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I am implementing a query which return output in custom object. With my implementation, I am getting an error:

"method public abstract java.util.List org.degs.repository.ConsolidateresponseRepository.transactions()!"

JPQL Repository code:

@Query(value = "SELECT new org.degs.beans.ConsolidateResDB(DATE_FORMAT(ts, '%d-%m-%Y') AS transdate,IFNULL(COUNT(orderreqid),0),IFNULL(COUNT(failamount),0),IFNULL(SUM(amount),0),IFNULL(SUM(successamount),0),IFNULL(SUM(failamount),0),IFNULL(COUNT(successcount),0)) FROM Consolidateresponse GROUP BY DATE_FORMAT(ts, '%d-%m-%Y') ORDER BY ts DESC")
public List<ConsolidateResDB> transactions();

ConsolidateResDB bean:

public class ConsolidateResDB {
    String transdate;
    long total;
    long failcount;
    double totalamount; double successamount;
    double failamount;
    long successcount;

I have already handled null values in the query itself and getting normal output if I run the same query in mysql db terminal, but while implementing in JPA and Spring Boot still receiving the NullPointerException error:

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'indexController': Unsatisfied dependency expressed through field 'crRepo'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'consolidateresponseRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List org.degs.repository.ConsolidateresponseRepository.transactions()!
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:588) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:366) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1264) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) ~[spring-context-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
at org.degs.SbipgMisApplication.main(SbipgMisApplication.java:16) [classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_121]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_121]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.5.2.RELEASE.jar:1.5.2.RELEASE]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'consolidateresponseRepository': Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List org.degs.repository.ConsolidateresponseRepository.transactions()!
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1628) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:208) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1138) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:585) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
... 24 common frames omitted
Caused by: java.lang.IllegalArgumentException: Validation failed for query for method public abstract java.util.List org.degs.repository.ConsolidateresponseRepository.transactions()!
at org.springframework.data.jpa.repository.query.SimpleJpaQuery.validateQuery(SimpleJpaQuery.java:92) ~[spring-data-jpa-1.11.1.RELEASE.jar:na]
at org.springframework.data.jpa.repository.query.SimpleJpaQuery.<init>(SimpleJpaQuery.java:62) ~[spring-data-jpa-1.11.1.RELEASE.jar:na]
at org.springframework.data.jpa.repository.query.JpaQueryFactory.fromMethodWithQueryString(JpaQueryFactory.java:72) ~[spring-data-jpa-1.11.1.RELEASE.jar:na]
at org.springframework.data.jpa.repository.query.JpaQueryFactory.fromQueryAnnotation(JpaQueryFactory.java:53) ~[spring-data-jpa-1.11.1.RELEASE.jar:na]
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$DeclaredQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:144) ~[spring-data-jpa-1.11.1.RELEASE.jar:na]
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$CreateIfNotFoundQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:212) ~[spring-data-jpa-1.11.1.RELEASE.jar:na]
at org.springframework.data.jpa.repository.query.JpaQueryLookupStrategy$AbstractQueryLookupStrategy.resolveQuery(JpaQueryLookupStrategy.java:77) ~[spring-data-jpa-1.11.1.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.<init>(RepositoryFactorySupport.java:436) ~[spring-data-commons-1.13.1.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactorySupport.getRepository(RepositoryFactorySupport.java:221) ~[spring-data-commons-1.13.1.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.initAndReturn(RepositoryFactoryBeanSupport.java:277) ~[spring-data-commons-1.13.1.RELEASE.jar:na]
at org.springframework.data.repository.core.support.RepositoryFactoryBeanSupport.afterPropertiesSet(RepositoryFactoryBeanSupport.java:263) ~[spring-data-commons-1.13.1.RELEASE.jar:na]
at org.springframework.data.jpa.repository.support.JpaRepositoryFactoryBean.afterPropertiesSet(JpaRepositoryFactoryBean.java:101) ~[spring-data-jpa-1.11.1.RELEASE.jar:na]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1687) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1624) ~[spring-beans-4.3.7.RELEASE.jar:4.3.7.RELEASE]
... 34 common frames omitted
Caused by: java.lang.NullPointerException: null
at org.hibernate.hql.internal.NameGenerator.generateColumnNames(NameGenerator.java:27) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.ast.util.SessionFactoryHelper.generateColumnNames(SessionFactoryHelper.java:418) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.ast.tree.SelectClause.initializeColumnNames(SelectClause.java:267) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.ast.tree.SelectClause.finishInitialization(SelectClause.java:257) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.ast.tree.SelectClause.initializeExplicitSelectClause(SelectClause.java:252) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.ast.HqlSqlWalker.useSelectClause(HqlSqlWalker.java:920) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.ast.HqlSqlWalker.processQuery(HqlSqlWalker.java:688) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:673) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:309) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:257) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:262) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:190) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:142) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:115) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:76) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:150) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:302) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:240) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1894) ~[hibernate-core-5.0.12.Final.jar:5.0.12.Final]
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:291) ~[hibernate-entitymanager-5.0.12.Final.jar:5.0.12.Final]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_121]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_121]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_121]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_121]
at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:347) ~[spring-orm-4.3.7.RELEASE.jar:4.3.7.RELEASE]
at com.sun.proxy.$Proxy85.createQuery(Unknown Source) ~[na:na]
at org.springframework.data.jpa.repository.query.SimpleJpaQuery.validateQuery(SimpleJpaQuery.java:86) ~[spring-data-jpa-1.11.1.RELEASE.jar:na]
... 47 common frames omitted

