Adding magic to an optimising datalog compiler.
The magic-sets transformation is a useful technique for dramatically improving the performance of complex queries, but it has been observed that this transformation can also drastically reduce the performance of some queries. Successful implementations of magic in previous work require integration with the database optimise!' to make appropriate decisions to guide the transformation (the sideways information-passing strategy, or SIPS). This paper reports on the addition of the magic-sets tran...Expand abstract
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