strongduanmu opened a new issue, #21420:
URL: https://github.com/apache/shardingsphere/issues/21420

   ## Bug Report
   
   ### Which version of ShardingSphere did you use?
   
   
https://github.com/apache/shardingsphere/commit/40b5076d63d21c0bb19cca16d4db211648b3c7f5
   
   ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
   
   ShardingSphere-Proxy
   
   ### Expected behavior
   
   Execute `SELECT * FROM t_order INTERSECT SELECT * FROM t_order;` 
successfully.
   
   ### Actual behavior
   
   ```
   org.apache.calcite.plan.RelOptPlanner$CannotPlanException: There are not 
enough rules to produce a node with desired properties: convention=ENUMERABLE, 
sort=[].
   Missing conversion is LogicalIntersect[convention: NONE -> ENUMERABLE]
   There is 1 empty subset: rel#2594:RelSubset#1.ENUMERABLE.[], the relevant 
part of the original plan is as follows
   2592:LogicalIntersect(all=[false])
     2575:LogicalTableScan(subset=[rel#2591:RelSubset#0.NONE.[]], 
table=[[public, t_order]])
     2575:LogicalTableScan(subset=[rel#2591:RelSubset#0.NONE.[]], 
table=[[public, t_order]])
   
   Root: rel#2594:RelSubset#1.ENUMERABLE.[]
   Original rel:
   LogicalIntersect(subset=[rel#2594:RelSubset#1.ENUMERABLE.[]], all=[false]): 
rowcount = 100.0, cumulative cost = {100.0 rows, 100.0 cpu, 0.0 io}, id = 2592
     LogicalTableScan(subset=[rel#2591:RelSubset#0.NONE.[]], table=[[public, 
t_order]]): rowcount = 100.0, cumulative cost = {100.0 rows, 101.0 cpu, 0.0 
io}, id = 2575
     LogicalTableScan(subset=[rel#2591:RelSubset#0.NONE.[]], table=[[public, 
t_order]]): rowcount = 100.0, cumulative cost = {100.0 rows, 101.0 cpu, 0.0 
io}, id = 2575
   
   Sets:
   Set#0, type: RecordType(JavaType(class java.lang.Integer) order_id, 
JavaType(class java.lang.Integer) user_id, JavaType(class java.lang.String) 
status, JavaType(class java.lang.Integer) merchant_id, JavaType(class 
java.lang.String) remark, JavaType(class java.sql.Date) creation_date)
        rel#2591:RelSubset#0.NONE.[], best=null
                rel#2575:LogicalTableScan.NONE.[](table=[public, t_order]), 
rowcount=100.0, cumulative cost={inf}
        rel#2597:RelSubset#0.ENUMERABLE.[], best=rel#2596
                rel#2596:EnumerableTableScan.ENUMERABLE.[](table=[public, 
t_order]), rowcount=100.0, cumulative cost={100.0 rows, 101.0 cpu, 0.0 io}
   Set#1, type: RecordType(JavaType(class java.lang.Integer) order_id, 
JavaType(class java.lang.Integer) user_id, VARCHAR status, JavaType(class 
java.lang.Integer) merchant_id, VARCHAR remark, JavaType(class java.sql.Date) 
creation_date)
        rel#2593:RelSubset#1.NONE.[], best=null
                
rel#2592:LogicalIntersect.NONE.[](input#0=RelSubset#2591,input#1=RelSubset#2591,all=false),
 rowcount=100.0, cumulative cost={inf}
        rel#2594:RelSubset#1.ENUMERABLE.[], best=null
                
rel#2595:AbstractConverter.ENUMERABLE.[](input=RelSubset#2593,convention=ENUMERABLE,sort=[]),
 rowcount=100.0, cumulative cost={inf}
   
   Graphviz:
   digraph G {
        root [style=filled,label="Root"];
        subgraph cluster0{
                label="Set 0 RecordType(JavaType(class java.lang.Integer) 
order_id, JavaType(class java.lang.Integer) user_id, JavaType(class 
java.lang.String) status, JavaType(class java.lang.Integer) merchant_id, 
JavaType(class java.lang.String) remark, JavaType(class java.sql.Date) 
