Dandandan commented on a change in pull request #1068:
URL: https://github.com/apache/arrow-datafusion/pull/1068#discussion_r720864937
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File path: datafusion/src/sql/planner.rs
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@@ -170,8 +170,21 @@ impl<'a, S: ContextProvider> SqlToRel<'a, S> {
let right_plan = self.set_expr_to_plan(right.as_ref(),
None, ctes)?;
union_with_alias(left_plan, right_plan, alias)
}
+ (SetOperator::Union, false) => {
+ let left_plan = self.set_expr_to_plan(left.as_ref(), None,
ctes)?;
+ let right_plan = self.set_expr_to_plan(right.as_ref(),
None, ctes)?;
+ let union_plan = union_with_alias(left_plan, right_plan,
alias)?;
+ let projection_expr =
+ expand_wildcard(union_plan.schema(), &union_plan)?;
+ self.project(
+ LogicalPlanBuilder::from(union_plan)
+ .aggregate(projection_expr, vec![])?
+ .build()?,
+ vec![Expr::Wildcard],
+ )
+ }
_ => Err(DataFusionError::NotImplemented(format!(
- "Only UNION ALL is supported, found {}",
+ "Only UNION ALL and UNION are supported, found {}",
Review comment:
```suggestion
"Only UNION ALL and UNION [DISTINCT] are supported,
found {}",
```
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