Geo::getDBColumnType

static function getDBColumnType($arUserField)
{
	$connection = BitrixMainApplication::getConnection();
	$helper = $connection->getSqlHelper();
	return $helper->getColumnTypeByField(
		new BitrixMainORMFieldsStringField('x',  [
			'size' => 100,
			'validation' => function()
			{
				return [
					new BitrixMainEntityValidatorLength(null, 100),
				];
			},
		])
	);
}