Case Analysis of Multi-parameter efficiency of batch deletion of mybatis

Batch deletion of mybatis multi-parameter efficiency example analysis, I believe that many inexperienced people do not know what to do, so this paper summarizes the causes of the problem and solutions, through this article I hope you can solve this problem.

Recently, I have encountered the problem of deleting table data in batches and based on multiple parameters. In my case, I have a special parameter that is the same value, but I still use it as a general case. An experimental test has been done.

The code test is as follows:

Map param = new HashMap (); param.put ("userId", userId); List listJobIds = sysUserJobdel.stream (). Map (SysUserJob::getJobId). Distinct (). Collect (Collectors.toList ()); param.put ("jobIds", listJobIds); for (int I = 0; I < 10000; iTunes +) {SysUserJob userJob = new SysUserJob (); userJob.setJobId (String.valueOf (SystemUtils.nextId (); userJob.setUserId (userId); sysUserJobdel.add (userJob) ListJobIds.add (String.valueOf (SystemUtils.nextId ();} param.put ("jobIds", listJobIds); long begintime1 = System.currentTimeMillis (); sysUserMapper.deleteUserJobs (param); long endtime1 = System.currentTimeMillis (); long costTime1= (endtime1-begintime1); System.err.println ("costTime1====" + costTime1); long begintime2 = System.currentTimeMillis (); sysUserMapper.deleteUserJob (sysUserJobdel); long endtime2 = System.currentTimeMillis (); long costTime2= (endtime2-begintime2); System.err.println ("costTime2====" + costTime2) Long begintime3 = System.currentTimeMillis (); sysUserMapper.deletesUsersJobs (sysUserJobdel); long endtime3 = System.currentTimeMillis (); long costTime3= (endtime3-begintime3); System.err.println ("costTime3====" + costTime3) Delete from sys_user_job where user_id = # {userId} and job_id in# {item} delete from sys_user_job where (user_id = # {item.userId} and job_id= # {item.jobId}) delete from sys_user_job where (user_id,job_id) in (# {item.userId}, # {item.jobId})

Three result outputs:

CostTime1====173

CostTime2====1673

CostTime3====414

CostTime1====115

CostTime2====1523

CostTime3====391

CostTime1====105

CostTime2====1501

CostTime3====417

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