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Fix wording to reflect poor performance of initial query before optimization (#20840) #21267

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This is an automated cherry-pick of #20840

What is changed, added or deleted? (Required)

Fix wording in the explain walkthrough, the current working seems to imply that the initial performance is good (which it is not). The rest of the walkthrough is to improve the performance, so the changed wording seems more correct.

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@ti-chi-bot ti-chi-bot added contribution This PR is from a community contributor. first-time-contributor Indicates that the PR was contributed by an external member and is a first-time contributor. lgtm ok-to-test Indicates a PR is ready to be tested. size/XS Denotes a PR that changes 0-9 lines, ignoring generated files. type/cherry-pick-for-release-8.5 This PR is cherry-picked to release-8.5 from a source PR. labels Jun 27, 2025
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Summary of Changes

Hello @ti-chi-bot, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on a minor but important textual correction within the explain-walkthrough documentation. The change ensures that the initial state of an example query's performance is accurately described as 'not ideal', setting a more appropriate context for the subsequent steps that demonstrate query optimization techniques.

Highlights

  • Documentation Clarity: I've updated the explain-walkthrough.md file to accurately reflect the initial performance of an example query. The previous wording implied 'ideal performance' for a query that takes 1.03 seconds, which is misleading given the context of the walkthrough aiming to improve performance. The text now correctly states it's 'not ideal performance'.
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Code Review

This pull request fixes the wording in the EXPLAIN walkthrough to correctly state that the initial query performance is poor, which sets the context for the subsequent optimization steps. The change is correct and improves the logical flow of the document. I've suggested a minor wording tweak to further enhance clarity and readability.

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qiancai commented Jun 27, 2025

/approve

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ti-chi-bot bot commented Jun 27, 2025

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: qiancai

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@ti-chi-bot ti-chi-bot bot added the approved label Jun 27, 2025
@ti-chi-bot ti-chi-bot bot merged commit 46c6fad into pingcap:release-8.5 Jun 27, 2025
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3 participants