rdblue commented on code in PR #5303:
URL: https://github.com/apache/iceberg/pull/5303#discussion_r975759809
##########
python/tests/expressions/test_expressions_base.py:
##########
@@ -841,3 +924,290 @@ def test_not_expression_binding(unbound_not_expression,
expected_bound_expressio
"""Test that visiting an unbound NOT expression with a bind-visitor
returns the expected bound expression"""
bound_expression = base.visit(unbound_not_expression,
visitor=base.BindVisitor(schema=table_schema_simple))
assert bound_expression == expected_bound_expression
+
+
+def test_bound_boolean_expression_visitor_ignore_is_nan_for_string_type():
+ """Test ignoring IsNan expressions when the field type is a String"""
Review Comment:
This is suspicious. You can't bind `IsNaN` to a string, so this should never
happen. In addition, I don't see why the visitor would handle this any
differently. There may be a runtime failure because the expression is
improperly bound (users should never do this) but the visitor shouldn't simply
ignore it.
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