kumarUjjawal commented on code in PR #19739:
URL: https://github.com/apache/datafusion/pull/19739#discussion_r2717944539
##########
datafusion/substrait/src/logical_plan/producer/expr/field_reference.rs:
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@@ -76,6 +76,22 @@ pub(crate) fn try_to_substrait_field_reference(
}
}
+/// Convert an outer reference column to a Substrait field reference.
+/// Outer reference columns reference columns from an outer query scope in
correlated subqueries.
+/// We convert them the same way as regular columns since the subquery plan
will be
+/// reconstructed with the proper schema context during consumption.
+pub fn from_outer_reference_column(
Review Comment:
Yes true.
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