[minor](Nereids): rename func and add TODO.

[jackwener]

Proposed changes

Issue Number: close #xxx

Problem summary

• rename func
• add TODO.

Checklist(Required)

• Does it affect the original behavior
• Has unit tests been added
• Has document been added or modified
• Does it need to update dependencies
• Is this PR support rollback (If NO, please explain WHY)

Further comments

If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...

[jackwener]

run buildall

[hello-stephen]

TeamCity pipeline, clickbench performance test result:
the sum of best hot time: 32.62 seconds
stream load tsv: 425 seconds loaded 74807831229 Bytes, about 167 MB/s
stream load json: 20 seconds loaded 2358488459 Bytes, about 112 MB/s
stream load orc: 60 seconds loaded 1101869774 Bytes, about 17 MB/s
stream load parquet: 32 seconds loaded 861443392 Bytes, about 25 MB/s
https://doris-community-test-1308700295.cos.ap-hongkong.myqcloud.com/tmp/20230413075156_clickbench_pr_128480.html

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.