restore StatementContext.rewrittenCteProducer in CostBasedRewriteJob

Author: englefly

fe/fe-core/src/main/java/org/apache/doris/nereids/jobs/rewrite/CostBasedRewriteJob.java

@@ -19,6 +19,7 @@
 
 import org.apache.doris.common.Pair;
 import org.apache.doris.nereids.CascadesContext;
+import org.apache.doris.nereids.StatementContext;
 import org.apache.doris.nereids.cost.Cost;
 import org.apache.doris.nereids.hint.Hint;
 import org.apache.doris.nereids.hint.UseCboRuleHint;
@@ -28,17 +29,20 @@
 import org.apache.doris.nereids.memo.GroupExpression;
 import org.apache.doris.nereids.rules.Rule;
 import org.apache.doris.nereids.rules.RuleType;
+import org.apache.doris.nereids.trees.expressions.CTEId;
 import org.apache.doris.nereids.trees.plans.logical.LogicalCTEAnchor;
 import org.apache.doris.nereids.trees.plans.logical.LogicalPlan;
 import org.apache.doris.qe.ConnectContext;
 
 import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Maps;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
 
 /**
@@ -56,6 +60,11 @@ public CostBasedRewriteJob(List<RewriteJob> rewriteJobs) {
         // need to generate real rewrite job list
     }
 
+    private void restoreCteProducerMap(StatementContext context, Map<CTEId, LogicalPlan> currentCteProducers) {
+        context.getRewrittenCteProducer().clear();
+        currentCteProducers.forEach(context.getRewrittenCteProducer()::put);
+    }
+
     @Override
     public void execute(JobContext jobContext) {
         // checkHint.first means whether it use hint and checkHint.second means what kind of hint it used
@@ -74,9 +83,15 @@ public void execute(JobContext jobContext) {
             return;
         }
 
+        Map<CTEId, LogicalPlan> currentCteProducers = Maps.newHashMap();
+        // cost based rewrite job may contaminate StatementContext.rewrittenCteProducer
+        // clone current rewrittenCteProducer, and restore it after getCost(.).
+        currentCtx.getStatementContext().getRewrittenCteProducer().forEach(currentCteProducers::put);
         // compare two candidates
         Optional<Pair<Cost, GroupExpression>> skipCboRuleCost = getCost(currentCtx, skipCboRuleCtx, jobContext);
+        restoreCteProducerMap(currentCtx.getStatementContext(), currentCteProducers);
         Optional<Pair<Cost, GroupExpression>> appliedCboRuleCost = getCost(currentCtx, applyCboRuleCtx, jobContext);
+        restoreCteProducerMap(currentCtx.getStatementContext(), currentCteProducers);
         // If one of them optimize failed, just return
         if (!skipCboRuleCost.isPresent() || !appliedCboRuleCost.isPresent()) {
             LOG.warn("Cbo rewrite execute failed on sql: {}, jobs are {}, plan is {}.",

regression-test/suites/nereids_p0/cte/costbasedrewrite_producer/costbasedrewrite_producer.groovy

@@ -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.
+suite("costbasedrewrite_producer") {
+    sql """
+    drop table if exists t1;
+
+    create table t1(a1 int,b1 int)
+    properties("replication_num" = "1");
+
+    insert into t1 values(1,2);
+
+    drop table if exists t2;
+
+    create table t2(a2 int,b2 int)
+    properties("replication_num" = "1");
+
+    insert into t2 values(1,3);
+    """
+
+    sql"""
+   with cte1 as (
+    select t1.a1, t1.b1
+    from t1
+    where t1.a1 > 0 and not exists (select distinct t2.b2 from t2 where t1.a1 = t2.a2 or t1.b1 = t2.a2)  
+    ),
+    cte2 as (
+    select * from cte1 union  select * from cte1)
+   select * from cte2 join t1 on cte2.a1 = t1.a1;
+
+    """
+}