Analyze the code below and create a manual for customer guidance.

/**
     * Search the list of gifts given - giveaway items
     *
     * @param $aParams
     * @return array|bool|\PDOStatement
     */
    public function getOrderBenefitItemList($aParams)
    {
        // SELECT clause field settings
        $aSelectFieldInfo = $this->getQuerySelect(constOrderBenefitItem::SCHEMA, [], [
            'log_no' => 'sobi.log_no',
            'mall_order_key' => 'sobi.mall_order_key',
            'order_no' => 'sobi.order_no',
            'order_item_no' => 'sobi.order_item_no',
            'benefit_no' => 'sobi. benefit_no',
            'benefit_name' => 'sobi. benefit_name',
            'product_name' => 'sobi.product_name',
            'option_name' => 'sobi.option_name',
            'payment_qty' => 'COALESCE(sobi.payment_qty, 0)',
            'payment_division' => 'CASE WHEN sobi.payment_division = \'T\' THEN \'Payment\' ELSE \'Cancellation\' END',
            'c_ins_user_name' => 'sobi.c_ins_user_name',
            'set_user_id' => 'sobi.ins_user_id',
            'set_user_ip' => 'sobi.ins_user_ip',
            'payment_date' => 'sobi.ins_timestamp'
        ], [
            $aParams['sort_key'] => $aParams['sort']
        ]);

        // WHERE clause search condition setting (field definition array, parameter array, search condition array)
        $aWhereFieldInfo = $this->getQueryWhere(constOrderBenefitItem::SCHEMA, $aParams, constOrderBenefitItem::CONDITION);

        // decryption
        $aDecryptColumn = commModelDes::getDecrypt([
            'sobi.c_buyer_name',
            'sobi.c_ins_user_name',
        ]);

        $sSql = "
            SELECT
              {$aSelectFieldInfo['sSelect']},
              {$aDecryptColumn['sobi.c_ins_user_name']} AS set_user_name,
              {$aDecryptColumn['sobi.c_buyer_name']} AS c_buyer_name,
              sobi.payment_division AS payment_division_type
            FROM
              t_sales_order_benefit_item AS sobi
            WHERE 1=1 {$aWhereFieldInfo['sAndWhere']}
            ORDER BY {$aSelectFieldInfo['sOrderBy']}
            {$aSelectFieldInfo['sLimit']}
        ";

        return $this->prepare($sSql, $aWhereFieldInfo['aAssign'], FW_MODEL_RESULT_ROWS);
    }
    
        
            
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