creation_date)";
                rel2575 [label="rel#2575:LogicalTableScan\ntable=[public, 
t_order]\nrows=100.0, cost={inf}",shape=box]
                rel2596 [label="rel#2596:EnumerableTableScan\ntable=[public, 
t_order]\nrows=100.0, cost={100.0 rows, 101.0 cpu, 0.0 
io}",color=blue,shape=box]
                subset2591 [label="rel#2591:RelSubset#0.NONE.[]"]
                subset2597 [label="rel#2597:RelSubset#0.ENUMERABLE.[]"]
        }
        subgraph cluster1{
                label="Set 1 RecordType(JavaType(class java.lang.Integer) 
order_id, JavaType(class java.lang.Integer) user_id, VARCHAR status, 
JavaType(class java.lang.Integer) merchant_id, VARCHAR remark, JavaType(class 
java.sql.Date) creation_date)";
                rel2592 
[label="rel#2592:LogicalIntersect\ninput#0=RelSubset#2591,input#1=RelSubset#2591,all=false\nrows=100.0,
 cost={inf}",shape=box]
                rel2595 
[label="rel#2595:AbstractConverter\ninput=RelSubset#2593,convention=ENUMERABLE,sort=[]\nrows=100.0,
 cost={inf}",shape=box]
                subset2593 [label="rel#2593:RelSubset#1.NONE.[]"]
                subset2594 
[label="rel#2594:RelSubset#1.ENUMERABLE.[]",color=red]
        }
        root -> subset2594;
        subset2591 -> rel2575;
        subset2597 -> rel2596[color=blue];
        subset2593 -> rel2592; rel2592 -> subset2591[label="0"]; rel2592 -> 
subset2591[label="1"];
        subset2594 -> rel2595; rel2595 -> subset2593;
   }
        at 
org.apache.calcite.plan.volcano.RelSubset$CheapestPlanReplacer.visit(RelSubset.java:709)
        at 
org.apache.calcite.plan.volcano.RelSubset.buildCheapestPlan(RelSubset.java:390)
        at 
org.apache.calcite.plan.volcano.VolcanoPlanner.findBestExp(VolcanoPlanner.java:533)
        at 
org.apache.shardingsphere.sqlfederation.optimizer.SQLOptimizeEngine.optimizeWithCBO(SQLOptimizeEngine.java:69)
        at 
org.apache.shardingsphere.sqlfederation.optimizer.SQLOptimizeEngine.optimize(SQLOptimizeEngine.java:53)
        at 
org.apache.shardingsphere.sqlfederation.advanced.AdvancedSQLFederationExecutor.execute(AdvancedSQLFederationExecutor.java:141)
        at 
org.apache.shardingsphere.sqlfederation.advanced.AdvancedSQLFederationExecutor.executeQuery(AdvancedSQLFederationExecutor.java:110)
        at 
org.apache.shardingsphere.proxy.backend.communication.jdbc.JDBCDatabaseCommunicationEngine.doExecuteFederation(JDBCDatabaseCommunicationEngine.java:163)
        at 
org.apache.shardingsphere.proxy.backend.communication.jdbc.JDBCDatabaseCommunicationEngine.execute(JDBCDatabaseCommunicationEngine.java:121)
        at 
org.apache.shardingsphere.proxy.frontend.opengauss.command.query.simple.OpenGaussComQueryExecutor.execute(OpenGaussComQueryExecutor.java:76)
        at 
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.executeCommand(CommandExecutorTask.java:111)
        at 
org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.run(CommandExecutorTask.java:78)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
   ```
   
   ### Reason analyze (If you can)
   
   ### Steps to reproduce the behavior, such as: SQL to execute, sharding rule 
configuration, when exception occur etc.
   
   ### Example codes for reproduce this issue (such as a github link).
   


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