Zhenhua Wang, Research Engineer at Huawei Technologies

Zhenhua Wang

Research Engineer, Huawei Technologies

Zhenhua Wang is a Research Engineer at Huawei Technologies where he works on building a big data analytics platform based on Apache Spark. Prior to joining Huawei, he received a PhD degree in Computer Science from Zhejiang University. His research interests include information retrieval and web data mining.


Cost-Based Optimizer in Apache Spark 2.2 (continues)

Apache Spark 2.2 ships with a state-of-art cost-based optimization framework that collects and leverages a variety of per-column data statistics (e.g., cardinality, number of distinct values, NULL values, max/min, avg/max length, etc.) to improve the… Read more