You have tell Spring to treat that query as native one. Otherwise it will try to validate it according to the JPA specification.

@Query(value = "SELECT ...", nativeQuery = true)
public List<Object[]> transactions();

Keep in mind that cannot use the NEW operator syntax in this case and you would have to deal with result as an array of Object.

Alternatively

If you want to use map the results directly to a POJO class you would have to (assuming that you are using JPA 2.1+):

1) Define the mapping:

@SqlResultSetMapping(
    name="transactionsMapping",
    classes={
        @ConstructorResult(
            targetClass=ConsolidateResDB.class,
            columns={
                @ColumnResult(name="transdate"),
                @ColumnResult(name="orderreqid")
                // further mappings ...

2) Define a native query

@NamedNativeQuery(name="transactions"
    , query="SELECT DATE_FORMAT(ts, '%d-%m-%Y') AS transdate, IFNULL(COUNT(orderreqid),0) ... ")

3) Define this method in the CrudRepository without the @Query annotation:

public List<ConsolidateResDB> transactions();

For Spring Data 2.0.5 and above,

After trying solution by Maciej my code started complaining "Got different size of tuples and aliases". To fix the issue in latest release we need to add

@Query(<Entity.FunctionName>, nativeQuery=true). 

This made my code work e2e.

For me it was (well not exactly the same code but you get the idea):

@Query("SELECT e FROM TheEntity e WHERE e.stuff = :stuff")
List<SomeEntity> findSomething(@Param("stuff") String someStr);

And don't forget the Entity:

@Entity(name = "TheEntity")

I faced same issue, below worked for me.

@Query(value = "select NEW org.degs.beans.ConsolidateResDB(DATE_FORMAT(c.ts, '%d-%m-%Y') ,IFNULL(COUNT(c.orderreqid),0),IFNULL(COUNT(c.failamount),0),IFNULL(SUM(c.amount),0),IFNULL(SUM(c.successamount),0),IFNULL(SUM(c.failamount),0),IFNULL(COUNT(c.successcount),0)) FROM Consolidateresponse c GROUP BY DATE_FORMAT(c.ts, '%d-%m-%Y') ORDER BY c.ts DESC") 
public List<ConsolidateResDB> transactions();

I got the same error and I din't want to use native query.

Solved it by removing the INNER JOIN clause.

  // Will not work if relations between entity classes are not defined properly.
  @Query(value = "SELECT d FROM Animal a "
      + "INNER JOIN Dog d ON a.id = d.animalId "
      + "WHERE d.name = ?1")

Here is the working one.

  // Works fine. (NO INNER JOIN)
  @Query(value = "SELECT d FROM Animal a, Dog d "
      + "WHERE a.id = d.animalId "
      + "WHERE d.name = ?1")

In my case, I wasn't trying to return output in a custom object. But I was getting this error as described in the question:

Caused by: java.lang.IllegalArgumentException: Validation failed for query 
Caused by: java.lang.NullPointerException: null

In my case, my code was like this:

public interface MyRepository extends CrudRepository<MyDAO, MyDAOPK> {
   @Query("select MyDAO from MyDAO")
   List<MyDAO> getAll();

What I had to do was remove the SELECT.

@Query("from MyDAO")
List<MyDAO> getAll();

Credit to this link for a clue.

Also I was able to use this solution elsewhere, to use a custom object to return results, as the original question asked about.

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