Batch processing
Batch processing in JDBC is the ability to execute multiple SQL statements as a single batch, rather than executing them individually. This can lead to significant performance improvements, as the database only needs to parse, compile, and optimize the SQL statements once, and then execute them all together.
Here is an example of batch processing in JDBC using PreparedStatements:
String sql = "INSERT INTO employees (id, first_name, last_name) VALUES (?,?,?)";
PreparedStatement statement = connection.prepareStatement(sql);
statement.setInt(1, 1);
statement.setString(2, "John");
statement.setString(3, "Doe");
statement.addBatch();
statement.setInt(1, 2);
statement.setString(2, "Jane");
statement.setString(3, "Doe");
statement.addBatch();
int[] updateCounts = statement.executeBatch();
In this example, the PreparedStatement is created once and then used to execute multiple INSERT statements. The addBatch() method is called for each statement, and finally, the executeBatch() method is used to execute all the statements in a single batch. The method returns an array of updateCounts which holds the number of rows affected by each statement in the batch.
Batch processing is an efficient way to execute multiple SQL statements in JDBC, and is commonly used in applications that require inserting or updating large amounts of data in a database.
Leave a Comment