JDBC CallableStatement
CallableStatement extends PreparedStatement to call stored procedures and functions defined in the database, useful for complex business logic maintained in the DB layer.
Calling a Stored Procedure
String sql = "{call get_customer_orders(?, ?)}";
CallableStatement cs = conn.prepareCall(sql);
cs.setInt(1, customerId); // IN parameter
cs.registerOutParameter(2, Types.INTEGER); // OUT parameter
cs.execute();
int orderCount = cs.getInt(2);When to Use Stored Procedures
- Complex multi-step operations already defined in the database.
- Legacy enterprise systems with business logic in PL/SQL or T-SQL.
- Performance-critical batch operations close to data.
- Prefer application-layer logic in modern microservices unless DB team owns procedures.
Frequently Asked Questions
CallableStatement vs PreparedStatement?▼
Use PreparedStatement for standard SQL. Use CallableStatement specifically for stored procedure calls with {call proc_name(?,?)} syntax.