InvoiceDataSource::preparePermissionSql

protected function preparePermissionSql()
{
	if($this->permissionSql !== null)
	{
		return $this->permissionSql;
	}

	if(\CCrmPerms::IsAdmin($this->userID))
	{
		$this->permissionSql = '';
	}
	else
	{
		$this->permissionSql = \CCrmPerms::BuildSql(
			\CCrmOwnerType::InvoiceName,
			'',
			'READ',
			array('RAW_QUERY' => true, 'PERMS'=> \CCrmPerms::GetUserPermissions($this->userID))
		);
	}
	return $this->permissionSql;
}