Delete Operation on Embedded Object Spring JPA - spring

Question

I Have below Entities :
#Entity(name = "USRGRP_MAP")
public class UserGroupMapping {
#Id
#Column(name = "USRGRP_ID")
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "USER_GRP_MAP_SEQ")
#SequenceGenerator(sequenceName = "usrgrp_map_seq",allocationSize = 1,name = "USER_GRP_MAP_SEQ")
private Long mappingId;
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "USER_ID", referencedColumnName = "USER_ID")
private User user;
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "USR_GRP_ID", referencedColumnName = "USR_GRP_ID")
private UserGroup group;
#Column(name = "USR_USRGRP_ACT")
private String userGroupAct;
getter/setters
}
#Entity(name = "USER")
public class User {
#Id
#Column(name = "USER_ID")
private Long userId;
#Column(name = "LOGIN_ID")
private String userName;
getter/setters
}
#Entity(name = "USR_GRP")
public class UserGroup {
#Id
#Column(name = "USR_GRP_ID")
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "USER_GRP_SEQ")
#SequenceGenerator(sequenceName = "usr_grp_seq",allocationSize = 1,name = "USER_GRP_SEQ")
private long groupId;
#Column(name = "GRP_NM")
private String groupName;
#Column(name = "GRP_DESC")
private String groupDesc;
getter/setters
}
UserGroupMapping contains has many to one relationship with both user and group.
Now I want to do CRUD operation on UserGroupMapping for that I have created repository as below:
public interface UserGroupMappingRepository extends JpaRepository<UserGroupMapping, Long> {
List<UserGroupMapping> findByGroup(UserGroup group);
List<UserGroupMapping> findByUser(User user);
}
Now I want to write delete operation(for particular user and group) on UserGroupMapping without deleting any entry in USER and USR_GRP table , Just need to remove entry from USRGRP_MAP table.
I am trying to achieve it using native query:
#Query(value = "delete from USR_USRGRP_MAP where user_id = :userId and usr_grp_id = :groupId",nativeQuery = true)
void deleteUserGroupMappingByUserAndGroup(#Param("userId") Long userId, #Param("groupId") Long groupId);
Facing Exception Invalid SQL grammar, although query work fine in sql developer.
Below is my service class:
#Service
public class UserGroupMappingServiceImpl implements UserGroupMappingService{
#Autowired
private UserGroupMappingRepository repository;
#Override
public void deleteUserGroupMapping(Long userId, Long groupId) {
repository.deleteUserGroupMappingByUserAndGroup(userId,groupId);
}
}
Could anyone suggest correct way to delete entry from UserGroupMapping without deleting user and group ?
Below is USRGRP_MAP table:
USRGRP_ID USER_ID USR_USRGRP_ID USR_USRGRP_ACT
------------- ---------- ------------- -
41 306106 41 Y
14 108527 14 Y
8 295597 8 N
10 296518 10 Y
11 295597 11 Y
Thanks in advance .

Answer 1

Try to change
#Query(value = "delete from USR_USRGRP_MAP where user_id = :userId and usr_grp_id = :groupId",nativeQuery = true)
void deleteUserGroupMappingByUserAndGroup(#Param("userId") Long userId, #Param("groupId") Long groupId);
To this:
#Modifying
#Query(value = "delete from USR_USRGRP_MAP where user_id = :userId and usr_grp_id = :groupId",nativeQuery = true)
void deleteUserGroupMappingByUserAndGroup(#Param("userId") Long userId, #Param("groupId") Long groupId);
Cheers
~Emil