heymind commented on a change in pull request #404:
URL: https://github.com/apache/arrow-datafusion/pull/404#discussion_r641913531
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File path: datafusion/src/physical_plan/mod.rs
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@@ -509,6 +514,76 @@ pub trait Accumulator: Send + Sync + Debug {
fn evaluate(&self) -> Result<ScalarValue>;
}
+/// Source represents where the data comes from.
+enum Source<R = Box<dyn Read + Send + Sync>> {
Review comment:
Ok. A new module named `source.rs` is more clear.
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