Question

我对mybatis很新，一直试图调用一个从mybatis返回游标的函数。以下是一些代码段：

PL / SQL功能：

FUNCTION student_fetch(
  p_id      VARCHAR2,
  p_usr_id       VARCHAR2,
  p_program_code VARCHAR2)
 RETURN t_students_cursor
IS
 cur t_students_cursor;
 --v_cnt INT;
BEGIN
 --check_student_info_permission(p_osis_id, p_usr_id, p_program_code, v_cnt);
 --IF v_cnt  > 0 THEN
 OPEN cur FOR SELECT srec.First_Name, srec.Last_Name, srec.Middle_Initial,

XML条目：

   <resultMap id="accountDetailResult" type="student">
     <result property="firstName" column="First_Name" />
    <result property="lastName" column="Last_Name" />

    </resultMap>

    <select id="getAccountDetail" parameterType="map" statementType="CALLABLE">
   { #{t_students_cursor,jdbcType=CURSOR,mode=OUT,resultMap=accountDetailResult,javaType=java.sql.ResultSet} = 
    call students.student_fetch(#{osisId,jdbcType=VARCHAR,mode=IN}, #{userId,jdbcType=VARCHAR,mode=IN},#{programCode,jdbcType=VARCHAR,mode=IN})}

 </select>

POJO班级：

public class Student {



    private String firstName;

    private String lastName;


    private String emailAddress;

    private String daytimeTelephoneNumber;

    private String id;

    private String userId;

    private String programCode;

映射器接口：

void getAccountDetail(@Param("map") Map<String, Object> parameter);

测试员类：

 Map<String, Object> param = new HashMap<String, Object>();
    param.put("p_d", "214996787");
    param.put("p_usr_id", "admin");
    param.put("p_program_code", null);
    productServiceObj.getAccountDetail(param);
    Student st = (Student)param.get("t_students_cursor");

例外：

org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.lang.NullPointerException
### The error may involve com.example.services.ProductServices.getAccountDetail-Inline
### The error occurred while setting parameters
### Cause: java.lang.NullPointerException
    at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:8)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:61)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:53)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectOne(DefaultSqlSession.java:38)
    at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:66)
    at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:35)
    at $Proxy1.getAccountDetail(Unknown Source)
    at com.example.runner.AppTester.main(AppTester.java:79)
Caused by: java.lang.NullPointerException
    at oracle.jdbc.driver.T4C8Oall.getNumRows(T4C8Oall.java:870)
    at oracle.jdbc.driver.T4CCallableStatement.executeForRows(T4CCallableStatement.java:960)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1168)
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3285)
    at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3390)
    at oracle.jdbc.driver.OracleCallableStatement.execute(OracleCallableStatement.java:4223)

Answer 1

一个引人注目的调整：

#{t_students_cursor,jdbcType=CURSOR,mode=OUT,resultMap=accountDetailResult,javaType=java.sql.ResultSet} =  call students.student_fetch(#{osisId,jdbcType=VARCHAR,mode=IN}, #{userId,jdbcType=VARCHAR,mode=IN},#{programCode,jdbcType=VARCHAR,mode=IN})}

是正确的方法。 “call”应该与“＃{t_students_cursor，jdbcType = CURSOR，mode = OUT，resultMap = accountDetailResult，javaType = java.sql.ResultSet} =”

内联

从mybatis中的光标中获取数据

1 个答案: