I save UUID without slashes as varbinary(16) in MySql. I will like to use annotation to map this field in Hibernate. Am I able to do it? Please help.
Here is my mapping:
#Id
#GeneratedValue(generator = "uuid")
#GenericGenerator(name = "uuid", strategy = "uuid2")
#Column(name = "PRODUCT_ID", unique = true)
private String productId;
Here is my insert:
INSERT INTO `item`
(`ID`,
`TITLE`)
VALUES
(
UNHEX('f4e01440cfd011e39c1a0800200c9a66'),
'Apple'
);
But id become something like ��%14#��%11��%1A%08%00 %0C�f in my code.
Related
In liquibase I added a script for creating a database and also use in Java / Spring Entity with GeneratedValue and my SequenceGenerator. In the case of the script in liquibase, do I have to add the generation of the identifier with the sequence to it, or is it enough that I have it from the level of my entity?
#SequenceGenerator(name = "TEST_DATA_SEQ", sequenceName = "TEST_DATA", initialValue = 1, allocationSize = 1)
public class TestPPData {
#Id
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "TEST_DATA_SEQ")
#Column(name = "ID", nullable = false)
private Long id;
CREATE TABLE TEST_DATA
(
ID NUMBER(10) PRIMARY KEY,
....
);
COMMENT ON COLUMN TEST_DATA.ID IS 'Primary key';
And my LB
- changeSet:
id: test
author: test
changes:
- sqlFile:
dbms: oracle
encoding: utf8
path: scripts/test.sql
relativeToChangelogFile: true
splitStatements: true
stripComments: false
or I must need add ?
createSequence:
incrementBy: 1
sequenceName: TEST_DATA_SEQ
startValue: 1
Below is the entity configuration:
#Entity
#SequenceGenerator(
name = "sessionInfoIdSeq",
sequenceName = "SESSIONINFO_ID_SEQ"
)
public class SessionInfo implements Transformable {
#Id
#GeneratedValue(
strategy = GenerationType.AUTO,
generator = "sessionInfoIdSeq"
)
private Long id;
This means when inserting data into the database, the id will be fetched from the SESSIONINFO_ID_SEQ:
select nextval ('SESSIONINFO_ID_SEQ')
But the problem is, the next sequence number get by Spring boot app + Hibernate is not being the same as when we run the native query in DataGrip or DBeaver, although I've seen the app used the same query that used in Datagrip.
Spring boot + hibernate at runtime: 12749
Running native query in DataGrip: 12797
I'm not sure why this is appearing. But the question is how can I sync the sequence number, to when the app takes a new one, we can see the same on Datagrip or DBeaver.
Let me know if the question is existing or not correct. Thank you in advance for all your support.
Use can use attribute level annotations as follows:
#Id
#GeneratedValue(generator = "sequence-generator")
#GenericGenerator(
name = "sequence-generator",
strategy = "org.hibernate.id.enhanced.SequenceStyleGenerator",
parameters = {
#Parameter(name = "sequence_name", value = "SESSIONINFO_ID_SEQ"),
#Parameter(name = "initial_value", value = "4"),
#Parameter(name = "increment_size", value = "1")
}
)
private long id;
I am using hibernate to create entity. The attributes I used are as below :
#Id
#SequenceGenerator(name = "customer-id-gen", sequenceName = "CUSTOMERS_SEQ", allocationSize = 1)
#GeneratedValue(generator = "customer-id-gen", strategy = GenerationType.SEQUENCE)
#Column(name = "CUSTOMER_ID", length = 4, nullable = false)
private int customerId;
#Column(name = "CUSTOMER_NAME", length = 40, unique = false, nullable = false)
private String customerName;
#Column(name = "PHONE_NO", unique = true, nullable = true, length = 10)
private Long phoneNo;
However as i can see through logs that table created is as following structure :
create table CUSTOMER_ALL (
CUSTOMER_ID number(10,0) not null,
CUSTOMER_NAME varchar2(40 char) not null,
PHONE_NO number(19,0) unique,
primary key (CUSTOMER_ID)
)
I am not able to figure out how the phone_no attribute is converted into 19 size and customer_id to 10 ?
As per JPA, length only applies to String types.
Type 'int' controlled the storage size of CUSTOMER_ID.
Type 'Long' controlled the storage size of PHONE_NO.
Do you really want a phone number to be a Long? Better a String?
I am new to hibernate and I want to insert primary number in my table for unique identification. I am using Oracle as my database so do I need to create sequence in oracle to get auto increment generation number ?
I am using below code but it is not working. I have not created any sequence yet.
#Id
#Column(name = "id" )
#GeneratedValue ( strategy = GenerationType.TABLE)
I have used AUTO, SEQUENCE and IDENTITY but nothing works for me.
this is one way of using Oracle sequence in a JPA mapped entity:
#Id
#Column(name = "ID")
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "SEQUENCE_NAME")
#SequenceGenerator(name = "SEQUENCE_NAME", sequenceName = "SEQUENCE_NAME", allocationSize = 1, initialValue = 1)
In this way your persist() method will ask for the next value of the sequence in order to use it as ID for your entry.
You can ue this #GeneratedValue(strategy=GenerationType.AUTO)
#Id
#Column(name = "id" )
#GeneratedValue(strategy=GenerationType.AUTO)
In GenerationType.TABLE option, ID value will be filled with the column of other table.
If you are using strategy=GenerationType.TABLE you will require to mention the Table from where your ID will be filled.
For example,
#GeneratedValue(strategy=GenerationType.TABLE, generator="course")
#TableGenerator(
name="course",
table="GENERATOR_TABLE",
pkColumnName = "key",
valueColumnName = "next",
pkColumnValue="course",
allocationSize=30
)
And for other option, you can use GenerationType.AUTO option, and let hibernate decide which option to choose according to databse.
#Id
#Column(name = "id" )
#GeneratedValue (strategy = GenerationType.AUTO)
And make sure that you properly configured hibernate.cfg.xml file.
I want to insert in data base using hibernate in different processes, I get this exception
Duplicate entry '58576' for key 'PRIMARY'
My Generation strategy was Generator.Table.
I changed it to Generator.identity, but get the exception
field dbid doesn't have default value
How can I solve this problem?
my Entity:
#Id
#TableGenerator(name="dbidn",table="dbidpktn",pkColumnName="dbkeyn",
pkColumnValue="dbvaluen",allocationSize=1)
#GeneratedValue(strategy = GenerationType.TABLE, generator = "dbidn")
private Long dbid;
If you would like to use DB dependent IDs try
#GeneratedValue(strategy = GenerationType.AUTO)
And set the primary key field filling on DB level
#Id
#GenericGenerator(name = "announcement", strategy = "increment")
#GeneratedValue(generator = "announcement")
private Integer announcementId;
use GenericGenerator