Open
Description
Describe the bug
~8 sqllogictest cases are failing in Substrait round-trip mode because of the following error:
query failed: DataFusion error: Schema error: Schema contains duplicate qualified field name alltypes_plain.int_col
To Reproduce
cargo test --test sqllogictests -- --substrait-round-trip intersection.slt:33
Expected behavior
The sqllogictest passes in Substrait round-trip mode
Additional context
This is part of a broader initiative to improve the reliability of Substrait-to-DataFusion logical plan conversions.