server: make field types for blob types match mysql

[dveeden]

What problem does this PR solve?

Issue Number: close #60195

Problem Summary:

What changed and how does it work?

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.

The field type in the network protocol for blob types was changed to match MySQL.

[tiprow]

Hi @dveeden. Thanks for your PR.

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[dveeden]

/ok-to-test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.5474%. Comparing base (37855f9) to head (6c5976b).
Report is 639 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #60196        +/-   ##
================================================
+ Coverage   73.1457%   73.5474%   +0.4016%     
================================================
  Files          1708       1708                
  Lines        471683     471818       +135     
================================================
+ Hits         345016     347010      +1994     
+ Misses       105469     103592      -1877     
- Partials      21198      21216        +18     

Flag	Coverage Δ
integration	42.7697% <100.0000%> (?)
unit	72.3267% <0.0000%> (-0.0251%)	⬇️

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

Components	Coverage Δ
dumpling	52.6910% <ø> (ø)
parser	∅ <ø> (∅)
br	47.2537% <ø> (+0.0416%)	⬆️

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hawkingrei, lance6716

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-03-24 06:32:15.562412654 +0000 UTC m=+855629.246648735: ☑️ agreed by hawkingrei.
• 2025-03-24 10:40:23.855857655 +0000 UTC m=+870517.540093749: ☑️ agreed by lance6716.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.5: #62281.