0AyanamiRei opened a new pull request, #67408:
URL: https://github.com/apache/doris/pull/67408
### What problem does this PR solve?
Issue Number: None
Related PR: None
Problem Summary: A file table-valued function could append a path partition
column whose name already existed in the inferred file schema. The duplicate
schema made direct column references ambiguous and allowed `SELECT *` to reach
an internal backend error. Reject case-insensitive conflicts while constructing
the schema so the invalid configuration fails during analysis.
### Release note
File table-valued functions now reject path partition columns that conflict
with existing file columns.
### Check List (For Author)
- Test: Regression test and manual test
- Regression test: `test_path_partition_column_collision`
- Manual test: `DESC FUNCTION` and `SELECT *` with a conflicting local
CSV path partition
- Behavior changed: Yes. Conflicting path partition columns now return a
clear analysis error.
- Does this need documentation: No
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