TsukiokaKogane opened a new pull request, #69585:
URL: https://github.com/apache/doris/pull/69585
### What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
Changelog execution currently infers current/before column relationships
from column names and physical positions. This couples read projection and
write processing to the storage layout, while publish retries and recovery lack
an explicit, transaction-bound mapping contract.
This PR introduces structured column mappings across FE and BE:
- FE generates slot pairs for reads and immutable UID mappings for writes.
- Write mappings are bound to actual transaction IDs, frozen at precommit or
commit, and retained for replay and lagging-replica republish.
- Remote commit, asynchronous publish, and Cloud transaction contexts carry
the same write-time snapshots.
- BE resolves UID mappings into schema-bound column positions once per write
or publish operation. Scanner translates read slot pairs into ReadSchema
ordinals.
The change removes execution-time relationship inference, preserves key-only
historical lookup and complete-row comparison for MIN_DELTA, and validates
mappings before publication. Ordinary writes do not require changelog mappings.
Mixed-version compatibility adapters are outside the scope of this PR.
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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