eldenmoon opened a new pull request, #67022:
URL: https://github.com/apache/doris/pull/67022
### What problem does this PR solve?
Issue Number: None
Related PR: #66575
Problem Summary:
This is a branch-4.1-specific regression. The Variant explode access-path
logic introduced by #66575 conservatively preserves the whole input container.
That fallback remains necessary for ordinary Variant columns because a
generator may change the container kind, but it drops the exact leaf paths
required by NestedGroup storage.
This change keeps ordinary Variant behavior unchanged and propagates exact
output suffixes only when Variant NestedGroup is enabled. It covers both unary
and multi-argument explode.
Red/green evidence:
- Before the source fix, both new NestedGroup tests failed because the
expected leaf paths were absent.
- After the fix, `VariantPruningLogicTest` passed 14/14.
- Related baseline `PruneNestedColumnTest` passed 39/39.
### Check List
- Test
- [x] Unit Test
- [ ] Regression Test
- Behavior changed
- [ ] User-visible behavior changed
### Release note
None
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