planner: just pop cte's handleHelper map out since it shouldn't be considered (#35854)

[ti-srebot]

cherry-pick #35854 to release-6.2
You can switch your code base to this Pull Request by using git-extras:

# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/36573

After apply modifications, you can push your change to this PR via:

git push git@github.com:ti-srebot/tidb.git pr/36573:release-6.2-1b848f40e2ee

---

Signed-off-by: AilinKid 314806019@qq.com

What problem does this PR solve?

Issue Number: close #35758

Problem Summary:

What is changed and how it works?

the handleHelper cache an essential handle info for a basic table for every select statement, while after building cte, we should pop it out, because the basic handle info for this select statement will be collected from the datasource when building the tableRef in the next step.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

planner: just pop cte's handleHelper map out since it shouldn't be considered

[ti-chi-bot]

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[ti-chi-bot]

@ti-srebot: This cherry pick PR is for a release branch and has not yet been approved by release team.
Adding the do-not-merge/cherry-pick-not-approved label.

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[ti-srebot]

/run-all-tests

[ti-srebot]

@AilinKid you're already a collaborator in bot's repo.

[sre-bot]

Code Coverage Details: https://codecov.io/github/pingcap/tidb/commit/7366100448afff1dd4dd32700fa60aad0561aba3

[xhebox]

closed for DMR version