* tweaks
* mysql
* mysql
* Update homeassistant/components/recorder/history/modern.py
* Update homeassistant/components/recorder/history/modern.py
* Update homeassistant/components/recorder/const.py
* Update homeassistant/components/recorder/statistics.py
* Apply suggestions from code review
* mysql
* mysql
* cover
* make sure db is fully init on old schema
* fixes
* fixes
* coverage
* coverage
* coverage
* s/slow_dependant_subquery/slow_dependent_subquery/g
* reword
* comment that callers are responsible for staying under the limit
* comment that callers are responsible for staying under the limit
* switch to kwargs
* reduce branching complexity
* split stats query
* preen
* split tests
* split tests