executeQueryForObject returned too many results

Question

有一个SQL：

select coalesce(count(1),0) from table where searchDt=#searchDt#

ibatis Dao层是这么写的：

public Integer findCount(String searchDt) throws SQLException {

    return (Integer)this.get().queryForObject("xxxxx",searchDt);

｝

现在提示错误：

java.sql.SQLException: Error: executeQueryForObject returned too many results.

    at com.ibatis.sqlmap.engine.mapping.statement.GeneralStatement.executeQueryForObject(GeneralStatement.java:108)

    at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:566)

    at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:541)

    at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForObject(SqlMapSessionImpl.java:106)

    at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForObject(SqlMapClientImpl.java:83)

    at com.boco.monitor.dao.xxxxDao.findCount(xxxxDao.java:112)

    at com.boco.monitor.service.xxxxService.xxxxAnalysis(xxxxService.java:882)

    at com.boco.monitor.task.Task.run(Task.java:35)

    at java.util.TimerThread.mainLoop(Timer.java:555)

    at java.util.TimerThread.run(Timer.java:505)

奇了怪了，这SQL打死也不能查出多条结果啊？

Answer 1

确认一下传入的参数searchDt名字和值有没有问题列表项目

Answer 2

提示已经很清楚了。queryForObject只需要1条记录，但实际返回了多条记录。