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cs.DB2026
Bala-Join: An Adaptive Hash Join for Balancing Communication and Computation in Geo-Distributed SQL Databases
Wenlong Song, Hui Li, Bingying Zhai +5
Shared-nothing geo-distributed SQL databases, such as CockroachDB, are increasingly vital for enterprise applications requiring data resilience and locality. However, we encountere…
cs.DB2024
QSketch: An Efficient Sketch for Weighted Cardinality Estimation in Streams
Yiyan Qi, Rundong Li, Pinghui Wang +2
Estimating cardinality, i.e., the number of distinct elements, of a data stream is a fundamental problem in areas like databases, computer networks, and information retrieval. This…