I have an custom query for delete records from 2 tables as follows
#Repository
public interface RoamingStatusHistoryRepository extends JpaRepository<RoamingStatusHistory, String> {
#Query("DELETE rsh,rs from RoamingStatusHistory rsh inner join RoamingStatus rs on rsh.msisdn = rs.msisdn where TIMEDIFF(NOW(),rsh.createdDate)>'00:00:30'")
public List<Date> deleteByDate();
}
But after DELETE IntelliJ saying from expected got rsh and after rsh there is a error saying alias definition or WHERE expected, got ','
How to fix this issue. Have researched in the internet but couldn't find a solution
I assume that this query is a native SQL query so you have to add nativeQuery = true
#Repository
public interface RoamingStatusHistoryRepository extends JpaRepository<RoamingStatusHistory, String> {
#Query("DELETE rsh,rs from RoamingStatusHistory rsh inner join RoamingStatus rs on rsh.msisdn = rs.msisdn where TIMEDIFF(NOW(),rsh.createdDate)>'00:00:30'",
nativeQuery = true)
public List<Date> deleteByDate();
}
Related
I`m using Repository like this:
public interface UserRepository extends Repository<User, Long> {
List<User> findByEmailAddressAndLastname(String emailAddress, String lastname);
}
But what I need is execute my own sql statement.
select u.* from users u where exists ( select 1 from expires_users where users_id = u.id )
Please, past link references in answers.
I think you can do as pointed in the documentation of Spring Data JPA.
Here is an example:
public interface UserRepository extends JpaRepository<User, Long> {
#Query("select u.* from User u
where exists(select 1 from ExpiredUser e where e.id = u.id)")
Page<User> findExpiredUsers(Pageable pageable);
}
The Page and Pageable parts are for paging results, assuming that this query could return many more results than you would like to process at once. More information on paging results can be found here.
I have a question. when I use spring data jpa, I want to it return Map Collections, but it wrong. Then I search on the internet found a solution. Flowing.
#Transactional(readOnly = true)
public interface GoodsRepository extends JpaRepository<TbGoodsEntity, Integer> {
#Query(value = "select new map(t.id as id, t.goodsName as goodsName) from TbGoodsEntity t group by t.goodsName")
public List<Map<String, Object>> getGoodsNames();// it`s ok,
#Query(value = "select * from tb_goods t group by t.goodsName", nativeQuery = true)
public List<Map<String, Object>> getGoods();//it`s error
}
But I don't think to use new map method its best solution, I`d like to ask if there any other solutions. Thanks.
If use use "native" query then each row will be returned as "List" since spring doesn't have row transformer. So your output becomes List<List<Object>>.
If you try the below query then you should get List<Map<String,Object>>
#Query(value = "select t from tb_goods t group by t.goodsName")
public List<Map<String, Object>> getGoods();
Note: I am guessing your DB column name is "goodsName" so not commenting if query is correct or not.
I'm using java 8 and spring-data-rest to create API on my data.
I have a table Car(id, name, date...)
I'm trying to have an endpoint to retrieve distinct car names.
here's my Repository :
#RepositoryRestResource(path = "cars")
public interface CarRepository extends JpaRepository<Car, Long> {
//What i want to do
//#Query(value = "select distinct c.name as name from Car c")
#Query(value = "select distinct c from Car c")
List<Car> findDistinctName();
}
The query commented does not work , i have an exception
java.lang.IllegalArgumentException: PersistentEntity must not be null!
apparently this is the normal behavior of SDR.
I tried another solution by using Projections
#Projection(name = "name", types = {Car.class})
public interface CarName {
String getName();
}
but i cant get the distinct values, any idea?
Thank you :)
All you need, to do if you need a distinct list of cars, is such this query method:
public interface CarRepository extends JpaRepository<Car, Long> {
List<Car> findDistinctBy();
}
Spring Data JPA supports the Distinct keyword in repository query methods to set a distinct flag on the query to be created.
I found an (ugly) workaround, using jpql :
#Query(value = "select c from Car C WHERE c.id IN (SELECT min(ca.id) FROM Car ca Group by ca.name)")
I think you should remove the #Query annotation.
Just
List<Car> findDistinctName(); or List<Car> findNameDistinct(); should suffice.
It will automatically generate the query select c.name from Car c
My question is about the way Spring data is generating the query .
I have two entities : Message , Sender
#Entity
public class Message extends BaseEntity {
#ManyToOne
protected Account sender;
}
I have a call to
messageDao.findBySenderId(Long id)
The result is query all columns from the two two table with a left outer join between the two tables , but my expectation was simply to just select from message table where sender_id = the passed value.
