Hello everyone! I’m currently developing a Go backend that utilizes GORM with a PostgreSQL database, alongside some direct SQL queries. I’ve got to shift everything over to MySQL for a new requirement. Has anyone undertaken a similar migration? I’m interested in any insights regarding issues to anticipate, like UUID handling, JSON data types, common table expressions, or raw database queries. I’d appreciate hearing about your experiences and any strategies that worked for you. Thank you!
I transitioned from Postgres to MySQL with GORM a while back, and it was more intricate than I initially anticipated. The primary challenge was the UUIDs; MySQL’s lack of native support meant I had to adapt them to CHAR(36). Additionally, while MySQL 5.7 and above supports JSON types, the query syntax is distinct from that of Postgres, which required substantial rewrites of raw queries that utilized JSON operators. We also faced issues with common table expressions, as they weren’t available in our MySQL version, prompting us to restructure some complex queries significantly. I recommend meticulously reviewing raw SQL first, adjusting your GORM models accordingly, and performing thorough testing with realistic data volumes to gauge performance differences.