Mesut-Doner opened a new pull request, #4035:
URL: https://github.com/apache/doris-website/pull/4035
The version-3.x Routine Load manual documents `unique_key_update_mode`
(including `UPDATE_FLEXIBLE_COLUMNS`) as a job property and ships a full
"Flexible Partial Column Update" CREATE ROUTINE LOAD example. This feature does
not exist in any 3.x release.
On Doris 3.1.4, creating such a job fails at property validation:
ERROR 1105 (HY000): errCode = 2, detailMessage = unique_key_update_mode
is invalid property
`unique_key_update_mode` was added to Routine Load by apache/doris #59896
and #60128, merged to master in January 2026 and never backported to
branch-3.1. On branch-3.1 the property is absent from the Routine Load
whitelist (CreateRoutineLoadStmt.PROPERTIES_SET), so it is rejected at CREATE
before any BE involvement. The property exists only on the Stream Load path in
3.x (StreamLoadTask), which is why the Stream Load and partial-column-update
docs are unaffected.
Remove, from the English, Chinese, and Japanese version-3.x copies:
- the `unique_key_update_mode` row in the job_properties table
- the "Flexible Partial Column Update" example section
`partial_columns` (fixed-column partial update) is supported in 3.x Routine
Load and is left in place. The dev and 4.x docs are unchanged because the
feature exists there.
## Versions
- [ ] dev
- [ ] 4.x
- [ ] 3.x
- [ ] 2.1 or older (not covered by version/language sync gate)
## Languages
- [ ] Chinese
- [ ] English
- [ ] Japanese candidate translation needed
## Docs Checklist
- [ ] Checked by AI
- [ ] Test Cases Built
- [ ] Updated required version and language counterparts, or explained why
not
- [ ] If only one language changed, confirmed whether source/translation
counterparts need sync
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