MyBatis version

3.5.5

Database vendor and version

MS Sql Server 2008 R2，MS Sql Server 2019 com.microsoft.sqlserver:mssql-jdbc:8.4.0.jre8 com.microsoft.sqlserver:mssql-jdbc:7.4.1.jre8

Test case or example project

Table:

CREATE TABLE [dbo].[student](
    [id] [int] IDENTITY(1,1) NOT NULL,
    [name] [varchar](50) NOT NULL,
 CONSTRAINT [PK_student] PRIMARY KEY CLUSTERED 
(
    [id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, OPTIMIZE_FOR_SEQUENTIAL_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
GO

Entity:

public class Student implements Serializable {
    private static final long serialVersionUID = -9113130818289196330L;
    private Integer id;
    private String name;
}

dao:

public interface StudentMapper {
    int batchInsert(List<Student> list);
}

mapper:

  <insert id="batchInsert"  keyProperty="id" parameterType="java.util.List" useGeneratedKeys="true">
   insert into student (name) values
   <foreach collection="list" item="item" separator="," index="index">
     (#{item.name,jdbcType=VARCHAR})
   </foreach>
  </insert>

test:

 @Test
    void batchInsert() {
        Student student1=new Student();
        student1.setName("Jack");
        Student student2=new Student();
        student2.setName("Tom");
        List<Student>students=new ArrayList<>();
        students.add(student1);
        students.add(student2);
        studentMapper.batchInsert(students);

        students.forEach(
                e->{
                    log.info("{}",e.getId());
                }
        );
    }

Steps to reproduce

Expected result

10 9

Actual result

2020-08-03 22:42:35.691 INFO 1940 --- [ Test worker] c.e.testbatch.dao.StudentMapperTest : 10 2020-08-03 22:42:35.692 INFO 1940 --- [ Test worker] c.e.testbatch.dao.StudentMapperTest : null

Comment From: harawata

Hello @xiongbb ,

This is the same report as #1439 and the driver still does not support it, unfortunately. https://github.com/microsoft/mssql-jdbc/issues/245

Closing as there is nothing MyBatis can do.

Comment From: xiongbb

@harawata Thanks for your reply, I got it

  <select id="batchInsert"  parameterType="java.util.List"  resultType="java.lang.Integer">
        insert into student (name) output  inserted.id values
        <foreach collection="list" item="item" separator="," index="index">
            (#{item.name,jdbcType=VARCHAR})
        </foreach>
    </select>