liutang123 opened a new pull request, #66850:
URL: https://github.com/apache/doris/pull/66850
### What problem does this PR solve?
A table-format reader builds its schema-change tree from FE-supplied schema
info (history_schema_info, field-id mapping), so it can map a table column to a
file column that is not present in this file's physical parquet schema — for
example a column added by schema change whose default was never materialized
into the older data files.
Such a column was neither read nor filled: _init_read_columns walks the file
schema in physical order, so the column was silently dropped, and because
children_column_exists() reported it as present it was never classified as
fill-missing either. It then surfaced downstream as a 0-row column, tripping
the filter.size() == offsets.size() check in filter_block_internal.
Detect this case in _do_init_reader by checking the mapped file column
against the physical schema, and demote the column to a missing column so it is
filled with its default/null values.
Stack:
```text
F column_string.cpp:349] Check failed: filter.size() == offsets.size() (8160
vs. 0)
doris::ColumnStr<>::filter()
doris::ColumnNullable::filter()
doris::Block::filter_block_internal()
doris::RowGroupReader::next_batch()
doris::ParquetReader::get_next_block()
doris::HudiReader::get_next_block_inner()
doris::FileScanner::_get_block_wrapped()
...
```
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
### 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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