callablestatement不通过java

Question

我遇到需要从MySQL数据库中获取结果集的情况。但问题是，当我使用prep / callable语句时，我没有获得结果集，但是当通过toad或phpmyadmin运行相同的sql查询时，它会在控制台上给出正确和预期的结果。代码如下： -

    Connection connection = null;
    CallableStatement cstmt = null;
    String mappedEVentIds = "";
    try {
        connection = CreateDBConnection.createDBConn();
        cstmt = connection.prepareCall("select metaEventId from metatologtable where metatologtable.baseEventId in (select `metatologtable`.baseEventId from metatologtable inner join logtable on logtable.baseEventId = metatologtable.baseEventId where metatologtable.metaEventId In"+metaEventIds+")");
        ResultSet rs = cstmt.executeQuery();
        while(rs.next()){
            mappedEVentIds = mappedEVentIds+rs.getString("metaEventId");

        }
        return mappedEVentIds;
    }
    catch(Exception e){

    }
    finally{
        closeConnection(connection, cstmt);
    }

它没有抛出任何错误，但是结果集为空，并且在（rs.next）阻止时没有进入