planner: fix incorrect TableDual plan built from nulleq (#24596)

[ti-srebot]

cherry-pick #24596 to release-5.0
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# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/24633

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---

What problem does this PR solve?

Issue Number: close #24477

Problem Summary:

What is changed and how it works?

What's Changed:

util/ranger/points.go

How it Works:

If year type col <=> null , values.ToInt64 in refineValueAndOp will return err.

Related changes

• PR to update pingcap/docs/pingcap/docs-cn:
• Need to cherry-pick to the release branch

Check List

Tests

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

Side effects

• Performance regression
  • Consumes more CPU
  • Consumes more MEM
• Breaking backward compatibility

Release note

• Fix a nulleq bug

[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

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

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• eurekaka
• winoros

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[xiongjiwei]

/merge

[ti-chi-bot]

@xiongjiwei: /merge is only allowed for the committers, you can assign this pull request to the committer in list by filling /assign @committer in the comment to help merge this pull request.

In response to this:

/merge

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[zhouqiang-cl]

/merge

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 0e92f01

[ti-chi-bot]

@ti-srebot: Your PR was out of date, I have automatically updated it for you.

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