andygrove commented on code in PR #2354:
URL: https://github.com/apache/arrow-datafusion/pull/2354#discussion_r860191346
##########
datafusion/core/src/sql/planner.rs:
##########
@@ -1913,6 +1911,16 @@ impl<'a, S: ContextProvider> SqlToRel<'a, S> {
})
}
+ fn parse_scalar_subquery(
+ &self,
+ subquery: &Query,
+ input_schema: &DFSchema,
+ ) -> Result<Expr> {
+ Ok(Expr::ScalarSubquery(Subquery {
+ subquery: Arc::new(self.subquery_to_plan(subquery.clone(),
input_schema)?),
Review Comment:
I was thinking that an optimizer rule should perform this type of validation
check and this would cover both the SQL and DataFrame API (and maybe substrait
one day) use cases.
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