Fix char migration for pgsql

[rommelandrea]

Hi, it's possible to edit char_migration with this code?
It fix error on postgres for modify function that not exist

public function up()
    {
        Schema::table(\Config::get('countries.table_name'), function ($table) {
            if (env('DB_CONNECTION') == 'pgsql') {
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " ALTER COLUMN country_code TYPE CHAR(3)");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " ALTER COLUMN iso_3166_2 TYPE CHAR(2)");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " ALTER COLUMN iso_3166_3 TYPE CHAR(3) ");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " ALTER COLUMN region_code TYPE CHAR(3)");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " ALTER COLUMN sub_region_code TYPE CHAR(3)");
            } else {
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " MODIFY country_code CHAR(3) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " MODIFY iso_3166_2 CHAR(2) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " MODIFY iso_3166_3 CHAR(3) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " MODIFY region_code CHAR(3) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " MODIFY sub_region_code CHAR(3) NOT NULL DEFAULT ''");
            }
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return  void
     */
    public function down()
    {
        Schema::table(\Config::get('countries.table_name'), function ($table) {
            if (env('DB_CONNECTION') == 'pgsql') {
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " ALTER COLUMN country_code VARCHAR(3) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " ALTER COLUMN iso_3166_2 VARCHAR(2) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " ALTER COLUMN iso_3166_3 VARCHAR(3) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " ALTER COLUMN region_code VARCHAR(3) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " ALTER COLUMN sub_region_code VARCHAR(3) NOT NULL DEFAULT ''");
            } else {
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " MODIFY country_code VARCHAR(3) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " MODIFY iso_3166_2 VARCHAR(2) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " MODIFY iso_3166_3 VARCHAR(3) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " MODIFY region_code VARCHAR(3) NOT NULL DEFAULT ''");
                DB::statement("ALTER TABLE " . DB::getTablePrefix() . \Config::get('countries.table_name') . " MODIFY sub_region_code VARCHAR(3) NOT NULL DEFAULT ''");
            }
        });
    }