Binary package “mysql-source-5.7” in ubuntu eoan

MySQL source

 MySQL is a fast, stable, and true multi-user, multi-threaded SQL database
 server. SQL (Structured Query Language) is the most popular database query
 language in the world. The main goals of MySQL are speed, robustness and
 ease of use.
 .
 This package includes the MySQL source code as configured before building
 - but after the arch specific configuration. This is currently required for
 building plugins.