IBM joins the Presto Foundation through acquisition of Ahana

By  & 

Today we’re thrilled to share that IBM has acquired Ahana, the venture-backed SaaS for Presto startup company, and we want to write more about our belief in Open Source and why IBM and Ahana are joining forces for the benefit of Presto. We believe that this is an exciting time for the Presto project. We’re…

Spatial Joins 1: Local Spatial Joins

By 

A common type of spatial query involves relating one table of geometric objects (e.g., a table population_centers with columns population, latitude, longitude) with another such table (e.g., a table counties with columns county_name, boundary_wkt), such as calculating for each county the population sum of all population centers contained within it. These kinds of calculations are…