简单优化查询-MYSQL

Question

我正在使用sakila数据库。

如何改善对国家/地区表的全索引扫描？

@Profile("test")
@Configuration
public class BeanConfig {

    @Bean
    @Primary
    public CarValidator getCarValidatorSpy(CarValidator validator) {
        CarValidator carValidatorSpy = Mockito.spy(validator);

        Mockito.doNothing().when(carValidatorSpy).validateIssueDates(Mockito.any(CarDto.class));
        return carValidatorSpy;
    }
}