Alberto Rguez

02/20/2023, 1:56 PM
Hi All, I am new to delta tables and Databricks and I would like to ask if some can help with some performance tuning tips. Currently some of our tables present very complex nested data. And the queries run really slow. Any suggestion about working with very huge nested columns (struct and array) is welcome. The data is originally in one big string but I convert them to several Json columns using from_json. Thanks in advance