4 papers · 2 filters
Pessimistic Cardinality Estimation
Mahmoud Abo Khamis, Kyle Deeds, Dan Olteanu +1
Cardinality Estimation is to estimate the size of the output of a query without computing it, by using only statistics on the input relations. Existing estimators try to return an…
QirK: Question Answering via Intermediate Representation on Knowledge Graphs
Jan Luca Scheerer, Anton Lykov, Moe Kayali +4
We demonstrate QirK, a system for answering natural language questions on Knowledge Graphs (KG). QirK can answer structurally complex questions that are still beyond the reach of e…
Galley: Modern Query Optimization for Sparse Tensor Programs
Kyle Deeds, Willow Ahrens, Magda Balazinska +1
The tensor programming abstraction is a foundational paradigm which allows users to write high performance programs via a high-level imperative interface. Recent work on sparse ten…
Color: A Framework for Applying Graph Coloring to Subgraph Cardinality Estimation
Kyle Deeds, Diandre Sabale, Moe Kayali +1
Graph workloads pose a particularly challenging problem for query optimizers. They typically feature large queries made up of entirely many-to-many joins with complex correlations.…