Worked on enhancing Maxwell’s compatibility with MariaDB by addressing issues related to generated columns. Focused on stabilizing support for the PERSISTENT keyword, this work involved updating the ANTLR grammar to recognize new syntax and prevent crashes during table creation with virtual or stored generated columns. The changes, implemented in the zendesk/maxwell repository, improved reliability for MariaDB users by aligning Maxwell’s parsing logic with MariaDB’s generated column features. Leveraged skills in ANTLR grammar design, SQL, and database management, with code written in ANTLR and Ruby, to ensure that persistent generated columns are correctly handled and system stability is maintained.