suxiaogang223 opened a new pull request, #67164:
URL: https://github.com/apache/doris/pull/67164
### What problem does this PR solve?
Issue Number: None
Related PR: #66835
Problem Summary:
Table-format predicate probes can reference a column that is not registered
in the schema tree. `StructNode::children_column_exists()` assumed every probe
had an entry, so an absent key triggered a DCHECK in debug builds or
`std::out_of_range` in release builds and terminated the BE process.
This change treats an unregistered child as unavailable for file-level
processing while preserving `has_children_column()` for callers that need to
distinguish an FE/BE schema-contract mismatch from a file-missing column. The
unit test covers present, known-missing, and unregistered children.
### Release note
Prevent a BE abort when table-format processing probes a column absent from
the schema tree.
### Check List (For Author)
- Test:
- No local BE build or unit test was run per the requested validation
boundary.
- `build-support/clang-format.sh` passed with clang-format 16.
- `build-support/check-format.sh` passed with clang-format 16.
- `build-support/check-build-hygiene.sh` passed.
- `git diff --check` passed.
- Behavior changed: Yes. An unregistered schema-tree child now reports
unavailable instead of terminating the BE process.
- Does this need documentation: No
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