mysql 統計表的數量

1. 創建存儲過程，具體代碼如下

CREATE DEFINER=`root`@`localhost` PROCEDURE `p_cal_count`( )
BEGIN

    /*---------------------------------------------------------
   -- 庫\表：`beststock`.`t_count`
   -- 功能： 定期統計各表的數據量
   -- 入參： 
     -- 出參： 
   -- added by Bruce He 7/21/2020
   -- modified by 
-----------------------------------------------------------*/
    /*用於判斷是否結束循環*/
  declare done int default 0;
    
    /*存儲表名稱的變量*/
    declare curtable VARCHAR(200);
    
    /*獲取所有符合條件的表名稱，並存入變量 tbs_list*/
    declare tbs_list cursor for select table_name from information_schema.`TABLES` where table_schema='beststock' and (table_name like 'ts%' or table_name like 'rim%');
    
    /*定義 設置循環結束標識done值怎么改變 的邏輯*/
    declare continue handler for not found set done =1;
    
    
    open tbs_list;
    
    /* 循環開始 */
    REPEAT
    
    fetch tbs_list into curtable;
    
    if not done then 
    
            /* 初始化 0 */
            set @v_count = 0;

            /* 動態語句執行 */
            set @sqlscript = concat('select count(1) into @v_count from ', curtable);
            prepare tem from @sqlscript;
            execute tem;

            insert into beststock.t_count (tablename, count, date) values (curtable, @v_count, CURRENT_DATE);
            
            deallocate prepare tem; 

        
    end if;

UNTIL done END REPEAT;

close tbs_list;

END

 

2. 開啟定時任務；

-- 查看定時任務是否開啟；ON 開啟， OFF 未開啟
show variables like '%schedule%';

-- 開啟定時任務
set global event_scheduler = 1;

 

3. 設置定時任務事件