alamb commented on code in PR #9790:
URL: https://github.com/apache/arrow-datafusion/pull/9790#discussion_r1541077135
##########
datafusion/sql/src/query.rs:
##########
@@ -283,3 +276,44 @@ impl<'a, S: ContextProvider> SqlToRel<'a, S> {
}
}
}
+
+/// Retrieves the constant result of an expression, evaluating it if possible.
+///
+/// This function takes an expression and an argument name as input and returns
+/// a `Result<i64>` indicating either the constant result of the expression or
an
+/// error if the expression cannot be evaluated.
+///
+/// # Arguments
+///
+/// * `expr` - An `Expr` representing the expression to evaluate.
+/// * `arg_name` - The name of the argument for error messages.
+///
+/// # Returns
+///
+/// * `Result<i64>` - An `Ok` variant containing the constant result if
evaluation is successful,
+/// or an `Err` variant containing an error message if evaluation fails.
+fn get_constant_result(expr: &Expr, arg_name: &str) -> Result<i64> {
+ match expr {
Review Comment:
I filed https://github.com/apache/arrow-datafusion/issues/9821 to track
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