stale read: update the description of tidb_external_ts (#20667) #20727
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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!
Summary of Changes
This pull request updates the description in stale-read.md to include tidb_enable_external_ts_read when specifying an exact point in time for stale reads using tidb_external_ts. This change clarifies that both tidb_external_ts and tidb_enable_external_ts_read system variables are needed. This PR is an automated cherry-pick of #20667 and applies to multiple versions: master, v9.0, v8.5, v8.4, and v8.3.
Highlights
- Documentation Update: The documentation for stale reads is updated to include
tidb_enable_external_ts_readalongsidetidb_external_ts. - Clarity: The change improves clarity by explicitly stating that both system variables are required for specifying an exact point in time for stale reads.
Changelog
- stale-read.md
- Updated the description to include
tidb_enable_external_ts_readwhen usingtidb_external_tsfor stale reads.
- Updated the description to include
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A stale read's gentle art,
Time's passage, a world apart.
Two variables align,
For a point in time,
A snapshot to restart.
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Code Review
The pull request updates the description of tidb_external_ts in stale-read.md. The change adds tidb_enable_external_ts_read to the description. The pull request also cherry-picks the changes to multiple versions.
Summary of Findings
- Completeness of Description: The description of
tidb_external_tsshould include the necessity of settingtidb_enable_external_ts_readtoONfor it to take effect. This ensures users understand the complete process for usingtidb_external_ts.
Merge Readiness
The pull request is ready to be merged after addressing the medium severity issue. The change is small and focused on improving the documentation.
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/approve |
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: Oreoxmt The full list of commands accepted by this bot can be found here. The pull request process is described here
Needs approval from an approver in each of these files:
Approvers can indicate their approval by writing |
This is an automated cherry-pick of #20667
What is changed, added or deleted? (Required)
close #20611
Which TiDB version(s) do your changes apply to? (Required)
Tips for choosing the affected version(s):
By default, CHOOSE MASTER ONLY so your changes will be applied to the next TiDB major or minor releases. If your PR involves a product feature behavior change or a compatibility change, CHOOSE THE AFFECTED RELEASE BRANCH(ES) AND MASTER.
For details, see tips for choosing the affected versions.
What is the related PR or file link(s)?
Do your changes match any of the following descriptions?