Question

这是我的程序，我不知道如何在游标中使用批量收集，我们可以批量处理游标数据。请帮助我，谢谢！

CREATE PROCEDURE PROC_AUTOACTIVE
BEGIN ATOMIC
DECLARE v_sql VARCHAR(800);
DECLARE v_customer_id BIGINT;
DECLARE v_cardnum varchar(500);
DECLARE v_cardtype varchar(20);
DECLARE v_status varchar(10);
DECLARE v_lastname varchar(200);
DECLARE v_email varchar(150);
DECLARE v_mobile varchar(30);
DECLARE v_phone varchar(30);
DECLARE v_zipcode varchar(20);
DECLARE v_crm_mobile varchar(30);
DECLARE v_address varchar(500);
DECLARE v_order_count BIGINT;
DECLARE v_order_no varchar(500);
DECLARE not_found CONDITION FOR SQLSTATE '02000';
DECLARE at_end INT DEFAULT 0; 
DECLARE c_customers CURSOR  FOR s_cardsinfo;
DECLARE CONTINUE HANDLER FOR not_found SET at_end = 1;

SET v_sql = 'select t.customer_id, v.CUSTOMER_ID, v.CARD_TYPE, v.STATUS
               from customer_tempcard t,
                    vip_fields v 
               where t.tempcard_num=v.CUSTOMER_ID 
                 and t.status=1 
                 and v.STATUS=1 
                 and exists (select id 
                               from orders o 
                               where o.FK_CUSTOMER=t.CUSTOMER_ID
                                 and o.FK_ORDER_STATUS in (3,4,6)) ';
  PREPARE s_cardsinfo FROM v_sql;
  OPEN c_customers;
  --fetch card info
      LOOP_CUSTOMER_INFO:
      LOOP
        FETCH c_customers INTO v_customer_id,v_cardnum,v_cardtype,v_status;
        IF at_end <> 0 THEN
          SET at_end = 0;
          LEAVE LOOP_CUSTOMER_INFO;
        END IF;

          select c.LOGON_ID, o.DEV_CUSTOMER_NAME, 
                 o.DEV_MOBILE, o.DEV_PHONE, o.DEV_ZIP, o.DEV_ADDRESS, o.ORDER_NO
            into v_email, v_lastname,
                 v_mobile, v_phone, v_zipcode, v_address, v_order_no
            from orders o,customer c
            where o.FK_CUSTOMER=c.ID
              and o.FK_CUSTOMER=v_customer_id
              and o.FK_ORDER_STATUS in (3,4,6)
            order by o.ID desc
            fetch first 1 rows only;
          IF v_mobile <> null THEN
            SET v_crm_mobile = v_mobile;
          ELSE
            SET v_crm_mobile = v_phone;
          END IF;
          update customer_tempcard ct
            set ct.STATUS='0',
                ct.UPDATE_TIME=current_timestamp
              where ct.CUSTOMER_ID=v_customer_id;

          update card_store cs 
            set cs.STATUS='0',
                cs.UPDATE_TIME=current_timestamp
            where cs.CARD_NUM=v_cardnum;

          update vip_fields v
            set v.LAST_NAME=v_lastname,
                v.EMAIL=v_email, v.MOBILE=v_crm_mobile,
                v.CUSTOMER_UPDATE_TIME=current_timestamp,
                v.UPDATE_TIME=current_timestamp,
                v.OPERATION_TYPE='2',
                v.CREATE_SOURCE='2',
                v.STATUS='0',
                v.ZIP_CODE=v_zipcode,
                v.ADDRESS=v_address
            where customer_id = v_cardnum;

          update customer c
            set c.VIP_CARD_NUMBER=v_cardnum,
                c.VIP_CARD_NAME=v_lastname,
                c.VIP_EMAIL=v_email,
                c.VIP_CARD_TYPE=v_cardtype,
                c.LEVEL=v_cardtype,
                c.VIP_ZIP=v_zipcode,
                c.VIP_MOBILE=v_crm_mobile,
                c.VIP_ADDRESS=v_address,
                c.FK_CUSTOMER_GRADE='1' 
            where c.id=v_customer_id;

          insert into beactiveinfo
            values (default,v_cardnum,v_order_no,current_timestamp);
      END LOOP;
      CLOSE c_customers;
END

Answer 1

BULK COLLECT是DB2中Oracle兼容性功能的一部分，因此，首先，您不能在您在过程中使用的DB2 SQL PL本机上下文中使用它。其次，您不在游标中使用BULK COLLECT。您使用SELECT ... BULK COLLECT INTO an_array_variable ...填充PL / SQL数组。如果您打算循环遍历该数组，则不会获得超过游标的任何性能优势，同时会产生将整个结果集存储在应用程序内存中的内存开销。

如何在db2游标中使用批量收集

1 个答案: