I have a table form_header with 3 records
There are more fields in the table decided not to add it here in the post since most are irrelevant. I created a class/entity to get the count with distinct for each status in sql.
#Entity()
#Table(name = "Form_Header")
#SqlResultSetMapping(name = "myMapping",
entities = {#EntityResult(
entityClass = FormSummary.class,
fields = {#FieldResult(name = "status", column = "status"),
#FieldResult(name = "id", column = "header_id")})})
public class FormSummary {
#Id()
private Long id;
private String status;
<getter and setter>
with entity manager
List<FormSummary> results = entityManager.createNativeQuery("select DISTINCT(status), COUNT(header_id) as header_id from Form_Header where is_deleted = 0 group by status order by status", "myMapping").getResultList();
for (FormSummary x : results) {
System.out.println("ABC " + x.getId());
System.out.println("ABC " + x.getStatus());
}
Issue is the sysout is showing this
instead of this
status header_id
APPROVE 1
DRAFT 1
SUBMITTED 1
Whats even weird is if I add an extra record in the table with the same status
I will get the correct data in my jpa
Am I missing something in my code or a possible bug with SqlResultSetMapping?
Related
I am new in MongoDB and trying to execute a very simple query to save collection to the database, but receive the error Bulk write operation error on server.
Entity:
#Document("role")
#Data
#NoArgsConstructor
#RequiredArgsConstructor
#EqualsAndHashCode(exclude = "id") <--------- compare only by unique field `name`
public class Role {
#Id
private String id;
#NotBlank
#NonNull
#Indexed(unique = true)
private ERole name;
}
ERole:
public enum ERole {ROLE_USER, ROLE_MODERATOR, ROLE_ADMIN}
logic:
Collection<Role> rolesFromDb = repository.findAll(); < --------- (1)
Collection<Role> rolesFromEnumSet = Arrays.stream(ERole.values()).map(Role::new).collect(Collectors.toSet());
if (!(rolesFromDb.containsAll(rolesFromEnumSet) &&
rolesFromEnumSet.containsAll(rolesFromDb))
) {
rolesFromEnumSet.removeAll(rolesFromDb); < ------------------ (2)
repository.saveAll(rolesFromEnumSet); < --------------------- (3)
}
I have a single record in the database and receive the next collection in rolesFromDatabase variable (line (1):
Role(id=63dc16b253565a43cee65848, name=ROLE_USER)
In line (2) a rolesFromEnuSet has an expected set:
0 = {Role#9387} "Role(id=null, name=ROLE_ADMIN)"
1 = {Role#9388} "Role(id=null, name=ROLE_MODERATOR)"
So, the database doesn't contain remembered records.
Why do I receive a "Duplicate error" in line (3)?
Your EqualsAndHashCode is comparing by ID, not name. This means that the rolesFromEnumSet.removeAll(rolesFromDb)) code is not removing anything in rolesFromEnumSet
This means that inside your transaction, you are actually left with 4 records:
Role(id=63dc16b253565a43cee65848, name=ROLE_USER)
Role(id=null, name=ROLE_USER)
Role(id=null, name=ROLE_MODERATOR)
Role(id=null, name=ROLE_ADMIN)
You'll receive a duplicate key error because it tries to save an additional role with the name ROLE_USER
I have 2 entities with OneToMany Relation as below,
public class Visit{
#OneToMany(mappedBy = "visit", fetch = FetchType.LAZY)
#OrderBy("updated_on DESC")
private List<StatusChange> statusHistory;
}
public class StatusChange{
#ManyToOne
#JoinColumn(name = "ms_visit_id")
private Visit visit;
#Column(name = "to_status")
#Enumerated(EnumType.STRING)
private VisitStatus toStatus;
}
Visits can have multiple status like created, canceled, deleted etc.. whenever the status change there will be a new row added to the StatusChange table with a entry associated to that visit (toStatus will become canceled) . Now I want a query to filter the visits for which the latest status is canceled and with the matching user id.
I am using the #query of JPA. I already have got the result with the following query.
#Query(value = "select vs1.visit from StatusChange vs1 where vs1.id in (" +
" select max(vs2.id) from StatusChange vs2 " +
" where vs2.visit.user.id = :userId" +
" group by vs2.visit.id)" +
" and vs1.toStatus in :status")
public List<MSVisit> findByUserAndStatus(#Param("userId") Long userId, #Param("status") List<Visit.VisitStatus> status);
But I feel the query can be improved or is there any way to query some thing like,
"from Visit visit" +
" where visit.statusHistory.get(0).toStatus in :status" +
" and visit.user.id = :userId
Thanks for your help.
Usually, these queries are best modeled with lateral joins, but Hibernate does not support that yet. Note that unless you meant something different, your query is not correct, as the max-aggregation is based on the value of the id rather than the updated_on value. Not sure if that is on purpose, but I would suggest the following query in case you really want the latest visit.
#Query(value = "from Visit vs1 where vs1.user.id = :userId and (select max(h.updatedOn) from vs1.statusHistory h) >= ALL (" +
" select max(h.updatedOn) from vs1.statusHistory h " +
" and vs1.toStatus in :status")
public List<MSVisit> findByUserAndStatus(#Param("userId") Long userId, #Param("status") List<Visit.VisitStatus> status);
Is there any way that I can generate ID field as 4 digit number i.e from 1000 to 9999 in my Spring boot application. Current Id field looks like this:
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE)
#Column(name = "EMP_ID", nullable = false)
public short getEmp_id() {
return emp_id;
}
As of now id is getting generated from 1. But I wanted to get it generated starting from 1000 and incremented by 1 until 9999.
As suggest by Ishikawa in comments and by referring Sequence Generation from Sequence Generation did below changes:
#Id
#GenericGenerator(
name = "empid-sequence-generator",
strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator",
parameters = {
#Parameter(name = "sequence_name", value = "user_sequence"),
#Parameter(name = "initial_value", value = "1000"),
#Parameter(name = "increment_size", value = "1")
}
)
#GeneratedValue(generator = "empid-sequence-generator")
#Column(name = "EMP_ID", nullable = false)
public short getEmp_id() {
return emp_id;
}
but even after that when trying to save the emp getting the below exception:
com.microsoft.sqlserver.jdbc.SQLServerException: Invalid object name 'user_sequence'.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:262)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResult(SQLServerStatement.java:1624)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement(SQLServerPreparedStatement.java:594)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PrepStmtExecCmd.doExecute(SQLServerPreparedStatement.java:524)
at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:7194)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:2979)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:248)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:223)
NOTE: It's third party database so I can't do any schema/constraint changes.I need to handle this through java code only.
My bad. Forgot to uncomment below line in application.properties.
spring.jpa.hibernate.ddl-auto = update
After uncommenting when I reboot my application it created the "user_sequence".
i just use userIdx of findAllregions's parameter to findFavoriteStore
this is my query
#Select("SELECT * FROM region")
#Results(value = {
#Result(property = "regionIdx", column = "regionIdx"),
#Result(property = "stores", javaType = Store.class, column = "storeIdx",
many = #Many(select = "com.travely.travely.mapper.StoreMapper.findFavoriteStore", fetchType = FetchType.LAZY))
})
List<Region> findAllRegions(#Param("userIdx") final Long useridx);
#Select("SELECT s.* FROM store as s NATURAL JOIN favorite as f WHERE f.userIdx=#{userIdx} AND f.isFavorite = 1")
List<Store> findFavoriteStore(#Param("userIdx") final long userIdx);
it works to select region of 'findAllRegions'
but doesn't work to select store of 'findFavoriteStore'
The query does not work because the column attribute is configured incorrectly.
Here is relevant part of the column attribute documentation:
The column name from the database, or the aliased column label that
holds the value that will be passed to the nested statement as an
input parameter.
As you see only the column from the main query result can be used.
