Acfboy commented on code in PR #20383:
URL: https://github.com/apache/datafusion/pull/20383#discussion_r2813136893
##########
datafusion/expr/src/expr_schema.rs:
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@@ -697,6 +716,13 @@ pub fn cast_subquery(subquery: Subquery, cast_to_type:
&DataType) -> Result<Subq
})
}
+/// Determine whether the given data type `dt` supports the negation operator.
+///
+/// Negation is supported for numeric, interval, timestamp types, and null.
+pub fn is_negatable(dt: &DataType) -> bool {
Review Comment:
Sorry for my oversight.
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