missing datatype.

if they are new then copyright should be 2018 not 2012 :P

if they are new then copyright should be 2018 not 2012 :P

if they are new then copyright should be 2018 not 2012 :P

if they are new then copyright should be 2018 not 2012 :P

expectedReturningDataProvider

snake_case

if they are new then copyright should be 2018 not 2012 :P

if they are new then copyright should be 2018 not 2013 :P

if they are new then copyright should be 2018 not 2013 :P

why double??

expectedReturningDataProvider

if they are new then copyright should be 2018 not 2013 :P

This misses the data type. Look at the @var boolean above.

$this->escaper gets set in the parent constructor as well. Choose either one.

unsetting $this->escaper is done in the parent destruct as well. Choose one.

please add : <directory>../src/Lunr/Gravity/Database/MariaDB/Tests/</directory>

I'd like to have the MariaDB connection / query builder classes in a separate review first, before adding delete returning functionality.

Also, the change to not have the simple query builder extend the parent query builder should be done uniformly for MySQL/SQLite in a separate review as well.

We typically call those columns

you escape columns and then use the unescaped original...