Glowdable opened a new issue, #19535:
URL: https://github.com/apache/shardingsphere/issues/19535
## Bug Report
I got below error when I use a multi-level nested join, like this
```
select order_item_2019.* from order_item_2019
inner join
(select id from (select min(id) as id from order_item_2019 where user_id =
12345678 and order_status = 0) t1
union (select id from (select min(id) as id from order_item_2019 where
abc_user_id = 12345678 and order_status = 0) t2) tmp
on order_item_2019.id = tmp.id order by id asc limit 1
```
It should be noted that 'order_item_2019 is not a shard table, just single
table.
System error - Throwable org.mybatis.spring.MyBatisSystemException: nested
exception is org.apache.ibatis.executor.ExecutorException: Error preparing
statement. Cause: java.lang.NullPointerException
at
org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:92)
at
org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:440)
at com.sun.proxy.$Proxy377.selectOne(Unknown Source)
at
org.mybatis.spring.SqlSessionTemplate.selectOne(SqlSessionTemplate.java:159)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:87)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:93)
at com.sun.proxy.$Proxy434.selectOrderByUserId(Unknown Source)
at
org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
at
org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:750)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
at
org.springframework.cache.interceptor.CacheInterceptor.lambda$invoke$0(CacheInterceptor.java:53)
at
org.springframework.cache.interceptor.CacheAspectSupport.invokeOperation(CacheAspectSupport.java:365)
at
org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:420)
at
org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:345)
at
org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:61)
at
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at
org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: org.apache.ibatis.executor.ExecutorException: Error preparing
statement. Cause: java.lang.NullPointerException
at
org.apache.ibatis.executor.statement.BaseStatementHandler.prepare(BaseStatementHandler.java:97)
at
org.apache.ibatis.executor.statement.RoutingStatementHandler.prepare(RoutingStatementHandler.java:59)
at
org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:87)
at
org.apache.ibatis.executor.SimpleExecutor.doQuery(SimpleExecutor.java:62)
at
org.apache.ibatis.executor.BaseExecutor.queryFromDatabase(BaseExecutor.java:324)
at org.apache.ibatis.executor.BaseExecutor.query(BaseExecutor.java:156)
at
org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:109)
at
org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:83)
at
org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:147)
at
org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)
at
org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:76)
at jdk.internal.reflect.GeneratedMethodAccessor755.invoke(Unknown
Source)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at
org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:426)
Caused by: java.lang.NullPointerException
at
org.apache.shardingsphere.infra.binder.segment.select.subquery.engine.SubqueryTableContextEngine.createSubqueryTableContexts(SubqueryTableContextEngine.java:43)
at
org.apache.shardingsphere.infra.binder.segment.table.TablesContext.createSubqueryTables(TablesContext.java:99)
at
org.apache.shardingsphere.infra.binder.segment.table.TablesContext.<init>(TablesContext.java:86)
at
org.apache.shardingsphere.infra.binder.statement.dml.SelectStatementContext.<init>(SelectStatementContext.java:110)
at
org.apache.shardingsphere.infra.binder.statement.dml.SelectStatementContext.createSubqueryContexts(SelectStatementContext.java:124)
at
org.apache.shardingsphere.infra.binder.statement.dml.SelectStatementContext.<init>(SelectStatementContext.java:109)
at
org.apache.shardingsphere.infra.binder.SQLStatementContextFactory.getDMLStatementContext(SQLStatementContextFactory.java:146)
at
org.apache.shardingsphere.infra.binder.SQLStatementContextFactory.newInstance(SQLStatementContextFactory.java:129)
at
org.apache.shardingsphere.infra.binder.SQLStatementContextFactory.newInstance(SQLStatementContextFactory.java:114)
at
org.apache.shardingsphere.driver.jdbc.core.statement.ShardingSpherePreparedStatement.<init>(ShardingSpherePreparedStatement.java:181)
at
org.apache.shardingsphere.driver.jdbc.core.statement.ShardingSpherePreparedStatement.<init>(ShardingSpherePreparedStatement.java:149)
at
org.apache.shardingsphere.driver.jdbc.core.connection.ShardingSphereConnection.prepareStatement(ShardingSphereConnection.java:80)
at jdk.internal.reflect.GeneratedMethodAccessor745.invoke(Unknown
Source)
at
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at
org.apache.ibatis.logging.jdbc.ConnectionLogger.invoke(ConnectionLogger.java:55)
at com.sun.proxy.$Proxy236.prepareStatement(Unknown Source)
at
org.apache.ibatis.executor.statement.PreparedStatementHandler.instantiateStatement(PreparedStatementHandler.java:86)
at
org.apache.ibatis.executor.statement.BaseStatementHandler.prepare(BaseStatementHandler.java:88)
### Which version of ShardingSphere did you use?
5.1.1
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-JDBC
### Expected behavior
No NullPointerException
### Actual behavior
throw NullPointerException
### Reason analyze (If you can)
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
```
select order_item_2019.* from order_item_2019
inner join
(select id from (select min(id) as id from order_item_2019 where user_id =
12345678 and order_status = 0) t1
union (select id from (select min(id) as id from order_item_2019 where
abc_user_id = 12345678 and order_status = 0) t2) tmp
on order_item_2019.id = tmp.id order by id asc limit 1
```
Execute above sql with mybatis. You will get
NullPointerException.'order_item_2019' is not shard table, just single table.
### Example codes for reproduce this issue (such as a github link).
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