Dandandan commented on a change in pull request #9359:
URL: https://github.com/apache/arrow/pull/9359#discussion_r566951425
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File path: rust/datafusion/src/logical_plan/expr.rs
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@@ -169,6 +170,13 @@ pub enum Expr {
},
/// Represents a reference to all fields in a schema.
Wildcard,
+ /// Extract date parts (day, hour, minute) from a date / time expression
+ Extract {
Review comment:
Alternatively, this could use `ScalarFunction` e.g. using "date_part"
(which is also supported by PostgreSQL) to avoid an extra enum option, and
convert the extract sql syntax to this `ScalarFunction`. I am not sure which is
better?
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