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cs.DB2023
Computing the Difference of Conjunctive Queries Efficiently
Xiao Hu, Qichen Wang
We investigate how to efficiently compute the difference result of two (or multiple) conjunctive queries, which is the last operator in relational algebra to be unraveled. The stan…
cs.DB2023★ 16 cited
Change Propagation Without Joins
Qichen Wang, Xiao Hu, Binyang Dai +1
We revisit the classical change propagation framework for query evaluation under updates. The standard framework takes a query plan and materializes the intermediate views, which i…