CBPAllStateService::DeleteStateParameter: Bitrix method

      
<?php 
//  CBPAllStateService :: DeleteStateParameter()
//  /dist/bitrix/modules/bizproc/classes/general/stateservice.php:611

    public function DeleteStateParameter($workflowId, $name)
    {
        global $DB;

        $workflowId = trim($workflowId);
        if (strlen($workflowId) <= 0)
            throw new Exception("workflowId");

        $dbResult = $DB->Query(
            "SELECT STATE_PARAMETERS ".
            "FROM b_bp_workflow_state ".
            "WHERE ID = '".$DB->ForSql($workflowId)."' "
        );

        if ($arResult = $dbResult->Fetch())
        {
            $stateParameters = array();
            if (strlen($arResult["STATE_PARAMETERS"]) > 0)
                $stateParameters = unserialize($arResult["STATE_PARAMETERS"]);

            $ar = array();
            foreach ($stateParameters as $v)
            {
                if ($v["NAME"] != $name)
                    $ar[] = $v;
            }

            $stateParameters = "";
            if (count($ar) > 0)
                $stateParameters = serialize($ar);

            $DB->Query(
                "UPDATE b_bp_workflow_state SET ".
                "    STATE_PARAMETERS = ".(strlen($stateParameters) > 0 ? "'".$DB->ForSql($stateParameters)."'" : "NULL").", ".
                "    MODIFIED = ".$DB->CurrentTimeFunction()." ".
                "WHERE ID = '".$DB->ForSql($workflowId)."' "
            );
        }
    }