andygrove commented on a change in pull request #789:
URL: https://github.com/apache/arrow-datafusion/pull/789#discussion_r678396699
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File path: datafusion/src/dataframe.rs
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@@ -222,6 +223,21 @@ pub trait DataFrame: Send + Sync {
/// ```
async fn collect(&self) -> Result<Vec<RecordBatch>>;
+ /// Executes this DataFrame and returns a stream over a single partition
+ ///
+ /// ```
+ /// # use datafusion::prelude::*;
+ /// # use datafusion::error::Result;
+ /// # #[tokio::main]
+ /// # async fn main() -> Result<()> {
+ /// let mut ctx = ExecutionContext::new();
+ /// let df = ctx.read_csv("tests/example.csv", CsvReadOptions::new())?;
+ /// let stream = df.collect_stream().await?;
+ /// # Ok(())
+ /// # }
+ /// ```
+ async fn collect_stream(&self) -> Result<SendableRecordBatchStream>;
Review comment:
Good idea. I renamed these to `execute_stream` and
`execute_stream_partitioned`
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