mingmwang commented on code in PR #5593:
URL: https://github.com/apache/arrow-datafusion/pull/5593#discussion_r1140363032
##########
datafusion/sql/src/expr/identifier.rs:
##########
@@ -102,11 +138,32 @@ impl<'a, S: ContextProvider> SqlToRel<'a, S> {
ScalarValue::Utf8(Some(name)),
)))
} else {
- // table.column identifier
- Ok(Expr::Column(Column {
- relation: Some(relation),
- name,
- }))
+ let outer_query_schema_opt =
+ planner_context.outer_query_schema.clone();
+ if let Some(outer) = outer_query_schema_opt.as_ref() {
+ match outer.field_with_qualified_name(&relation,
&name) {
+ Ok(field) => {
+ // found an exact match on a qualified
name in the outer plan schema, so this is an outer reference column
+ Ok(Expr::OuterReferenceColumn(
+ field.data_type().clone(),
+ Column {
+ relation: Some(relation),
+ name,
+ },
+ ))
+ }
+ Err(_) => Ok(Expr::Column(Column {
+ relation: Some(relation),
+ name,
+ })),
+ }
+ } else {
+ // table.column identifier
+ Ok(Expr::Column(Column {
+ relation: Some(relation),
+ name,
+ }))
+ }
Review Comment:
Sure, will do.
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