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https://issues.apache.org/jira/browse/ARROW-11323?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Grove updated ARROW-11323:
-------------------------------
Fix Version/s: 3.0.1
> [Rust][DataFusion] ComputeError("concat requires input of at least one
> array")) with queries with ORDER BY or GROUP BY that return no
> --------------------------------------------------------------------------------------------------------------------------------------
>
> Key: ARROW-11323
> URL: https://issues.apache.org/jira/browse/ARROW-11323
> Project: Apache Arrow
> Issue Type: Bug
> Components: Rust - DataFusion
> Reporter: Andrew Lamb
> Assignee: Andrew Lamb
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0, 3.0.1
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> If you run a SQL query in datafusion which has predicates that produces no
> rows that also includes a GROUP BY or ORDER BY clause, you get the following
> error:
> Error of "ArrowError(ComputeError("concat requires input of at least one
> array"))"
> Here are two test cases that show the problem:
> https://github.com/apache/arrow/blob/master/rust/datafusion/src/execution/context.rs#L889
> {code}
> #[tokio::test]
> async fn sort_empty() -> Result<()> {
> // The predicate on this query purposely generates no results
> let results =
> execute("SELECT c1, c2 FROM test WHERE c1 > 100000 ORDER BY c1
> DESC, c2 ASC", 4).await?;
> assert_eq!(results.len(), 0);
> Ok(())
> }
> #[tokio::test]
> async fn aggregate_empty() -> Result<()> {
> // The predicate on this query purposely generates no results
> let results = execute("SELECT SUM(c1), SUM(c2) FROM test where c1 >
> 100000", 4).await?;
> assert_eq!(results.len(), 0);
> Ok(())
> }
> {code}
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