JDBC | Java Batch Processing Tutorial | Jdbc Batch Processing | Batch Processing Java

Java Batch Processing Tutorial
Batch Processing Java allows you to group related SQL statements into a batch and submit them with one call to the database.

When you send several SQL statements to the database at once, you reduce the amount of communication overhead, thereby improving performance.

The addBatch() method of Statement, PreparedStatement, and CallableStatement is used to add individual statements to the batch. The executeBatch() is used to start the execution of all the statements grouped together.

The executeBatch() returns an array of integers, and each element of the array represents the update count for the respective update statement.

Just as you can add statements to a java batch for processing, you can remove them with the clearBatch() method. This method removes all the statements you added with the addBatch() method. However, you cannot selectively choose which statement to remove.

Batching with Statement Object in jdbc

Here is a typical sequence of steps to use jdbc Batch Processing with Statement Object −

Create a Statement object using either createStatement() methods.

Set auto-commit to false using setAutoCommit().

Add as many as SQL statements you like into batch using addBatch() method on created statement object.

Execute all the SQL statements using executeBatch() method on created statement object.

Finally, commit all the changes using commit() method.
Batch Processing

Complex systems often require both online and batch processing. Each kind of processing has very different requirements. Because online processing involves a user waiting on application processing order, the timing and performance of each statement execution in a process is important. Batch processing, on the other hand, occurs when a bunch of distinct transactions need to occur independently of user interaction. A bank’s ATM machine is an example of a system of online processes. The monthly process that calculates and adds interest to your savings account is an example of a batch process.

JDBC 2.0 introduced new functionality to address the specific issues of Java batch processing. Using the JDBC 2.0 batch facilities, you can assign a series of SQL statements to a JDBC Statement (or one of its subclasses) to be submitted together for execution by the database. Using the techniques you have learned so far in this book, account interest-calculation processing

Batch Processing in JDBC
Instead of executing a single query, we can execute a batch (group) of queries. It makes the performance fast.
Advantage of Batch Processing

JDBC Batch Processing
Jdbc Batch Processing allows you to group related SQL statements into a batch and submit them with one call to the database.
When you send several SQL statements to the database at once, you reduce the amount of communication overhead, thereby improving performance.

The addBatch() method of Statement, PreparedStatement, and CallableStatement is used to add individual statements to the batch. The executeBatch() is used to start the execution of all the statements grouped together.

The executeBatch() returns an array of integers, and each element of the array represents the update count for the respective update statement.

Just as you can add statements to a batch for processing, you can remove them with the clearBatch() method. This method removes all the statements you added with the addBatch() method. However, you cannot selectively choose which statement to remove.

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[technologytipsandtricks]

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