alamb commented on code in PR #5555:
URL: https://github.com/apache/arrow-datafusion/pull/5555#discussion_r1134319188
##########
datafusion/physical-expr/src/datetime_expressions.rs:
##########
@@ -537,6 +539,40 @@ where
to_ticks(array, 1_000_000_000)
}
+fn epoch<T>(array: &PrimitiveArray<T>) -> Result<Float64Array>
+where
+ T: ArrowTemporalType + ArrowNumericType,
+ i64: From<T::Native>,
+{
+ let mut b = Float64Builder::with_capacity(array.len());
+ match array.data_type() {
+ DataType::Timestamp(tu, _) => {
+ for i in 0..array.len() {
+ if array.is_null(i) {
+ b.append_null();
+ } else {
+ let scale = match tu {
Review Comment:
I double checked that this is consistent with postgres docs:
https://www.postgresql.org/docs/8.1/functions-datetime.html. 👍
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