executor: fix show table status for the database with upper-cased name (#23896)

[ti-srebot]

cherry-pick #23896 to release-4.0
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/23958

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

git push git@github.com:ti-srebot/tidb.git pr/23958:release-4.0-dbd5a3622a53

---

Signed-off-by: Shuaipeng Yu jackysp@gmail.com

What problem does this PR solve?

Issue Number: close #xxx

Problem Summary:
show table status does not work for a database with upper-cased name.

What is changed and how it works?

Proposal: xxx

What's Changed:

How it Works:
Fix it. Introduced by #22644

Related changes

• Need to cherry-pick to the release branch

Check List

Tests

• Unit test

Release note

• fix show table status for the database with upper-cased name.

[ti-srebot]

/run-all-tests

[ti-srebot]

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

[xhebox]

LGTM

[jackysp]

PTAL @morgo @xiongjiwei

[morgo]

/LGTM

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• morgo
• xhebox

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[morgo]

/run-check_dev

[jackysp]

/merge

[ti-chi-bot]

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

Commit hash: 38ac074

[tiancaiamao]

/run-all-tests

[jackysp]

/run-check_release_note

[jackysp]

/run-integration-br-test

[zhouqiang-cl]

/run-integration-br-test

[zhouqiang-cl]

/merge

[jackysp]

/run-check_dev

[ti-chi-bot]

@ti-srebot: Your PR was out of date, I have automatically updated it for you.

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