Genatragted MySQL table name by Hibernate is different - java

I am generating MySQL table by Hibernate as follows:-
#Entity
#Table(name = "buyerPartyDetails")
public class BuyerPartyDetails {
.......
}
But in MySQL the actual table name is as buyerpartydetails I was expecting it should be buyerPartyDetails. How do I force hibernte to genarate table name as my espection?

You can force Hibernate to quote the identifiers by setting:
hibernate.globally_quoted_identifiers=true
or
hibernate.globally_quoted_identifiers_skip_column_definitions=true
which will generate quoted table names in DDL. It might however require SET GLOBAL SQL_MODE=ANSI_QUOTES; as by default MySQL uses backticks ` to quote the names.

Related

Configure diff table name in hibernate for MySQL and SQL server for the same entity

I have an entity with table name "Transaction". While creating connection using spring orm and hibernate, on startup it successfully creates tables in MySQL but being "Transaction" a keyword in SQL server, it fails on startup.
I cannot change the table name in the code as there is a lot of ripple effects. Hence is there a way where I can define the table name as Transaction in java and intercept or configure in such a way that hibernate while connecting to SQL server escapes the keyword and queries it as "[Transaction]" (escaping it using [])
You can use a naming strategy as explained in this article: https://www.baeldung.com/hibernate-naming-strategy
public class CustomPhysicalNamingStrategy implements PhysicalNamingStrategy {
#Override
public Identifier toPhysicalTableName(final Identifier identifier, final JdbcEnvironment jdbcEnv) {
return Identifier.toIdentifier(**your table name**);
}
// Other methods
You can try one of the following way:
#Table(name = "`Transaction`");
#Table(name = "\"Transaction\"")
or by setting a property:
hibernate.auto_quote_keyword=true

SpringBoot JPA Hibernate DB Table name with a "." (period) in it

OK, I'm trying to connect my SpringBoot application via JPA (Hibernate) to a legacy AS/400 DB database. The table names however have a "." (Period) in them.
ex: LE.ONFP is the table name.
Hibernate however is converting the period to an underscore which causes an error because there is not table called "le_onfp".
#Entity
#Table(name = "\"LE.OFNP\"", schema = "QS36F")
Here is my annotations at the beginning of my Entity class.
adding the following line to my application.properties files fixed my issue.
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
and keeping my annotation the same.
#Table(name = "\"LE.OFNP\"", schema = "QS36F")

Create user table name with hibernate

I would like to create an object in MS SQL with hibernate, name of this table is "user". it does not work!.
I think this problem may caused by name of table/entity, user is keyword.
what should I do to have table with name "user"?
#Entity
#Table(name = "user")
public class User {
Enclose the table name in square braces:
#Entity
#Table(name = "[user]")
public class User {
That way Hibernate will escape it when it creates the table. If you put all your field and table names in square braces as a rule, you never have to consider the underlying DBMS when setting up your mappings.
<rant>It always bothered me that you had to do this. One of the major goals of Hibernate is to isolate your code from the underlying database -- I never understood why the dialect implementations don't properly handle escaping reserved keywords.</rant>
See also: Using database reserved keywords in Hibernate
I should use grave accent (`). for use keyword in hibernate we have to use (`) around keyword.
#Entity
#Table(name = "`user`")
public class CompanyUser extends

Hibernate doesn't see tables with quotes in name

I have some tables in db(postgresql) with names like this "Test".When i try create java classes from this tables with hibernate its not happening. I get classes from tables with names like this test. How to make hibernate can see tables with quotes in names?
UPDATE
Maybe i write question not correct. But i cant create java classes and i want to know how to do reverse ingenering with tables which have names in qoutes. I cant delete qoutes from table names and column names couse they have names like Type and Full.
By default, Hibernate assumes the database table name is the same as the class name, but you can override this behaviour via the #Table annotation:
#Entity
#Table(name="\"Test\"") // Will use "Test" (including the quotes) as the table name
public class Test {
The #Table annotation is used to specify the table to persist the data. The name attribute refers to the table name. If #Table annotation is not specified then Hibernate will by default use the class name as the table name. So your database's table name is "Test" then you should use your class name is "Test".
Please check your database with
select * from """Test""" if your table name is "Test".
Your entity class should be
#Entity
#Table(name = "\"\"\"Test\"\"\"")
public class Test {
}
It seems that you are not using annotations as of now...
So in case you want to use "Test" as table name you should define the mapping of POJO with your table either via annotations as defined by Bohemian
#Entity
#Table(name="\"Test\"")
public class Test {
or define in the Test.hbm.xml in which you have to map your table and fields to java class and columns.
Alternately, you can specify the schema and database name inside #Table annotation.
#Entity
#Table(name = "Test", schema = "public", catalog = "TestDatabase")
Hibernate will recognize the table without the need to escape double quotes.

Hibernate saving User model to Postgres

I'm using Postgres via Hibernate (annotations), but it seems to be falling over dealing with a User object:
12:09:16,442 ERROR [SchemaExport] Unsuccessful: create table User (id bigserial not null, password varchar(255), username varchar(255), primary key (id))
12:09:16,442 ERROR [SchemaExport] ERROR: syntax error at or near "User"
If I run the SQL manually I have to put quotes around the table name as user seems to be a postgres keyword, but how can I convince hibernate to do this itself?
Thanks in advance.
You need to escape the table name when using reserved keywords. In JPA 1.0, there is no standardized way and the Hibernate specific solution is to use backticks:
#Entity
#Table(name="`User`")
public class User {
...
}
In JPA 2.0, the standardized syntax looks like this:
#Entity
#Table(name="\"User\"")
public class User {
...
}
References
Hibernate Core documentation
5.4. SQL quoted identifiers
JPA 2.0 specification
2.13 Naming of Database Objects
User is a key word, find a better name or use quotes: "User". (bad idea imho, but it works if you do it everywhere)

Categories

Resources