Denodo Joins the Presto Foundation

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We are pleased to announce that Denodo Technologies has joined the Presto Foundation. The Denodo Platform is a popular data management platform based on the concept of data virtualization and logical data models, which includes capabilities for data integration, privacy, governance, and data cataloging. Denodo is often used to implement logical and distributed data architectures…

Even Faster Unnest

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Unnest is a common operation in Facebook’s daily Presto workload. It converts an ARRAY, MAP, or ROW into a flat relation. Its original implementation used deep copy all the time and was very inefficient. In Unnest Operator Performance Enhancement with Dictionary Blocks, the author improved the Unnest operator by up to 10x in CPU and…