rdblue commented on code in PR #4679:
URL: https://github.com/apache/iceberg/pull/4679#discussion_r865150841
##########
python/src/iceberg/expressions/base.py:
##########
@@ -328,3 +329,49 @@ def eval(self, struct: StructProtocol) -> Any:
Any: The value at the referenced field's position in `struct`
"""
return self._accessor.get(struct)
+
+
+class UnboundReference:
+ """A reference not yet bound to a field in a schema
+
+ Args:
+ name (str): The name of the field
Review Comment:
There aren't spec requirements for field names. In the implementations, we
index using `.` to join the names so that you can easily project names like
`a.b`.
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