zclllyybb commented on issue #3902:
URL: https://github.com/apache/doris-website/issues/3902#issuecomment-4610156068

   Breakwater-GitHub-Analysis-Slot: slot_ae4547a941ce
   
   I checked the live issue and refreshed `apache/doris-website` 
`upstream/master` before reviewing the docs tree. The report looks valid.
   
   Evidence from the current docs repository:
   
   - `running-difference.md` exists in 2.1 and 3.x only under 
`i18n/zh-CN/docusaurus-plugin-content-docs/version-{2.1,3.x}/.../numeric-functions/`.
   - There is no matching English `versioned_docs/version-2.1` or 
`versioned_docs/version-3.x` page, and I did not find a current/dev or 
version-4.x `running-difference` page.
   - The sidebar references I found are only for the older 1.2 and 2.0 pages, 
not for the 2.1/3.x zh-CN files, so these 2.1/3.x files appear to be orphaned 
localized content.
   - The remaining 2.1/3.x zh-CN pages explicitly describe the function as 
unstable and deprecated, and the `FROM t` comparison snippet is illustrative 
but not runnable because `t`, `x`, and `k` are not defined.
   
   My recommendation is to remove the two orphaned zh-CN pages from version-2.1 
and version-3.x. That keeps 2.1/3.x consistent with current/dev and 4.x, and 
avoids investing new example work in a deprecated function whose documented 
behavior is order-dependent.
   
   If maintainers prefer to keep historical documentation for this deprecated 
function in 2.1/3.x, then the safer fallback is not just adding a missing 
table. The page should also mark the `FROM t` snippet as 
illustrative/non-runnable and either remove the printed 
`running_difference_test` outputs or rework the examples around deterministic 
window-function replacements.
   
   I did not find an open PR for `running-difference` / #3902 at the time of 
review. No runtime logs or profiles are needed for this issue; the only missing 
decision is the docs policy choice: remove these deprecated orphaned localized 
pages, or keep them and rewrite the examples accordingly.
   


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