+ - connection pools
+ - database-query-result-set
+
+5. Notes on any peculiarities of each of the backends (e.g., unsupported
+ features, notable extensions etc.).
+
+ - MYSQL
+
+ drop-index: requires a table to be specified with the :from parameter
+ views: mysql does not support views
+ queries: nested subqueries are not supported
+ syntax: doesn't support the sql concatenation operator (||).
+ doesn't support INTERSECT/EXCEPT set operations.
+
+ - SQLITE
+
+ connection: specifying ":memory:" gives you an SQLite database in RAM.
+ create-view: column-list parameter not supported
+ syntax: doesn't support the sql SUBSTRING operator.