distributed database management systems can leave users unaware of which servers in the system are evaluating portions of their queries. By allowing users to merely say what data they are interested in accessing without providing guidance regarding how to retrieve it, query optimizers can generate plans with unintended consequences to the user (e.g., violating user privacy by revealing sensitive portions
doi:10.14778/2536274.2536309
fatcat:jvef66sbsfa3rmk7tvnmnc3mju