fangchenli commented on code in PR #23442:
URL: https://github.com/apache/datafusion/pull/23442#discussion_r3561463900
##########
datafusion/physical-plan/src/joins/cross_join.rs:
##########
@@ -102,23 +102,11 @@ pub struct CrossJoinExec {
impl CrossJoinExec {
/// Create a new [CrossJoinExec].
pub fn new(left: Arc<dyn ExecutionPlan>, right: Arc<dyn ExecutionPlan>) ->
Self {
- // left then right
- let (all_columns, metadata) = {
- let left_schema = left.schema();
- let right_schema = right.schema();
- let left_fields = left_schema.fields().iter();
- let right_fields = right_schema.fields().iter();
-
- let mut metadata = left_schema.metadata().clone();
- metadata.extend(right_schema.metadata().clone());
-
- (
- left_fields.chain(right_fields).cloned().collect::<Fields>(),
- metadata,
- )
- };
-
- let schema =
Arc::new(Schema::new(all_columns).with_metadata(metadata));
+ // Use the shared helper (inner join) so metadata merges the same way
as
+ // the logical plan; merging it here independently let schemas diverge.
+ let (schema, _) =
+ build_join_schema(&left.schema(), &right.schema(),
&JoinType::Inner);
Review Comment:
A separate issue was opened for the pre-existing swap mismatch #23461
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