dumpling: fix dump failed when sequence exists (#30164)

[ti-srebot]

cherry-pick #30164 to release-5.3
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# In tidb repo:
git pr https://github.com/pingcap/tidb/pull/30877

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git push git@github.com:ti-srebot/tidb.git pr/30877:release-5.3-9d307b00ae86

---

What problem does this PR solve?

Issue Number: close #30149
Problem Summary:

What is changed and how it works?

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

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• lichunzhu
• sylzd

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[ti-srebot]

/run-all-tests

[ti-srebot]

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

[sylzd]

/merge

[ti-chi-bot]

@sylzd: /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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[lichunzhu]

/merge

[ti-chi-bot]

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

Commit hash: b3666b7

[lichunzhu]

/assign nongfushanquan

[ti-chi-bot]

@lichunzhu: GitHub didn't allow me to assign the following users: nongfushanquan.

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In response to this:

/assign nongfushanquan

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[purelind]

/run-mysql-test

[lichunzhu]

/run-mysql-test

[lichunzhu]

/run-mysql-test

[ti-chi-bot]

@ti-srebot: Your PR was out of date, I have automatically updated it for you.

At the same time I will also trigger all tests for you:

/run-all-tests

If the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

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