how to retrieve an aggregation function query with spring-data-jpa

Question

I am using Spring data jpa 1.2 and I can't find anyway to retrieve an aggregate query result like the following one.

select count(v), date(v.createTimestamp) from UserEntity v
    group by date(v.createTimestamp)

Which work perfectly with the native JPA

@Entity()
public class UserEntity {

   @Id
   private long id;
   .
   .
   @Column(columnDefinition = "TIMESTAMP DEFAULT CURRENT_TIMESTAMP")
   private Timestamp createTimestamp;

}

any my JPA repository is

public interface UserRepository extends JpaRepository<UserEntity, Long>, 
      JpaSpecificationExecutor<UserEntity> {
}

so how can I do an aggregate queries throw Spring data, I find absolutely nothing in the documentation

score 8 · Accepted Answer · answered Apr 16 '14 at 11:26

I found a way to do this

public interface UserRepository extends JpaRepository<UserEntity, Long>, 
      JpaSpecificationExecutor<UserEntity> {

      @Query(value = "select count(v), date(v.createTimestamp) from UserEntity v group by date(v.createTimestamp)", 
             countQuery = "select count(1) from (select count(1) from UserEntity v group by date(v.createTimestamp)) z")
      public List<Object[]> findCountPerDay();
}

This way we can get aggregate data along with actual count ( aggregated records )

score 5 · Answer 2 · edited May 23 '17 at 12:34

5

"countBy" is currently not supported in Spring Data:

Support to 'countBy' query methods

Does Spring Data JPA have any way to count entites using method name resolving?

edited May 23 '17 at 12:34

Community

1
1

answered Mar 15 '13 at 10:30

ezgi

376
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3

1

The second you list actually has been updated to reflect that as of spring data 1.7, the countby predicate has been added – chrismarx Jul 21 '15 at 15:47

score 1 · Answer 3 · edited Oct 27 '15 at 15:43

1

you can also use @NativeQuery option

edited Oct 27 '15 at 15:43

Bob

5,510
9
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80

answered Oct 27 '15 at 04:23

Charles Raimond

11
2

score 0 · Answer 4 · answered Mar 18 '13 at 08:04

0

You can have @Query for custom queries for your unsupporeted methods in spring-data.

answered Mar 18 '13 at 08:04

manocha_ak

904
7
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how to retrieve an aggregation function query with spring-data-jpa

4 Answers4