planner: add projections to keep join keys as col=col (#52989)

[ti-chi-bot]

This is an automated cherry-pick of #52989

What problem does this PR solve?

Issue Number: close #46556

Problem Summary: planner: add projections to keep join keys as col=col

What changed and how does it work?

In some cases, after creating new EQ function, the 2 args might not be column anymore, which breaks the assumption that join eq keys must be col=col, to handle this, inject 2 projections.

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

[elsa0520]

LGTM

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-05-16 06:16:21.132079428 +0000 UTC m=+1720334.889215000: ☑️ agreed by qw4990.
• 2024-05-16 06:20:49.856405523 +0000 UTC m=+1720603.613541139: ☑️ agreed by elsa0520.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: elsa0520, hawkingrei, qw4990, winoros

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (release-8.1@ff5eb17). Click here to learn what that means.

Additional details and impacted files

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##             release-8.1     #53326   +/-   ##
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Flag	Coverage Δ
unit	71.1706% <100.0000%> (?)

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Components	Coverage Δ
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parser	∅ <0.0000%> (?)
br	40.9738% <0.0000%> (?)