MySQL support

[nene]

Summary ticket for overall implementation progress in MySQL.

• MySQL support (queries) #5
• MySQL support (DML) #54
• MySQL support (create table) #55
• MySQL support (alter/drop/rename table) #56
• MySQL support (DDL) #59
• MySQL support (procedural language) #60
• MySQL support (transactions) #61
• MySQL support (other statements) #62
• MySQL support (DELIMITER) #89

See also MariaDB support, which gets developed in-hand with MySQL:

• MariaDB support #32