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Grammar-based Neural Text-to-sql Generation

Kevin Lin, Ben Bogin, Mark Neumann, Jonathan Berant, Matt Gardner . Arxiv 2019 – 51 citations

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The sequence-to-sequence paradigm employed by neural text-to-SQL models typically performs token-level decoding and does not consider generating SQL hierarchically from a grammar. Grammar-based decoding has shown significant improvements for other semantic parsing tasks, but SQL and other general programming languages have complexities not present in logical formalisms that make writing hierarchical grammars difficult. We introduce techniques to handle these complexities, showing how to construct a schema-dependent grammar with minimal over-generation. We analyze these techniques on ATIS and Spider, two challenging text-to-SQL datasets, demonstrating that they yield 14–18% relative reductions in error.

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