Jefffrey commented on code in PR #19675:
URL: https://github.com/apache/datafusion/pull/19675#discussion_r2749152501
##########
datafusion/functions/src/datetime/now.rs:
##########
@@ -112,26 +111,11 @@ impl ScalarUDFImpl for NowFunc {
internal_err!("return_field_from_args should be called instead")
}
- fn invoke_with_args(
- &self,
- _args: datafusion_expr::ScalarFunctionArgs,
- ) -> Result<ColumnarValue> {
- internal_err!("invoke should not be called on a simplified now()
function")
- }
-
- fn simplify(
- &self,
- _args: Vec<Expr>,
- info: &dyn SimplifyInfo,
- ) -> Result<ExprSimplifyResult> {
- let now_ts = info
- .execution_props()
- .query_execution_start_time
- .timestamp_nanos_opt();
-
- Ok(ExprSimplifyResult::Simplified(Expr::Literal(
- ScalarValue::TimestampNanosecond(now_ts, self.timezone.clone()),
- None,
+ fn invoke_with_args(&self, _args: ScalarFunctionArgs) ->
Result<ColumnarValue> {
+ let now = chrono::Utc::now();
Review Comment:
I think the solution is a bit more involved than this; for one it makes
testing this quite difficult as we don't seem to have an easy way to control
this time. I think we need to be able to leverage properties during execution
(e.g. how we previously got the time via `execution_props()` in simplify)
instead of having the function call the raw time function by itself 🤔
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