Mysql 使用游标更新大量数据

DROP PROCEDURE  if exists updateExecute;

-- 创建存储过程
delimiter $
create procedure updateExecute()
begin
  declare cnt int DEFAULT 1000;
  declare i int default 0;
  DECLARE gfgl_code VARCHAR(50) DEFAULT '';
  DECLARE F_01 VARCHAR(6) DEFAULT '';
  DECLARE F_02 VARCHAR(6) DEFAULT '';
  declare class_id int default 0;
  
  declare getgoods cursor for select `编码`, F01, F02 from `gfgl`.`bm_zrmx_wz` LIMIT 0, 1000;
  -- select count(*) into cnt from `gfgl`.`bm_zrmx_wz` LIMIT 1, 1000;
  open getgoods;
  repeat 
    fetch getgoods INTO gfgl_code, F_01, F_02;
    
    SELECT id INTO class_id FROM OilGoodsAptitudeClass a WHERE a.Code=gfgl_code;
    
  UPDATE OilGoodsAptitude b SET
   b.F01=(case F_01 when '是' then '1' ELSE '' END),
   b.F02='1',
   b.F03='1',
   b.F04=(case F_04 when '是' then '1' ELSE '' END)
   WHERE b.ClassId=class_id;

  set i:= i+1;
  until i >= cnt end repeat;
  close getgoods;
END$

call updateExecute()

参考：

https://www.jb51.net/article/164679.htm

b表是我要更新的表，a表和gfgl表是去取数据的表