englefly opened a new pull request, #64265:
URL: https://github.com/apache/doris/pull/64265
stripNullSuffixPaths() already contains the logic to remove [col.NULL] when
[col.OFFSET] covers the same prefix (lines 834-839), but it was only called in
the string-like and general branches, not in the array/map early-continue
branch. This caused queries like `SELECT cardinality(arr), arr IS NULL` to emit
redundant [arr.NULL] alongside [arr.OFFSET] in the access paths.
Fix: move stripNullSuffixPaths() call to line 278 (before all type-specific
early-continue branches) so it applies uniformly to all complex data types.
Add regression tests covering array root, map root, struct string subfield,
struct array subfield, and struct map subfield.
### What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
### Release note
None
### Check List (For Author)
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- [ ] 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?
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- [ ] Yes. <!-- Add document PR link here. eg:
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