msathis commented on a change in pull request #288:
URL: https://github.com/apache/arrow-datafusion/pull/288#discussion_r630073584
##########
File path: datafusion/src/optimizer/constant_folding.rs
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@@ -200,6 +209,15 @@ impl<'a> ExprRewriter for ConstantRewriter<'a> {
Expr::Not(inner)
}
}
+ Expr::ScalarFunction {
+ fun: BuiltinScalarFunction::Now,
+ ..
+ } => Expr::Literal(ScalarValue::TimestampNanosecond(Some(
+ self.execution_props
+ .query_execution_start_time
+ .unwrap()
Review comment:
I can make it `DateTime<Utc>` instead of `Option<DateTime<Utc>>`
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