-NOTES ABOUT THE BACKENDS
-
-MYSQL
-
-drop-index: requires a table to be specified with the :from keyword parameter
-views: mysql does not support views
-queries: nested subqueries are not supported
-syntax: doesn't support the sql concatenation operator (||).
-
-SQLITE
-
-create-view: column-list parameter not supported
-syntax: doesn't support the sql SUBSTRING operator.