Weijun-H commented on code in PR #15209:
URL: https://github.com/apache/datafusion/pull/15209#discussion_r1994893409
##########
datafusion/sql/src/expr/unary_op.rs:
##########
@@ -45,7 +45,13 @@ impl<S: ContextProvider> SqlToRel<'_, S> {
{
Ok(operand)
} else {
- plan_err!("Unary operator '+' only supports numeric,
interval and timestamp types")
+ plan_err!("Unary operator '+' only supports numeric,
interval and timestamp types").map_err(|e| {
+ let spans = operand.spans();
+ let span = if let Some(s) = spans.as_ref() { s.first()
} else { None };
+ let diagnostic =
+ Diagnostic::new_error("Unary operator '+' only
supports numeric, interval and timestamp types".to_string(), span);
+ e.with_diagnostic(diagnostic)
Review Comment:
Could we add a note or help here, such as `Try using arrow_cast to convert
the value to a numeric, interval, or timestamp type`?
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