MySQL is a well known DataBase Management System (DBMS) that provides vari- ous types of tables for different database applications. Version 4.1.0 and above MySQL databases are spatially extended to incorporate the Open GIS Consortium Simple Fea- tures Specification for simple geometric features. The MySQL reader and writer plug- in provides the Feature Manipulation Engine (FME) with the ability to read and write both attribute and geometric data stored in a MySQL database. There are two versions of the reader and writer, MySQL which includes the spatial extension and supports ge- ometry features, and MySQL_DB which is an attribute only version which ignores ge- ometry. Currently the table types that can be read are MyISAM, InnoDB and MEMORY. Note that only MyISAM tables currently support geometry columns. The MySQL reader and writer are specifically designed to handle the geometric portions of the data when present and are optimized for non-geometry or attribute processing when no spatial columns are present. The MySQL reader and writer communicate di- rectly with the MySQL C API interface for maximum throughput. This chapter assumes familiarity with MySQL, the table types, column types, OGC ge- ometry types, available server daemons, indexing mechanisms and connection param- eters. Please note that MySQL functionality that only exists in the MySQL road map and not in practice such as integration of the Spatial Reference Systems (SRS), spatial meta- data tables, spatial operators, server side cursors and views were considered but are not currently integrated into the MySQL reader for FME.