It means that you either need to include the artificial column to the query and use it in the #Result.column like this:
#Select("SELECT #{userIdx} userIdx, r.* FROM region r")
#Results(value = {
#Result(property = "regionIdx", column = "regionIdx"),
#Result(
property = "stores", javaType = Store.class, column = "userIdx",
many = #Many(
select = "com.travely.travely.mapper.StoreMapper.findFavoriteStore",
fetchType = FetchType.LAZY))
})
List<Region> findAllRegions(#Param("userIdx") final Long useridx);
Alternatively if java 8+ is used you can use default interface methods to fetch associations/collections like this:
interfact MyMapper {
#Select("SELECT * FROM region")
#Results(value = {
#Result(property = "regionIdx", column = "regionIdx")
})
List<Region> findAllRegions();
default List<Region> findAllRegions(Long userIdx) {
List<Region> regions = findAllRegions();
List<Strore> favoriteStores = findFavoriteStore(userIdx);
for(Region region:regions) {
region.setStores(favoriteStores);
}
return regions;
}
#Select("SELECT s.* FROM store as s NATURAL JOIN favorite as f WHERE f.userIdx=#{userIdx} AND f.isFavorite = 1")
List<Store> findFavoriteStore(#Param("userIdx") final long userIdx);
}
Note that this does not use lazy fetching of the favourite stores. It seems that this is not needed as in the contexts that favorite stores are not needed the query without userIdx can (and should0 be used.
I have a case statement in my Native query where I am attempting to override a field in my entity.
SELECT i.id, i.ONE_TO_ONE_ID, i.ANOTHER, CASE(WHEN condition THEN 'YES' WHEN another_condition THEN 'NO' ELSE 'MAYBE' END) as word ....
I am using this with JpaRepository as a native query, with pagination.
When I run the native query against my db directly, the result set looks as though I expect.
| id_value | MAPPED_ENTITY_ID_value | another value | word_value (YES) |
When I run the native query from my JpaRepository, everything works there, except word is always null. I cant' seem to figure out how to map the additional String word result to a field in my Entity.
Is there a way to get this to map? Or will I have to create an entire #SqlResultSetMapping() for all of my fields coupled with a native query? (hoping not)
UPDATE: 1
I was generalizing above. Here is my Query.
#Query(
name = "listPagedMapping",
value = "SELECT DISTINCT i.ID, i.INSTANCE_ID, i.REGION, i.CNAME_STACK_ID, i.INSTANCE_STATE, i.IP_ADDRESS, i.EC2_ROLE_NAME, i.INSTANCE_OWNER, i.IS_MASTER, i.EC2_MASTER_ID, i.CNAME, i.EC2_START_TIMESTAMP, i.PRIVATE_DNS, i.INSTANCE_NAME, i.AUTO_TERMINATE, i.AUTO_TERMINATE_DATE, i.TERMINATION_ZONE, i.ADMIN_GROUP_AD_LDAP_ID, i.USER_GROUP_AD_LDAP_ID, (CASE WHEN i.INSTANCE_OWNER=:username THEN 'OWNER' WHEN i.ADMIN_GROUP_AD_LDAP_ID IN (g.AD_LDAP_ID) THEN 'ADMIN' WHEN i.USER_GROUP_AD_LDAP_ID IN (g.AD_LDAP_ID) THEN 'USER' END) as PERMISSION FROM USER u, USER_ACCESS_GROUPS g, EC2_PROVISIONING i WHERE i.INSTANCE_OWNER=:username and i.INSTANCE_STATE in (:instanceStates) or u.username=:username and i.INSTANCE_STATE in (:instanceStates) and g.USER_ID=u.USER_ID and (i.ADMIN_GROUP_AD_LDAP_ID IN (g.AD_LDAP_ID) or i.USER_GROUP_AD_LDAP_ID IN (g.AD_LDAP_ID))",
countQuery = "SELECT count(*) FROM (SELECT DISTINCT i.* FROM USER u, USER_ACCESS_GROUPS g, EC2_PROVISIONING i WHERE i.INSTANCE_OWNER=:username and i.INSTANCE_STATE in (:instanceStates) or u.username=:username and i.INSTANCE_STATE in (:instanceStates) and g.USER_ID=u.USER_ID and (i.ADMIN_GROUP_AD_LDAP_ID IN (g.AD_LDAP_ID) or i.USER_GROUP_AD_LDAP_ID IN (g.AD_LDAP_ID))) as ug",
nativeQuery = true)
Page<Ec2Instance> findAllByPermissionUserAdminOrOwnerAndInstanceStateIn(
#Param("username")final String username,
#Param("instanceStates") final Set<String> instanceStates,
final Pageable pageable);
}
Obviously a bit more complex.
