DESCRIPTIONNote that MySQL has support for difference storage engines. Each storage engine has its' own properties and the respective SQL differs.
_get_drop_index_sqlcreate drop index for index on table with given name. Note that the tablename is not used here, but many of the overriding subclasses use it, so we include both the tablename and the indexname as arguments to keep the interface consistent.
get_schema_dropcreate drop table for all tables using MySQL syntax:
drop table t if exists