fix cherry pick code

fe/fe-core/src/main/java/org/apache/doris/nereids/rules/RuleSet.java

@@ -48,6 +48,7 @@
 import org.apache.doris.nereids.rules.exploration.mv.MaterializedViewFilterProjectJoinRule;
 import org.apache.doris.nereids.rules.exploration.mv.MaterializedViewFilterProjectScanRule;
 import org.apache.doris.nereids.rules.exploration.mv.MaterializedViewFilterScanRule;
+import org.apache.doris.nereids.rules.exploration.mv.MaterializedViewOnlyJoinRule;
 import org.apache.doris.nereids.rules.exploration.mv.MaterializedViewProjectAggregateRule;
 import org.apache.doris.nereids.rules.exploration.mv.MaterializedViewProjectFilterAggregateRule;
 import org.apache.doris.nereids.rules.exploration.mv.MaterializedViewProjectFilterJoinRule;
@@ -245,6 +246,7 @@ public class RuleSet {
             .build();
 
     public static final List<Rule> MATERIALIZED_VIEW_RULES = planRuleFactories()
+            .add(MaterializedViewOnlyJoinRule.INSTANCE)
             .add(MaterializedViewProjectJoinRule.INSTANCE)
             .add(MaterializedViewFilterJoinRule.INSTANCE)
             .add(MaterializedViewFilterProjectJoinRule.INSTANCE)

fe/fe-core/src/main/java/org/apache/doris/nereids/rules/exploration/mv/MaterializedViewOnlyJoinRule.java

@@ -0,0 +1,45 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+package org.apache.doris.nereids.rules.exploration.mv;
+
+import org.apache.doris.nereids.rules.Rule;
+import org.apache.doris.nereids.rules.RuleType;
+import org.apache.doris.nereids.trees.plans.Plan;
+import org.apache.doris.nereids.trees.plans.logical.LogicalJoin;
+import org.apache.doris.nereids.trees.plans.logical.LogicalPlan;
+
+import com.google.common.collect.ImmutableList;
+
+import java.util.List;
+
+/**
+ * This is responsible for join  pattern such as only join
+ */
+public class MaterializedViewOnlyJoinRule extends AbstractMaterializedViewJoinRule {
+
+    public static final MaterializedViewOnlyJoinRule INSTANCE = new MaterializedViewOnlyJoinRule();
+
+    @Override
+    public List<Rule> buildRules() {
+        return ImmutableList.of(logicalJoin(any().when(LogicalPlan.class::isInstance),
+                any().when(LogicalPlan.class::isInstance)).thenApplyMultiNoThrow(ctx -> {
+                    LogicalJoin<Plan, Plan> root = ctx.root;
+                    return rewrite(root, ctx.cascadesContext);
+                }).toRule(RuleType.MATERIALIZED_VIEW_ONLY_JOIN));
+    }
+}