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arXiv · 2307.15255

Predicate Transfer: Efficient Pre-Filtering on Multi-Join Queries

Yifei Yang·Hangdong Zhao·Xiangyao Yu·Paraschos Koutris
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Abstract

This paper presents predicate transfer, a novel method that optimizes join performance by pre-filtering tables to reduce the join input sizes. Predicate transfer generalizes Bloom join, which conducts pre-filtering within a single join operation, to multi-table joins such that the filtering benefits can be significantly increased. Predicate transfer is inspired by the seminal theoretical results by Yannakakis, which uses semi-joins to pre-filter acyclic queries. Predicate transfer generalizes the theoretical results to any join graphs and use Bloom filters to replace semi-joins leading to significant speedup. Evaluation shows predicate transfer can outperform Bloom join by 3.1x on average on TPC-H benchmark.

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Yifei Yang, Hangdong Zhao, Xiangyao Yu, Paraschos Koutris. 2023-07-28. Predicate Transfer: Efficient Pre-Filtering on Multi-Join Queries. https://arxiv.org/abs/2307.15255

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