Please join Federico Razzoli, Consultant at Percona, on Thursday, December 8, 2016, at 8 AM PT / 11 AM ET (UTC – 8) as he presents Virtual Columns in MySQL and MariaDB.
MariaDB 5.2 and MySQL 5.7 introduced virtual columns, with different implementations.Their features and limitations are similar, but not identical. The main difference is that only MySQL allows you to build an index on a non-persistent column.
In this talk, we’ll present some use cases for virtual columns. These cases include query simplification and UNIQUE constraints based on an SQL expression. In particular, we will see how to use them to index JSON data in MySQL, or dynamic columns in MariaDB.
Performance and limitations will also be discussed.
Federico Razzoli is a relational databases lover and open source supporter. He is a MariaDB Community Ambassador and wrote “Mastering MariaDB” in 2014. Currently, he works for Percona as a consultant.