metesynnada commented on code in PR #8234:
URL: https://github.com/apache/arrow-datafusion/pull/8234#discussion_r1398772975
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datafusion/physical-plan/src/joins/stream_join_utils.rs:
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@@ -740,20 +617,338 @@ pub fn record_visited_indices<T: ArrowPrimitiveType>(
}
}
+#[macro_export]
+macro_rules! handle_state {
+ ($match_case:expr) => {
+ match $match_case {
+ Ok(StreamJoinStateResult::Continue) => continue,
+ Ok(StreamJoinStateResult::Ready(res)) =>
Poll::Ready(Ok(res).transpose()),
+ Err(e) => Poll::Ready(Some(Err(e))),
+ }
+ };
+}
+
+#[macro_export]
+macro_rules! handle_async_state {
+ ($state_func:expr, $cx:expr) => {
+ $crate::handle_state!(ready!($state_func.poll_unpin($cx)))
+ };
+}
+
+/// Represents the possible results of a state in the join stream.
+pub enum StreamJoinStateResult<T> {
Review Comment:
It is used for simplifying the Poll results handling, nothing more. The API
handles Poll::Ready and Poll::Pending conditions.
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