ddl: fix a bug that create two views with same name success (#58770)

[ti-chi-bot]

This is an automated cherry-pick of #58770

What problem does this PR solve?

Issue Number: close #58769

Problem Summary:

What changed and how does it work?

After one 'create view' ddl job delivered (queuing), the another create view ddl job come.
The check for table name duplicated is incorrect.

When old table exists and there is no or replace, it should report error.

Check List

Tests

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

  • I checked and no code files have been changed.

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.

None

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (release-7.5@1f0d8ff). Learn more about missing BASE report.

Additional details and impacted files

@@               Coverage Diff                @@
##             release-7.5     #59370   +/-   ##
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  Coverage               ?   72.2267%           
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  Files                  ?       1417           
  Lines                  ?     414280           
  Branches               ?          0           
================================================
  Hits                   ?     299221           
  Misses                 ?      95075           
  Partials               ?      19984           

Flag	Coverage Δ
unit	72.2267% <100.0000%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	52.9400% <0.0000%> (?)
parser	∅ <0.0000%> (?)
br	53.4309% <0.0000%> (?)

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-02-25 03:00:21.564264543 +0000 UTC m=+324769.517422809: ☑️ agreed by tiancaiamao.
• 2025-02-25 05:16:08.528564624 +0000 UTC m=+332916.481722889: ☑️ agreed by D3Hunter.

[tiancaiamao]

/merge

[ti-chi-bot]

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[tiancaiamao]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: D3Hunter, tangenta, tiancaiamao

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