Refine window function codes

[xzhangxian1008]

What problem does this PR solve?

Issue Number: ref #7376

Problem Summary:

What is changed and how it works?

Check List

Tests

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

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

None

[xzhangxian1008]

/cc @guo-shaoge

[xzhangxian1008]

/cc @windtalker

[windtalker]

lgtm

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: guo-shaoge, windtalker

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[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2025-01-20 08:47:07.390719805 +0000 UTC m=+84154.721639208: ☑️ agreed by windtalker.
• 2025-01-20 09:46:13.531249136 +0000 UTC m=+87700.862168539: ☑️ agreed by guo-shaoge.

[ti-chi-bot]

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At the same time I will also trigger all tests for you:

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