Cost-Aware Uncertainty Reduction in Schema Matching with GPT-4: The Prompt-Matcher Framework

Schema matching is the process of identifying correspondences between the elements of two given schemata, essential for database management systems, data integration, and data warehousing. The inherent uncertainty of current schema matching algorithms leads to the generation of a set of candidate matches. Storing these results necessitates the use of databases and systems capable of handling probabilistic queries. This complicates the querying process and increases the associated storage costs. Motivated by GPT-4 outstanding performance, we explore its potential to reduce uncertainty. Our proposal is to supplant the role of crowdworkers with GPT-4 for querying the set of candidate matches. To get more precise correspondence verification responses from GPT-4, We have crafted Semantic-match and Abbreviation-match prompt for GPT-4, achieving state-of-the-art results on two benchmark datasets DeepMDatasets 100% (+0.0) and Fabricated-Datasets 91.8% (+2.2) recall rate. To optimise budget utilisation, we have devised a cost-aware solution. Within the constraints of the budget, our solution delivers favourable outcomes with minimal time expenditure. We introduce a novel framework, Prompt-Matcher, to reduce the uncertainty in the process of integration of multiple automatic schema matching algorithms and the selection of complex parameterization. It assists users in diminishing the uncertainty associated with candidate schema match results and in optimally ranking the most promising matches. We formally define the Correspondence Selection Problem, aiming to optimise the revenue within the confines of the GPT-4 budget. We demonstrate that CSP is NP-Hard and propose an approximation algorithm with minimal time expenditure. Ultimately, we demonstrate the efficacy of Prompt-Matcher through rigorous experiments.