Robust Query Processing : Now Publishers : 9781638284260 : 17 Dec 2024 : The primary function of a database system is to efficiently compute correct answers to user queries. Therefore, robust query processing (RQP), where strong numerical guarantees are provided on query performance, has been a long-standing core objective in the design of industrial-strength database engines. Unfortunately, however, RQP has proved to be a largely intractable and elusive challenge, despite sustained efforts spanning several decades. In this monograph, a holistic coverage of the RQP innovations is provided, and strengths and limitations are highlighted. Further, open technical problems that remain to be solved to make RQP a contemporary reality are also enumerated. In this monograph, representative techniques along these various dimensions are covered. After the introduction, a background to RQP is given. In the chapters thereafter, the authors cover Robust Operators, Plans, and Execution, and then Str