diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/joins.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/joins.scala
index edbeaf273fd6..117fa268964f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/joins.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/joins.scala
@@ -138,7 +138,7 @@ object EliminateOuterJoin extends Rule[LogicalPlan] with PredicateHelper {
 
     join.joinType match {
       case RightOuter if leftHasNonNullPredicate => Inner
-      case LeftOuter if rightHasNonNullPredicate => Inner
+      case LeftOuter if rightHasNonNullPredicate => LeftOuter
       case FullOuter if leftHasNonNullPredicate && rightHasNonNullPredicate => Inner
       case FullOuter if leftHasNonNullPredicate => LeftOuter
       case FullOuter if rightHasNonNullPredicate => RightOuter
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala
index 10df50479543..f5d48eda601f 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala
@@ -317,6 +317,8 @@ case class Join(
         left.constraints
       case LeftOuter =>
         left.constraints
+          .union(right.constraints)
+          .union(splitConjunctivePredicates(condition.get).toSet)
       case RightOuter =>
         right.constraints
       case FullOuter =>