JDBC for Oracle - Herong's Tutorial Examples - v3.13, by Herong Yang
PreparedStatement in Batch Mode
This section describes how to use PreparedStatement objects in batch mode.
If you want to execute a PreparedStatement object multiple times in a single transaction, you can use the batch feature of the PreparedStatement object. Each time the addBatch() method is called, a copy of the embedded SQL statement will be created, but not executed until the execution method call. Here is sample sequence of method calls to execute a PreparedStatement object in batch mode:
ps.setXXX(...); // Set parameters for the first copy ... ps.addBatch(); // Create the first copy of the SQL statement ps.setXXX(...); // Set parameters for the second copy ... ps.addBatch(); // Create the second copy of the SQL statement ps.setXXX(...); // Set parameters for the third copy ... ps.addBatch(); // Create the third copy of the SQL statement ps.executeBatch(); // Execute all copies together as a batch
Here is a sample program that creates a PrepareStatement object and executes it in batch mode to run an INSERT statement 4 times:
/* OraclePreparedStatementBatch.java * Copyright (c) HerongYang.com. All Rights Reserved. */ import java.sql.*; public class OraclePreparedStatementBatch { public static void main(String [] args) { Connection con = null; try { oracle.jdbc.pool.OracleDataSource ds = new oracle.jdbc.pool.OracleDataSource(); ds.setDriverType("thin"); ds.setServerName("localhost"); ds.setPortNumber(1521); ds.setDatabaseName("XE"); ds.setUser("Herong"); ds.setPassword("TopSecret"); con = ds.getConnection(); // PreparedStatement PreparedStatement ps = con.prepareStatement( "INSERT INTO Profile (ID, FirstName, LastName)" + " VALUES (?, ?, ?)"); // Provide values to parameters for copy 1 ps.setInt(1,101); ps.setString(2,"John"); ps.setString(3,"First"); // Create copy 1 ps.addBatch(); // Provide values to parameters for copy 2 ps.setInt(1,102); ps.setString(2,"Bill"); ps.setString(3,"Second"); // Create copy 2 ps.addBatch(); // Provide values to parameters for copy 3 ps.setInt(1,103); ps.setString(2,"Mark"); ps.setString(3,"Third"); // Create copy 3 ps.addBatch(); // Provide values to parameters for copy 4 ps.setInt(1,104); ps.setString(2,"Jack"); ps.setString(3,"Last"); // Create copy 4 ps.addBatch(); // Execute all 4 copies int[] counts = ps.executeBatch(); int count = 0; for (int i=0; i<counts.length; i++) { count += counts[i]; } System.out.println("Total effected rows: "+count); // Close the PreparedStatement object ps.close(); con.close(); } catch (Exception e) { e.printStackTrace(); } } }
Here is the output:
herong> java -cp .;ojdbc11.jar OraclePreparedStatementBatch Total effected rows: 4
But the ojdbc6.jar JDBC driver was giving me incorrect output:
herong> \Progra~1\java\jdk1.8.0_45\bin\javac \ -cp .;ojdbc6.jar OraclePreparedSelect.java Total effected rows: -8
I looked at the Profile table in the database with SQL*Plus and saw 4 new rows inserted correctly. But the Oracle JDBC driver returned the counts of affected row incorrectly. This seems to be a bug in the JDBC driver.
Table of Contents
JDBC (Java Database Connectivity) Introduction
Oracle Express Edition Installation on Windows
Oracle - Reference Implementation of JdbcRowSet
PreparedStatement with Parameters
►PreparedStatement in Batch Mode
Performance of Inserting Rows with a PreparedStatement
Performance of Inserting Rows with a Regular Statement
Performance of Inserting Rows with a ResultSet
Oracle - JBDC CallableStatement
Oracle CLOB (Character Large Object) - TEXT
Oracle BLOB (Binary Large Object) - BLOB