importinto: add disable_precheck option & change default threadcnt when import from select

[D3Hunter]

What problem does this PR solve?

Issue Number: ref #49883

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.

None

[tiprow]

Hi @D3Hunter. Thanks for your PR.

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[codecov]

Codecov Report

Merging #51077 (130e986) into master (2437633) will increase coverage by 1.6408%.
Report is 3 commits behind head on master.
The diff coverage is 100.0000%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #51077        +/-   ##
================================================
+ Coverage   70.5906%   72.2315%   +1.6408%     
================================================
  Files          1467       1467                
  Lines        434971     437910      +2939     
================================================
+ Hits         307049     316309      +9260     
+ Misses       108685     101948      -6737     
- Partials      19237      19653       +416     

Flag	Coverage Δ
integration	47.3693% <100.0000%> (?)
unit	70.3016% <100.0000%> (-0.0961%)	⬇️

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

Components	Coverage Δ
dumpling	54.2940% <ø> (ø)
parser	∅ <ø> (∅)
br	47.6585% <ø> (+1.8299%)	⬆️

[Benjamin2037]

LGTM

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Benjamin2037, lance6716

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• OWNERS [Benjamin2037,lance6716]
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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-02-08 08:33:32.46914768 +0000 UTC m=+432138.035917570: ☑️ agreed by lance6716.
• 2024-02-08 08:50:29.444729244 +0000 UTC m=+433155.011499136: ☑️ agreed by Benjamin2037.

[tiprow]

@D3Hunter: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
tiprow_fast_test	c19590b	link	true	/test tiprow_fast_test

Full PR test history. Your PR dashboard.

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