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Judul : Jdbc Batch Insert Too Update Event Inward Coffee Amongst Preparedstatement
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Jdbc Batch Insert Too Update Event Inward Coffee Amongst Preparedstatement

JDBC API inwards Java allows programme to batch insert together with update information into database, which tends to supply ameliorate functioning past times uncomplicated virtue of fact that it cut lot of database round-trip which eventually improves overall performance. In fact it’s 1 of JDBC best practices to insert together with update information inwards batches. For those who doesn’t know what is batch insert together with update, Java provides several ways to execute SQL queries, 1 of them is JDBC batch insert together with update, on which instead of executing sql query 1 past times 1 using either Statement or PreparedSatement, you lot execute query inwards batch together with ship a batch of query to database for execution instead of unmarried query. Since multiple queries are combined into batch together with 1 batch is sent to database instead of private queries, it cut database circular trip past times gene of batch size. Batch size tin live on anything only needs to live on decided carefully. JDBC specification supports upto 100 only private database e.g. Oracle, MySQL, Sybase or SQL Server has in that place ain boundary on maximum batch size, , normal jdbc batch size ranges from 50 to 100. JDBC API provides addBatch() method to add together queries into batch together with than afterwards execute them using executeBatch() method. Both Statement together with PreparedStatement tin live on used to execute batch queries inwards Java. By the agency batch insert together with update also supply functioning boost to Data access Object or DAO layer,  as discussed inwards our concluding post service 4 ways to improve Performance of JDBC applications.

How to run batch insert together with update inwards JDBC

There are multiple ways you lot tin run batch queries inwards Java application, You conduct keep alternative of using plainly quondam JDBC or you lot tin leverage Spring's JdbcTemplate Utility class. Though both Statement together with PreparedStatment tin execute batch queries, It’s ameliorate to purpose PreparedStatement because of several benefits it provides including improved functioning together with prevention from SQL injection every bit suggested on Why you lot should purpose PreparedStatement inwards Java. In side past times side section, nosotros volition compare functioning of same INSERT SQL query when running every bit without batch together with running every bit batch insert query. In both cases nosotros volition purpose PreparedStatement to brand testing similar.

SQL query without JDBC batch update using PreparedStatement

Here is an illustration of running SQL query without using JDBC batch update. Performance of this illustration tin live on used to compare how JDBC Batch update perform.

//query for inserting batch data
        String query = "insert into employee values (?,?,NULL)";
        PreparedStatement pStatement = conn.prepareStatement(query);
     
        long startTime = System.currentTimeMillis();
        for(int count = 0; count < 1000; count++ ){
            pStatement.setString(1, Integer.toString(count));
            pStatement.setString(2, "Employee"+count);
            pStatement.executeUpdate();
        }
        long endTime = System.currentTimeMillis();
        long elapsedTime = (endTime - startTime)/1000; //in seconds
        System.out.println("Total fourth dimension required to execute chiliad SQL INSERT queries using PreparedStatement without JDBC batch update is :" + elapsedTime);

Output:
Total fourth dimension required to execute 1000 queries using Statement without JDBC batch update is :38

So it took 38 seconds to insert chiliad records on employee tabular array on MySQL database running on localhost. Yes, indeed its quite high only don't bother most absolute divulge yet, what is of import hither is to discovery out whether JDBC batch insert or update gives ameliorate functioning or not. By the agency higher upward illustration uses PreparedStatement together with bind variables to ensure standard JDBC practices are followed.

JDBC Batch INSERT illustration using PreparedStatement

Now, let’s run same laid of SQL query every bit JDBC batch INSERT. In this example, instead of running every SQL INSERT query every bit executeUpdate() , nosotros are adding them inwards a batch using addBatch() method together with 1 time nosotros reaches batch size, which is 100 here, nosotros ship them to database using executeBatch() method of JDBC API.

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;

/**
  * Java programme to demonstrate JDBC Batch Insert example. Inserting information inwards batch
  * seems to improve functioning a lot. executeBatch() method of PreparedStatement is
  * used to run batch queries inwards Java JDBC.
  */
public class MySQLJdbcExample {

    public static void main(String args[]) throws SQLException {
     
        //creating JDBC Connection to mysql database
        String url="jdbc:mysql://localhost:3306/test";
        Connection conn = DriverManager.getConnection(url, "root", "root");
       // conn.setAutoCommit(false); continue auto commit fake for ameliorate performance

        //query for inserting batch data
        String query = "insert into employee values (?,?,NULL)";
        PreparedStatement pStatement = conn.prepareStatement(query);
        int batchSize = 100;
     
        long startTime = System.currentTimeMillis();
        for (int count = 0; count < 1000; count++) {
            pStatement.setString(1, Integer.toString(count));
            pStatement.setString(2, "Employee" + count);
            pStatement.addBatch();
         
            if (count % batchSize == 0) {
                pStatement.executeBatch();
            }
        }

       pStatement.executeBatch() ; //for remaining batch queries if amount tape is strange no.
     
     // conn.commit();
        pStatement.close();
        conn.close();
        long endTime = System.currentTimeMillis();
        long elapsedTime = (endTime - startTime)/1000; //in seconds
        System.out.println("Total fourth dimension required to execute chiliad queries using PreparedStatement amongst JDBC batch insert is :" + elapsedTime);

     
     
    }
}

Output:
Total fourth dimension required to execute 1000 queries using PreparedStatement amongst JDBC batch insert is :28

So JDBC batch insert together with update does gives us ameliorate functioning over queries running without batches. One of the of import affair which I conduct keep non used hither is, I conduct keep non disabled auto commit mode. You should e'er run SQL query amongst auto-commit agency disabled fifty-fifty amongst JDBC Batch insert together with update example together with produce commit() explicitly. That volition farther boost functioning of your JDBC code. Try running higher upward code amongst auto commit agency disabled together with it won't conduct keep fifty-fifty a instant to execute.

Benefits of using JDBC batch update:

Significant improvement inwards functioning tin live on achieved past times using JDBC batch update together with insert. Since inwards instance of batch queries, You effectively cut database round-trip,  You relieve a lot of fourth dimension spent on network latency, which results inwards ameliorate functioning of Java application. Always combine JDBC batch insert or update amongst PreparedStatement to larn best of both globe together with also follow these Top 10JDBC best practices spell writing JDBC code inwards Java. e.g. running SQL query amongst auto-commit agency disabled.

That's all on how to run JDBC Batch insert together with update inwards Java. We conduct keep seen how using JDBC batch insert tin improve functioning and  how nosotros tin execute PreparedStatement queries inwards batch. Choose batch size based on what suits your application together with run query amongst auto commit agency disabled for ameliorate performance.

Further Learning
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