TLDR: Uber is using MySQL as part of their "Schemalass" key-value store (https://eng.uber.com/schemaless-part-one/), a somewhat unusual use case in which it may be a better choice than PostgreSQL. It's not really an evaluation of MySQL vs. PostgreSQL as relational databases.
TLDR: Uber is using MySQL as part of their "Schemalass" key-value store (https://eng.uber.com/schemaless-part-one/), a somewhat unusual use case in which it may be a better choice than PostgreSQL. It's not really an evaluation of MySQL vs. PostgreSQL as relational databases.