maryannxue commented on a change in pull request #23036: [SPARK-26065][SQL]
Change query hint from a `LogicalPlan` to a field
URL: https://github.com/apache/spark/pull/23036#discussion_r245465941
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/planning/patterns.scala
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@@ -164,25 +167,35 @@ object ExtractFiltersAndInnerJoins extends
PredicateHelper {
* was involved in an explicit cross join. Also returns the entire list of
join conditions for
* the left-deep tree.
*/
- def flattenJoin(plan: LogicalPlan, parentJoinType: InnerLike = Inner)
+ def flattenJoin(
Review comment:
The tests are in JoinHintsSuite: "hint preserved after join reorder".
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