comphead commented on code in PR #5748:
URL: https://github.com/apache/arrow-datafusion/pull/5748#discussion_r1150732166
##########
datafusion/expr/src/logical_plan/builder.rs:
##########
@@ -1041,20 +1041,44 @@ pub fn build_join_schema(
right: &DFSchema,
join_type: &JoinType,
) -> Result<DFSchema> {
+ let right_fields = right.fields();
+ let left_fields = left.fields();
+
let fields: Vec<DFField> = match join_type {
- JoinType::Inner | JoinType::Left | JoinType::Full | JoinType::Right =>
{
- let right_fields = right.fields().iter();
- let left_fields = left.fields().iter();
+ JoinType::Inner | JoinType::Full | JoinType::Right => {
// left then right
- left_fields.chain(right_fields).cloned().collect()
+ left_fields
+ .iter()
+ .chain(right_fields.iter())
+ .cloned()
+ .collect()
+ }
+ JoinType::Left => {
Review Comment:
I'll fix other types of joins on separate PR
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