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  • mysql 光标使用

    DROP PROCEDURE
    IF EXISTS `InitFactorSignal`;
    DELIMITER ;;
    
    CREATE PROCEDURE `InitFactorSignal`()
    BEGIN
        DECLARE t_error INTEGER DEFAULT 0;   
       
            DECLARE v_id VARCHAR(255); 
            DECLARE d_factor DECIMAL(5,2); 
            DECLARE d_startdate datetime; 
            DECLARE d_enddate datetime; 
            DECLARE cur_factor CURSOR FOR SELECT cid, cstarttime,cendtime,cfactornum from tb_plo_artificialfactor; 
          DECLARE EXIT HANDLER FOR NOT FOUND CLOSE cur_factor;
            DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET t_error=1;
            
        START TRANSACTION;
            
            open cur_factor;
            
            REPEAT  FETCH cur_factor into v_id, d_startdate,d_enddate,d_factor;
            
            INSERT INTO `efquantitativetrading`.`tb_plo_factorsignal`(`cid`, `cuorgcode`, `ccreatorid`, `ccreatetime`, `clastupdateuserid`, `clastupdatetime`, `cartificialfactorid`, `csignaldatetime`, `cfactornum`)
        VALUES (replace(uuid(), '-', ''), NULL, NULL, NULL, NULL, NULL, v_id, d_startdate, d_factor);
    
            INSERT INTO `efquantitativetrading`.`tb_plo_factorsignal`(`cid`, `cuorgcode`, `ccreatorid`, `ccreatetime`, `clastupdateuserid`, `clastupdatetime`, `cartificialfactorid`, `csignaldatetime`, `cfactornum`)
        VALUES (replace(uuid(), '-', ''), NULL, NULL, NULL, NULL, NULL, v_id, date_add(d_enddate, interval 1 second) , 0);
        
                            
                        
       UNTIL 0 END REPEAT;
         
            
             
            close  cur_factor;
         
      IF t_error = 1 THEN    
                ROLLBACK;    
            ELSE    
                COMMIT;    
            END IF;    
       select t_error;   
    
    END
    ;;
    DELIMITER ;
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  • 原文地址:https://www.cnblogs.com/shiding/p/15186637.html
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