Introduction Presto, an open-source distributed SQL query engine, excels at querying large data sets distributed across diverse data sources. It has maintained its position as a high-performance data analytics tool for over a decade. As data collection capabilities expand, businesses increasingly recognize the importance of historical data alongside current data. With the recent release of…
In the previous article we looked at the abstract problem statement and possibilities inherent in scanning tables. In this piece we look at the quantitative upside with Presto. We look at a number of queries and explain the findings. The initial impulse motivating this work is the observation that table scan is by far the…
Table scan, on the face of it, sounds trivial and boring. What’s there in just reading a long bunch of records from first to last? Aren’t indexing and other kinds of physical design more interesting? As data has gotten bigger, the columnar table scan has only gotten more prominent. The columnar scan is a fairly…