[fengys1996]

What changed

• Clarify JSON2 type hints and supported options.
• Explain return type inference for json_get and dot syntax.
• Document changing JSON2 column settings with ALTER TABLE.
• Update SQL examples and align English and Chinese documentation.

Scope

• Documentation versions: Nightly
• Languages: English, Chinese

Verification

Checklist

• I verified the content against the applicable GreptimeDB version.
• I updated the relevant documentation versions and languages, or explained why not.
• I checked changed links and anchors.
• I updated navigation when the document structure changed.

[MichaelScofield]

@codex review

[Copilot]

Copilot review overview

🟡 Changes recommended

Preserve the published legacy anchors in the JSON2 documentation.

Get a fresh assessment by requesting another Copilot review.

Review effort: Lite
Findings: 4

Open (4)

• Preserve legacy JSON field type hints anchor · New
• Preserve legacy syntax anchor · New
• Preserve legacy json_get UDF anchor · New
• Retain future roadmap anchor alias · New

What changed in this PR

Updates Nightly JSON2 documentation in English and Chinese, including syntax, type hints, querying, pipeline options, and ALTER TABLE behavior.

Changes:

• Revised JSON2 usage and configuration guidance.
• Updated pipeline type-hint documentation.
• Added JSON2 configuration alteration references.

File	Summary
i18n/​zh/​docusaurus-plugin-content-docs/​current/​user-guide/​logs/​json2.md	Updated Chinese JSON2 guide.
i18n/​zh/​docusaurus-plugin-content-docs/​current/​reference/​sql/​alter.md	Added Chinese JSON2 ALTER documentation.
i18n/​zh/​docusaurus-plugin-content-docs/​current/​reference/​pipeline/​pipeline-config.md	Updated Chinese pipeline options.
docs/​user-guide/​logs/​json2.md	Updated English JSON2 guide.
docs/​reference/​sql/​alter.md	Added English JSON2 ALTER documentation.
docs/​reference/​pipeline/​pipeline-config.md	Updated English pipeline options.

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[MichaelScofield]

Reviewed all 6 changed Nightly documentation files (276 additions / 104 deletions), including English/Chinese alignment, links and heading compatibility, and the JSON2 claims against current upstream source and SQLness expectations.

Found one additional P2 technical issue below: explicit json_get calls do not inherit column type hints in the same way as dot syntax.

The existing anchor findings also apply: retain json-field-type-hints in English and 语法, json-字段-type-hint, json_get-udf, and 未来规划 in Chinese. I have not duplicated those inline threads.

Verification: the PR's build and both strict locale link checks are green. This was a source/test-expectation review; I did not rerun the site builds or execute the SQL examples locally. No repository files were changed.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-10T08:13:02.718411Z	985c072	Draft marked ready

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[chatgpt-codex-connector]

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Reviewed commit: 985c072caf

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