Added MariaDB info and another solution

migrations.md

@@ -359,9 +359,9 @@ Command  | Description
 `$table->unique(['first', 'last']);`  |  Add a composite unique index.
 `$table->index('state');`  |  Add a basic index.
 
-#### Index Lengths & MySQL
+#### Index Lengths & MySQL/MariaDB
 
-Laravel uses the `utf8mb4` character set by default, which includes support for storing "emojis" in the database. If you are running a version of MySQL older than the 5.7.7 release, you may need to manually configure the default string length generated by migrations in order for MySQL to create indexes for them. You may configure this by calling the `Schema::defaultStringLength` method within your `AppServiceProvider`:
+Laravel uses the `utf8mb4` character set by default, which includes support for storing "emojis" in the database. If you are running a version of MySQL older than the 5.7.7 release or a version of MariaDB older than the 10.2.2 release, you may need to manually configure the default string length generated by migrations in order for MySQL to create indexes for them. You may configure this by calling the `Schema::defaultStringLength` method within your `AppServiceProvider`:
 
     use Illuminate\Support\Facades\Schema;
 
@@ -375,6 +375,8 @@ Laravel uses the `utf8mb4` character set by default, which includes support for
         Schema::defaultStringLength(191);
     }
 
+Another solution for this problem is using the `innodb_large_prefix` option, check your RDBMS manual for instructions on how to properly enable it.
+
 <a name="dropping-indexes"></a>
 ### Dropping Indexes