So is there a way to force selecting only the first message entity and not to join with the other one? I want simple condition in the where clause
by using findBy not custom #Query
You will need a repository like (untested) :
#Repository
public interface MessageRepository extends JpaRepository<Message, Long> {
Message findFirstBySenderId(Long id);
}
See repositories.query-methods
I think Hibernate is doing a LEFT JOIN because your #ManyToOne is optional = true (default).
Try:
#ManyTone(optional = false)
And you will see Hibernate doing a query without a JOIN, as you expected.
You can use fetch type LAZY for the associations types:
#ManyToOne(optional = false, fetch = FetchType.LAZY)
I am using Spring JPA for database access. I am able to find examples such as findByName and countByName, for which I dont have to write any method implementation. I am hoping to find examples for delete a group of records based on some condition.
Does Spring JPA support deleteByName-like delete? Any pointer is appreciated.
Regards and thanks.
Deprecated answer (Spring Data JPA <=1.6.x):
#Modifying annotation to the rescue. You will need to provide your custom SQL behaviour though.
public interface UserRepository extends JpaRepository<User, Long> {
#Modifying
#Query("delete from User u where u.firstName = ?1")
void deleteUsersByFirstName(String firstName);
}
Update:
In modern versions of Spring Data JPA (>=1.7.x) query derivation for delete, remove and count operations is accessible.
public interface UserRepository extends CrudRepository<User, Long> {
Long countByFirstName(String firstName);
Long deleteByFirstName(String firstName);
List<User> removeByFirstName(String firstName);
}
Derivation of delete queries using given method name is supported starting with version 1.6.0.RC1 of Spring Data JPA. The keywords remove and delete are supported. As return value one can choose between the number or a list of removed entities.
Long removeByLastname(String lastname);
List<User> deleteByLastname(String lastname);
2 ways:-
1st one Custom Query
#Modifying
#Query("delete from User where firstName = :firstName")
void deleteUsersByFirstName(#Param("firstName") String firstName);
2nd one JPA Query by method
List<User> deleteByLastname(String lastname);
When you go with query by method (2nd way) it will first do a get call
select * from user where last_name = :firstName
Then it will load it in a List
Then it will call delete id one by one
delete from user where id = 18
delete from user where id = 19
First fetch the list of object, then for loop to delete id one by one
But, the 1st option (custom query),
It's just a single query
It will delete wherever the value exists.
Since in 2nd option it is making multiple DB query, try to use the first option.
Go through this link too https://www.baeldung.com/spring-data-jpa-deleteby
If you take a look at the source code of Spring Data JPA, and particularly the PartTreeJpaQuery class, you will see that is tries to instantiate PartTree.
Inside that class the following regular expression
private static final Pattern PREFIX_TEMPLATE = Pattern.compile("^(find|read|get|count|query)(\\p{Lu}.*?)??By")
should indicate what is allowed and what's not.
Of course if you try to add such a method you will actually see that is does not work and you get the full stacktrace.
I should note that I was using looking at version 1.5.0.RELEASE of Spring Data JPA
If you will use pre defined delete methods as directly provided by spring JPA then below two queries will be execute by the framework.
First collect data(like id and other column) using by execute select query with delete query where clause.
then after getting resultSet of first query, second delete queries will be execute for all id(one by one)
Note : This is not optimized way for your application because many queries will be execute for single MYSQL delete query.
This is another optimized way for delete query code because only one delete query will execute by using below customized methods.
#NamedNativeQueries({
#NamedNativeQuery(name = "Abc.deleteByCreatedTimeBetween",
query = "DELETE FROM abc WHERE create_time BETWEEN ?1 AND ?2")
,
#NamedNativeQuery(name = "Abc.getByMaxId",
query = "SELECT max(id) from abc")
})
#Entity
public class Abc implements Serializable {
}
#Repository
public interface AbcRepository extends CrudRepository {
int getByMaxId();
#Transactional
#Modifying
void deleteByCreatedTimeBetween(String startDate, String endDate);
}
It works just
import org.springframework.transaction.annotation.Transactional;
#Transactional
Long removeAddressByCity(String city);
Yes , deleteBy method is supported
To use it you need to annotate method with #Transactional
here follows my 2 cents. You can also use native queries, like:
#Modifying
#Query(value="delete from rreo r where r.cod_ibge = ?1 and r.exercicio= ?2", nativeQuery = true)
void deleteByParameters(Integer codIbge, Integer exercicio);
#Query(value = "delete from addresses u where u.ADDRESS_ID LIKE %:addressId%", nativeQuery = true)
void deleteAddressByAddressId(#Param("addressId") String addressId);