How Can I Optimize Batch Inserts in Java Using JDBC?

Optimize Batch Inserts in Java Using JDBC

When performing numerous INSERT operations in a Java application, utilizing JDBC, you might encounter a need to enhance efficiency. Here's how to execute batch inserts more efficiently:

One approach is to consolidate multiple INSERT statements into a single one. Instead of sending separate INSERT queries:

insert into some_table (col1, col2) values (val1, val2)
insert into some_table (col1, col2) values (val3, val4)
insert into some_table (col1, col2) values (val5, val6)

You can combine them into:

insert into some_table (col1, col2) values (val1, val2), (val3, val4), (val5, val6)

This single INSERT will execute more efficiently by reducing network round-trips.

Furthermore, optimizing batch inserts requires leveraging prepared statements. JDBC provides the PreparedStatement class, which allows you to reuse a single prepared statement for multiple executions. Here's an example:

PreparedStatement ps = c.prepareStatement("INSERT INTO employees VALUES (?, ?)");

ps.setString(1, "John");
ps.setString(2,"Doe");
ps.addBatch();

ps.clearParameters();
ps.setString(1, "Dave");
ps.setString(2,"Smith");
ps.addBatch();

ps.clearParameters();
int[] results = ps.executeBatch();

This approach allows for parameter caching and other optimizations that enhance performance. By using prepared statements, you can execute multiple INSERTs efficiently and ensure data integrity.

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