3 papers
cs.DB2024
Query Performance Explanation through Large Language Model for HTAP Systems
Haibo Xiu, Li Zhang, Tieying Zhang +2
In hybrid transactional and analytical processing (HTAP) systems, users often struggle to understand why query plans from one engine (OLAP or OLTP) perform significantly slower tha…
cs.DB2024
CrypQ: A Database Benchmark Based on Dynamic, Ever-Evolving Ethereum Data
Vincent Capol, Yuxi Liu, Haibo Xiu +1
Modern database systems are expected to handle dynamic data whose characteristics may evolve over time. Many popular database benchmarks are limited in their ability to evaluate th…
cs.DB2024
PARQO: Penalty-Aware Robust Plan Selection in Query Optimization
Haibo Xiu, Pankaj K. Agarwal, Jun Yang
The effectiveness of a query optimizer relies on the accuracy of selectivity estimates. The execution plan generated by the optimizer can be extremely poor in reality due to uncert…