Mybatis plus calls its own method and reports an error invalid bound statement

1. Check for version conflicts

<dependency>
  <groupId>com.baomidou</groupId>
  <artifactId>mybatis-plus</artifactId>
  <version>3.4.3</version>
  <scope>compile</scope>
</dependency>

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.4.3</version>
</dependency>

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-extension</artifactId>
    <version>3.4.3</version>
    <scope>compile</scope>
</dependency>

2. Check the path and namespace correspondence

Check scan compile path

MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapping/publicDB/**/*.xml"));

or

<build>
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.xml</include>
            </includes>
        </resource>
    </resources>
    <resource>
	    <directory>src/main/resources</directory>
	    </resource>
    </resources>
</build>

Check the incoming basemapper path

import com.baomidou.mybatisplus.core.mapper.BaseMapper;

Check the namespace and function name correspondence of the XML file to ensure that no error is reported during compilation, and remove the Chinese comments in the XML file

3. Use mybatissqlsessionfactory

/**
 * Create SqlSessionFactory
 */
@Bean(name = "primarySqlSessionFactory")
@Primary
public SqlSessionFactory testSqlSessionFactory(@Qualifier("primaryDataSource") DataSource dataSource) throws Exception {
    
    // Do not use the original of SqlSessionFactory instead of using MybatisSqlSessionFactory
    MybatisSqlSessionFactoryBean bean = new MybatisSqlSessionFactoryBean();
    bean.setDataSource(dataSource);
    bean.setMapperLocations(new PathMatchingResourcePatternResolver().getResources("classpath*:mapping/publicDB/**/*.xml"));

    return bean.getObject();
}

Mybatisplusconfig configuration class configured in the original blog post:

import com.baomidou.mybatisplus.core.MybatisConfiguration;
import com.baomidou.mybatisplus.core.MybatisXMLLanguageDriver;
import com.baomidou.mybatisplus.core.toolkit.ObjectUtils;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.spring.MybatisSqlSessionFactoryBean;
import org.apache.ibatis.mapping.DatabaseIdProvider;
import org.apache.ibatis.plugin.Interceptor;
import org.mybatis.spring.boot.autoconfigure.MybatisProperties;
import org.mybatis.spring.boot.autoconfigure.SpringBootVFS;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.DefaultResourceLoader;
import org.springframework.core.io.ResourceLoader;
import org.springframework.util.StringUtils;

import javax.sql.DataSource;

@Configuration
public class MybatisPlusConfig {
    @Autowired
    private DataSource dataSource;
    @Autowired
    private MybatisProperties properties;
    @Autowired
    private ResourceLoader resourceLoader = new DefaultResourceLoader();
    @Autowired(required = false)
    private Interceptor[] interceptors;
    @Autowired(required = false)
    private DatabaseIdProvider databaseIdProvider;

    /** mybatis-plus */
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        PaginationInterceptor page = new PaginationInterceptor();
        page.setDialectType("mysql");
        return page;
    }

    /** All resources that are already loaded automatically by mybatis-autoconfigure are used here. Instead of manually specifying the <p> configuration file and mybatis-boot's configuration file synchronization @return */
    @Bean
    public MybatisSqlSessionFactoryBean mybatisSqlSessionFactoryBean() {
        MybatisSqlSessionFactoryBean mybatisPlus = new MybatisSqlSessionFactoryBean();
        mybatisPlus.setDataSource(dataSource);
        mybatisPlus.setVfs(SpringBootVFS.class);
        if (StringUtils.hasText(this.properties.getConfigLocation()))
            mybatisPlus.setConfigLocation(this.resourceLoader.getResource(this.properties.getConfigLocation()));
        if (!ObjectUtils.isEmpty(this.interceptors)) mybatisPlus.setPlugins(this.interceptors);
        MybatisConfiguration mc = new MybatisConfiguration();
        mc.setDefaultScriptingLanguage(MybatisXMLLanguageDriver.class);
        // Database field design for hump naming, the default open hump to underscore will report an error field can not be found
        mc.setMapUnderscoreToCamelCase(true);
        mybatisPlus.setConfiguration(mc);
        if (this.databaseIdProvider != null) mybatisPlus.setDatabaseIdProvider(this.databaseIdProvider);
        if (StringUtils.hasLength(this.properties.getTypeAliasesPackage()))
            mybatisPlus.setTypeAliasesPackage(this.properties.getTypeAliasesPackage());
        if (StringUtils.hasLength(this.properties.getTypeHandlersPackage()))
            mybatisPlus.setTypeHandlersPackage(this.properties.getTypeHandlersPackage());
        if (!ObjectUtils.isEmpty(this.properties.resolveMapperLocations()))
            mybatisPlus.setMapperLocations(this.properties.resolveMapperLocations());
        return mybatisPlus;
    }
}