houqp commented on a change in pull request #1068:
URL: https://github.com/apache/arrow-datafusion/pull/1068#discussion_r720900472
##########
File path: datafusion/src/execution/dataframe_impl.rs
##########
@@ -214,6 +215,20 @@ impl DataFrame for DataFrameImpl {
.build()?;
Ok(Arc::new(DataFrameImpl::new(self.ctx_state.clone(), &plan)))
}
+
+ fn distinct(&self) -> Result<Arc<dyn DataFrame>> {
Review comment:
perhaps it would be better to move this logic into the logical plan
builder module, then we can reuse the same code in dataframe_impl and sql
planner.
##########
File path: datafusion/tests/user_defined_plan.rs
##########
@@ -188,6 +190,44 @@ async fn run_and_compare_query_with_auto_schemas(
Ok(())
}
+// Run the query using the specified execution context and compare it
+// to the known result
+async fn run_and_compare_union_query(
+ mut ctx: ExecutionContext,
+ description: &str,
+) -> Result<()> {
+ let expected = vec![
+ "+-------------+---------+",
+ "| customer_id | revenue |",
+ "+-------------+---------+",
+ "| paul | 300 |",
+ "| jorge | 200 |",
+ "| andy | 150 |",
+ "+-------------+---------+",
+ ];
+
+ let s = exec_sql(&mut ctx, QUERY2).await?;
+ let actual = s.lines().collect::<Vec<_>>();
+
+ assert_eq!(
+ expected,
+ actual,
+ "output mismatch for {}. Expectedn\n{}Actual:\n{}",
+ description,
+ expected.join("\n"),
+ s
+ );
+ Ok(())
+}
+
+#[tokio::test]
+
Review comment:
nitpick, to keep the style consistent, we typically don't leave a
newline between `#[tokio::test]` and the test implementation.
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