houqp commented on a change in pull request #1067:
URL: https://github.com/apache/arrow-datafusion/pull/1067#discussion_r721721686
##########
File path: datafusion/src/sql/planner.rs
##########
@@ -522,21 +521,43 @@ impl<'a, S: ContextProvider> SqlToRel<'a, S> {
name
))),
}?,
- columns_alias,
+ alias,
)
}
TableFactor::Derived {
subquery, alias, ..
- } => (
- self.query_to_plan_with_alias(
+ } => {
+ // if alias is None, return Err
+ if alias.is_none() {
+ return Err(DataFusionError::Plan(
+ "subquery in FROM must have an alias".parse().unwrap(),
+ ));
+ }
+ let logical_plan = self.query_to_plan_with_alias(
subquery,
alias.as_ref().map(|a| a.name.value.to_string()),
ctes,
- )?,
- alias.clone().map(|x| x.columns),
- ),
+ )?;
+ let schema = logical_plan.schema();
Review comment:
My guess is the projection won't work if the schema is still referencing
the original qualifier, i.e. projection asked for `b.id`, but the input plan
schema only has `customer.id`, resulting in runtime error.
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