3 papers
cs.DB2022
Efficient query evaluation techniques over large amount of distributed linked data
Eleftherios Kalogeros, Manolis Gergatsoulis, Matthew Damigos +1
As RDF becomes more widely established and the amount of linked data is rapidly increasing, the efficient querying of large amount of data becomes a significant challenge. In this…
cs.DB2021
Querying collections of tree-structured records in the presence of within-record referential constraints
Foto N. Afrati, Matthew Damigos
In this paper, we consider a tree-structured data model used in many commercial databases like Dremel, F1, JSON stores. We define identity and referential constraints within each t…
cs.DB2020
On the complexity of query containment and computing certain answers in the presence of ACs
Foto N. Afrati, Matthew Damigos
We often add arithmetic to extend the expressiveness of query languages and study the complexity of problems such as testing query containment and finding certain answers in the fr…