What is the purpose of the Executor interface in MyBatis?

The Executor interface in MyBatis is mainly responsible for the actual execution of SQL statements, making it one of the most essential interfaces in MyBatis. It defines basic methods for database operations such as insert, update, delete, and query. The Executor is in charge of executing the SQL statements and mapping the results into Java objects to return to the caller. Implementation classes of the Executor interface, such as SimpleExecutor and ReuseExecutor, use different execution strategies to handle SQL statements in order to enhance execution efficiency and performance. Through the Executor interface, MyBatis is able to achieve flexible SQL execution and result mapping, providing powerful persistence functionality.