sid-ihycq opened a new issue #14194:
URL: https://github.com/apache/shardingsphere/issues/14194
## Bug Report
I build my project just follow the case in official doc and found both of
those sql below will got NullPointerException
```
select max(id) from t_order
select count(1) frrm t_order
```
Exception in thread "main" java.lang.NullPointerException
at
org.apache.shardingsphere.sharding.merge.dql.groupby.GroupByMemoryMergedResult.getValueCaseSensitiveFromTables(GroupByMemoryMergedResult.java:134)
at
org.apache.shardingsphere.sharding.merge.dql.groupby.GroupByMemoryMergedResult.getValueCaseSensitive(GroupByMemoryMergedResult.java:124)
at
org.apache.shardingsphere.sharding.merge.dql.groupby.GroupByMemoryMergedResult.init(GroupByMemoryMergedResult.java:73)
at
org.apache.shardingsphere.sharding.merge.dql.groupby.GroupByMemoryMergedResult.init(GroupByMemoryMergedResult.java:53)
at
org.apache.shardingsphere.infra.merge.result.impl.memory.MemoryMergedResult.<init>(MemoryMergedResult.java:51)
at
org.apache.shardingsphere.sharding.merge.dql.groupby.GroupByMemoryMergedResult.<init>(GroupByMemoryMergedResult.java:56)
at
org.apache.shardingsphere.sharding.merge.dql.ShardingDQLResultMerger.getGroupByMergedResult(ShardingDQLResultMerger.java:108)
at
org.apache.shardingsphere.sharding.merge.dql.ShardingDQLResultMerger.build(ShardingDQLResultMerger.java:78)
at
org.apache.shardingsphere.sharding.merge.dql.ShardingDQLResultMerger.merge(ShardingDQLResultMerger.java:63)
at
org.apache.shardingsphere.infra.merge.MergeEngine.executeMerge(MergeEngine.java:90)
at
org.apache.shardingsphere.infra.merge.MergeEngine.merge(MergeEngine.java:80)
at
org.apache.shardingsphere.driver.jdbc.core.statement.ShardingSpherePreparedStatement.mergeQuery(ShardingSpherePreparedStatement.java:393)
at
org.apache.shardingsphere.driver.jdbc.core.statement.ShardingSpherePreparedStatement.executeQuery(ShardingSpherePreparedStatement.java:182)
at
org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:57)
at org.hibernate.loader.Loader.getResultSet(Loader.java:2322)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2075)
at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2037)
at org.hibernate.loader.Loader.doQuery(Loader.java:956)
at
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:357)
at org.hibernate.loader.Loader.doList(Loader.java:2868)
at org.hibernate.loader.Loader.doList(Loader.java:2850)
at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2682)
at org.hibernate.loader.Loader.list(Loader.java:2677)
at org.hibernate.loader.custom.CustomLoader.list(CustomLoader.java:338)
at
org.hibernate.internal.SessionImpl.listCustomQuery(SessionImpl.java:2181)
at
org.hibernate.internal.AbstractSharedSessionContract.list(AbstractSharedSessionContract.java:1204)
at
org.hibernate.query.internal.NativeQueryImpl.doList(NativeQueryImpl.java:177)
at
org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1617)
at
org.hibernate.query.internal.AbstractProducedQuery.uniqueResult(AbstractProducedQuery.java:1659)
### Which version of ShardingSphere did you use?
hibernate-core: 5.6.3.Final
shardingsphere-jdbc-core: 5.0.0
use in springboot with jpa go the same exception:
spring-boot-starter-parent: 2.5.6
shardingsphere-jdbc-core-spring-boot-starter: 5.0.0
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-JDBC
### Example codes for reproduce this issue (such as a github link).
just call JpaRepository.count().
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