@Query(""" SELECT *, 5 as extend_value FROM entity_table """) fun getExtendedEntities(): List<ExtendEntity> data class ExtendEntity( @Embedded.Nullable val entity: Entity, val extendValue: Int, ) 

@Table("entity_table") data class Entity( @Embedded.Nullable val nestedEntity: NestedEntity, @Id val id: EntityId = EntityId.new(), val time: Instant, ) { @PersistenceCreator constructor( id: Ulid, time: Instant, nestedEntity: NestedEntity, ) : this( nestedEntity, EntityId(id), time ) } 

Cannot invoke "org.springframework.data.relational.core.mapping.AggregatePath$ColumnInfo.alias()" because the return value of "org.springframework.data.relational.core.mapping.AggregatePath$TableInfo.reverseColumnInfo()" is null java.lang.NullPointerException: Cannot invoke "org.springframework.data.relational.core.mapping.AggregatePath$ColumnInfo.alias()" because the return value of "org.springframework.data.relational.core.mapping.AggregatePath$TableInfo.reverseColumnInfo()" is null at org.springframework.data.jdbc.core.convert.MappingJdbcConverter$ResolvingRelationalPropertyValueProvider.hasValue(MappingJdbcConverter.java:424) at org.springframework.data.relational.core.conversion.MappingRelationalConverter.shouldReadEmbeddable(MappingRelationalConverter.java:586) at org.springframework.data.relational.core.conversion.MappingRelationalConverter.readEmbedded(MappingRelationalConverter.java:565) at org.springframework.data.relational.core.conversion.MappingRelationalConverter$2.getPropertyValue(MappingRelationalConverter.java:490) at org.springframework.data.relational.core.conversion.MappingRelationalConverter$2.getPropertyValue(MappingRelationalConverter.java:475) at org.springframework.data.mapping.model.PersistentEntityParameterValueProvider.getParameterValue(PersistentEntityParameterValueProvider.java:71) at org.springframework.data.relational.core.conversion.MappingRelationalConverter$ConvertingParameterValueProvider.getParameterValue(MappingRelationalConverter.java:1161) at org.springframework.data.mapping.model.SpELExpressionParameterValueProvider.getParameterValue(SpELExpressionParameterValueProvider.java:49) at org.springframework.data.mapping.model.ClassGeneratingEntityInstantiator.extractInvocationArguments(ClassGeneratingEntityInstantiator.java:301) at org.springframework.data.mapping.model.ClassGeneratingEntityInstantiator$EntityInstantiatorAdapter.createInstance(ClassGeneratingEntityInstantiator.java:273) at org.springframework.data.mapping.model.ClassGeneratingEntityInstantiator.createInstance(ClassGeneratingEntityInstantiator.java:98) at org.springframework.data.relational.core.conversion.MappingRelationalConverter.read(MappingRelationalConverter.java:454) at org.springframework.data.relational.core.conversion.MappingRelationalConverter.readAggregate(MappingRelationalConverter.java:348) at org.springframework.data.relational.core.conversion.MappingRelationalConverter.readAggregate(MappingRelationalConverter.java:311) at org.springframework.data.jdbc.core.convert.MappingJdbcConverter.readAndResolve(MappingJdbcConverter.java:287) at org.springframework.data.jdbc.core.convert.JdbcConverter.readAndResolve(JdbcConverter.java:106) at org.springframework.data.jdbc.core.convert.EntityRowMapper.mapRow(EntityRowMapper.java:82) at org.springframework.data.jdbc.repository.support.JdbcQueryLookupStrategy$PostProcessingRowMapper.mapRow(JdbcQueryLookupStrategy.java:335) at org.springframework.data.jdbc.repository.query.AbstractJdbcQuery$ConvertingRowMapper.mapRow(AbstractJdbcQuery.java:196) at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:94) at org.springframework.jdbc.core.RowMapperResultSetExtractor.extractData(RowMapperResultSetExtractor.java:61) at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:733) at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:658) at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:723) at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:748) at org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate.query(NamedParameterJdbcTemplate.java:178) at org.springframework.data.jdbc.repository.query.AbstractJdbcQuery.lambda$createSingleReadingQueryExecution$3(AbstractJdbcQuery.java:165) at org.springframework.data.jdbc.repository.query.StringBasedJdbcQuery.execute(StringBasedJdbcQuery.java:145) at org.springframework.data.repository.core.support.RepositoryMethodInvoker.doInvoke(RepositoryMethodInvoker.java:170) at org.springframework.data.repository.core.support.RepositoryMethodInvoker.invoke(RepositoryMethodInvoker.java:158) at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.doInvoke(QueryExecutorMethodInterceptor.java:164) at org.springframework.data.repository.core.support.QueryExecutorMethodInterceptor.invoke(QueryExecutorMethodInterceptor.java:143) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:123) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:385) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:137) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) at org.springframework.data.repository.core.support.MethodInvocationValidator.invoke(MethodInvocationValidator.java:95) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:249) at jdk.proxy3/jdk.proxy3.$Proxy116.getExtendedEntities(Unknown Source) at com.example.demo.entity.RepoTests.selectExtended(RepoTests.kt:15)