Jdbc Batch Insert Get Generated Keys Spring
- How to get primary key value (auto-generated keys) from inserted queries using JDBC? Description: When we are inserting a record into the database table and the primary key is an auto-increment or auto-generated key, then the insert query will generate it dynamically.
- Nov 07, 2013 For a programmer getting auto generated id of a newly inserted row in table is a little bit tricky. In this page we will learn how the spring provides an easy way to get that. Spring provides KeyHolder which helps to get auto generated key. KeyHolder is supported by JDBC 3.0.
Feb 27, 2017 A JDBC batch update is multiple updates using the same database session. That is, we don't have to open connections multiple times. In our previous example, let's say we want to insert multiple Person objects in the database. You cannot combine auto-generated keys with batch update. In any case if it is supported by your driver than your statement prepare should be changed to the code below to instruct the driver to retrieve generated keys: ps = con.prepareStatement(insert, Statement.RETURNGENERATEDKEYS). The INSERT statement is generated based on the configuration of SimpleJdbcInsert and all we need is to provide the Table name. To allow the database to generate the primary key. We looked into how we can quickly get started with Spring JDBC using a Spring Boot JDBC starter.
- Spring JDBC Tutorial
- Basic CRUD Examples
- Advanced JDBC Examples
- Spring JDBC Batch Examples
- Spring JDBC Objects
- Spring JDBC Useful Resources
- Selected Reading
Following example will demonstrate how to make a batch update using Spring JDBC. We'll update the available records in Student table in a single batch operation.
Syntax
Where,
SQL − Update query to update student's age. /generate-csr-and-private-key-windows-10.html.
jdbcTemplateObject − StudentJDBCTemplate object to update student object in database.
BatchPreparedStatementSetter − Batch executor, set values in PerparedStatement per item identified by list of objects student and index i. getBatchSize() returns the size of the batch.
updateCounts − Int array containing updated row count per update query.
To understand the above-mentioned concepts related to Spring JDBC, let us write an example which will update a batch operation. To write our example, let us have a working Eclipse IDE in place and use the following steps to create a Spring application.
| Step | Description |
|---|---|
| 1 | Update the project Student created under chapter Spring JDBC - First Application. |
| 2 | Update the bean configuration and run the application as explained below. |
Following is the content of the Data Access Object interface file StudentDAO.java.
Following is the content of the Student.java file.
Following is the content of the StudentMapper.java file.
Following is the implementation class file StudentJDBCTemplate.java for the defined DAO interface StudentDAO.
Following is the content of the MainApp.java file.
Following is the configuration file Beans.xml.
Once you are done creating the source and bean configuration files, let us run the application. If everything is fine with your application, it will print the following message.
-->The Microsoft JDBC Driver for SQL Server supports the optional JDBC 3.0 APIs to retrieve automatically generated row identifiers. The main value of this feature is to provide a way to make IDENTITY values available to an application that is updating a database table without a requiring a query and a second round-trip to the server.
Because SQL Server doesn't support pseudo columns for identifiers, updates that have to use the auto-generated key feature must operate against a table that contains an IDENTITY column. SQL Server allows only a single IDENTITY column per table. The result set that is returned by getGeneratedKeys method of the SQLServerStatement class will have only one column, with the returned column name of GENERATED_KEYS. If generated keys are requested on a table that has no IDENTITY column, the JDBC driver will return a null result set.
Jdbc Batch Size
As an example, create the following table in the sample database:
Spring Batch Jdbc
In the following example, an open connection to the sample database is passed in to the function, an SQL statement is constructed that will add data to the table, and then the statement is run and the IDENTITY column value is displayed.