I can get it to map to the entity field with using a named query, but then I loose all the default mappings:
#JsonInclude(JsonInclude.Include.NON_NULL)
#SuppressWarnings("unused")
#Data
#AllArgsConstructor
#NoArgsConstructor
#EqualsAndHashCode(exclude={"masterNode", "workers", "associatedBuckets"})
#Entity
#Table(name = "EC2_PROVISIONING")
#SqlResultSetMapping(
name="listPagedMapping",
columns = {
#ColumnResult(name = "permission", type = String.class)
}
)
#NamedNativeQuery(
name = "listAccessibleInstances",
query = ACCESSIBLE_QUERY,
resultSetMapping = "listPagedMapping"
)
public class Ec2Instance {
....
private String permission;
#column(name = "INSTANCE_ID")
private String instanceId;
#ManyToOne
#JoinColumn(name = "EC2_MASTER_ID")
private Ec2Instance masterNode;
#Setter(AccessLevel.NONE)
#ManyToMany(fetch = FetchType.EAGER)
#JoinTable(name = "WORKER_EC2_NODES", joinColumns = { #JoinColumn(name = "EC2_MASTER_ID") }, inverseJoinColumns = {
#JoinColumn(name = "ID") })
private Set<Ec2Instance> workers = new HashSet<>();
... More fields ..
}
I guess, I am hoping there is a way to provide a single mapping on-top of the default mapping that is done by ORM. The above code results in only a pageable of Content PERMISSION, rather than the whole entity + permission.
UPDATE: 2
Ok, so I am getting closer... Seems by removing the #ColumnResult I do get the default mapping, plus the PERMISSION field mapped over! Looks like this:
#SqlResultSetMapping(
name="listPagedMapping"
)
The last issue is it does not accept my CountQuery, and causes my tests to fail whenever a Pagination Query results with multiple pages. Looks like Spring try's to come up with its own CountQuery, which is not correct.
UPDATE: 3
To finish this off, looks like I can provide the Count Query as described here: Spring Data - Why it's not possible to have paging with native query
I will give this a go and update back.
I never got this to work quite how I wanted. I am sure I could by mapping my entire entity, but, that would have been painstaking. I ended up solving this by using NamedNativeQueries, with mapping for the additional Column as a result of my Case statement. My entity class is now annotated like:
#JsonInclude(JsonInclude.Include.NON_NULL)
#SuppressWarnings("unused")
#Data
#AllArgsConstructor
#NoArgsConstructor
#EqualsAndHashCode(callSuper = false)
#Entity
#Table(name = "EC2_PROVISIONING")
#SqlResultSetMappings({
#SqlResultSetMapping(
name = "listPagedMapping",
entities = {
#EntityResult(
entityClass = Ec2Instance.class
)
},
columns = {#ColumnResult(name = "permission", type = String.class)}
),
#SqlResultSetMapping(name = "listPagedMapping.count", columns = #ColumnResult(name = "cnt"))
})
#NamedNativeQueries({
#NamedNativeQuery(
name = "Ec2Instance.listAccessibleInstances",
query = ACCESSIBLE_QUERY,
resultClass = Ec2Instance.class,
resultSetMapping = "listPagedMapping"
),
#NamedNativeQuery(
name = "Ec2Instance.listAccessibleInstances.count",
resultSetMapping = "listPagedMapping.count",
query = ACCESSIBLE_QUERY_COUNT
)
})
We also dont need the permission field in this entity anymore. I removed that.
Then in my Repository:
Page<Object[]> listAccessibleInstances(
#Param("username")final String username,
#Param("instanceStates") final Set<String> instanceStates,
final Pageable pageable);
Thats it! Now the result of my case statement is returned with each entity.
Object[0] = original, default mapped entity.
Object[1] = permission