diff --git a/core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableJoin.java b/core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableJoin.java
index cfd00a418c65..aba5fe06e040 100644
--- a/core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableJoin.java
+++ b/core/src/main/java/org/apache/calcite/adapter/enumerable/EnumerableJoin.java
@@ -202,10 +202,10 @@ public Result implement(EnumerableRelImplementor implementor, Prefer pref) {
         physType,
         builder.append(
             Expressions.call(
-                leftExpression,
+                rightExpression,
                 BuiltInMethod.JOIN.method,
                 Expressions.list(
-                    rightExpression,
+                    leftExpression,
                     leftResult.physType.generateAccessor(leftKeys),
                     rightResult.physType.generateAccessor(rightKeys),
                     EnumUtils.joinSelector(joinType,