planner: move base plan related output of core pkg and make it well-pkged

[AilinKid]

What problem does this PR solve?

Issue Number: ref #51664

Problem Summary:

What changed and how does it work?

move plan_base.go from core/ to core/base/
since PhysicalPlan definition depends on Task, we should move Task interface definition core/base/ here too
The general Task definition shouldn't rely on any concrete TaskImpl, so I remove the *RootTask as the return type inside Task interface.

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 @AilinKid. Thanks for your PR.

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[AilinKid]

/hold

[hawkingrei]

/ok-to-test

[AilinKid]

/unhold

[AilinKid]

/test unit-test

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[codecov]

Codecov Report

Merging #52529 (6351bfb) into master (3fff0f2) will increase coverage by 0.0914%.
Report is 11 commits behind head on master.
The diff coverage is 96.7142%.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #52529        +/-   ##
================================================
+ Coverage   74.1426%   74.2340%   +0.0914%     
================================================
  Files          1470       1470                
  Lines        354534     429389     +74855     
================================================
+ Hits         262861     318753     +55892     
- Misses        72435      90738     +18303     
- Partials      19238      19898       +660     

Flag	Coverage Δ
integration	48.9344% <82.1428%> (?)
unit	71.1925% <95.4285%> (-1.7113%)	⬇️

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

Components	Coverage Δ
dumpling	53.9957% <ø> (-2.3014%)	⬇️
parser	∅ <ø> (∅)
br	49.7359% <ø> (+7.0959%)	⬆️

[hi-rustin]

It seems we don't need to rename it.

[hi-rustin]

Can I ask why do we need to rename here?

[AilinKid]

there is another core pkg in the import list here, oh! for this file, its not, I will change it back to base

[AilinKid]

nice catch

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-04-12 06:41:46.836802372 +0000 UTC m=+1203768.364342917: ☑️ agreed by hawkingrei.
• 2024-04-15 09:42:07.761223769 +0000 UTC m=+244746.872270218: ☑️ agreed by Defined2014.

[lance6716]

/approve

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Defined2014, hawkingrei, hi-rustin, lance6716

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Needs approval from an approver in each of these files:

• OWNERS [Defined2014,hawkingrei,hi-rustin,lance6716]
• pkg/executor/importer/OWNERS [lance6716]
• pkg/planner/OWNERS [hawkingrei,hi-rustin]

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