在一个service中调mapper查多次导致方言代理为空

[youglu]

• [ ] 我已在 issues 搜索类似问题，并且不存在相同的问题.

异常模板

使用环境

• PageHelper 版本: 5.3.1
• 数据库类型和版本: mysql5.7
• JDBC_URL: xxx

分页报空指错误

分页参数

public List<Map> statistic(final Map<String,Object> paramMap) {
        // 按同步状态统计
       // final Map<String,Object> paramMap = new HashMap<>();
        paramMap.put("statusStatistic","1");
        paramMap.put("status",1);
        List<Map> result = formSyncTaskMapper.statistic(paramMap);
        paramMap.put("status","0");
        List<Map> inRunResult = formSyncTaskMapper.statistic(paramMap);
        result.addAll(inRunResult);

        paramMap.clear();
        paramMap.put("platformStatistic","1");
        List<Map> platFormResult = formSyncTaskMapper.statistic(paramMap);
        result.addAll(platFormResult);
        return result;
    }

原 SQL

    <select id="statistic" parameterType="java.util.Map" resultType="java.util.Map">
        <if test="statusStatistic != null and status != ''">
            SELECT count(0) taskInfo FROM form_sync_task formTask LEFT JOIN sys_job sysjob ON task_id = job_id
            where sysjob.status = 1
        </if>
        <if test="platformStatistic != null">
            SELECT sync_platform ,count(sync_platform) platformInfo  FROM form_sync_task formTask
            group by sync_platform
        </if>
    </select>

期望的结果：

完整异常信息

Caused by: org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.lang.NullPointerException
### Cause: java.lang.NullPointerException
    at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:30)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:153)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:145)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:140)
    at sun.reflect.GeneratedMethodAccessor125.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:427)
    ... 127 common frames omitted
Caused by: java.lang.NullPointerException: null
    at com.github.pagehelper.PageHelper.beforeCount(PageHelper.java:58)
    at com.github.pagehelper.PageInterceptor.intercept(PageInterceptor.java:119)
    at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:62)
    at com.sun.proxy.$Proxy221.query(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.ibatis.plugin.Invocation.proceed(Invocation.java:49)
    at com.union.framework.interceptor.PageDialectInterceptor.intercept(PageDialectInterceptor.java:65)
    at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:62)
    at com.sun.proxy.$Proxy221.query(Unknown Source)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:151)
    ... 133 common frames omitted

其他类型的错误

功能建议

目前发现此情况下会导致分页中方言代事会丢失，导致空指异常。

[abel533]

在哪儿调用了分页方法？