{ "item_title" : "Typing Polymorphic Relational Operators", "item_author" : [" Lajos Nagy "], "item_description" : "The overarching goal of the current book is to pave the road towards a comprehensive solution to the decades old problem of integrating databases and programming languages. For this purpose, we propose a record calculus as an extension of an ML-style functional programming language core that is powerful enough to allow type inference for user-defined polymorphic relational operators. The type system described in the book allows the definition and typing of standard relational operators like join, project, divide, restrict, and others in a flexible, polymorphic way.", "item_img_path" : "https://covers3.booksamillion.com/covers/bam/3/63/906/854/3639068548_b.jpg", "price_data" : { "retail_price" : "52.92", "online_price" : "52.92", "our_price" : "52.92", "club_price" : "52.92", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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