Question

我的Jasperreport中的SQL查询出了问题。查询是这样的：

select distinct 
  t.costcenter, 
  t.workplace, 
  t.sap_master_key, 
  t.product_family, 
  mb.max_module_name
from 
  timings t, 
  max_bbz_per_timing mb
where (
       ($P{Kostenstelle}  is not null and  
        $P{APS} is not null 
        and t.timing_id in (
          select 
            timing_id 
          from 
            timings 
          where costcenter = $P{Kostenstelle} 
          and workplace =  $P{APS} 
        )
       )
       or
        ($P{Kostenstelle} is not null 
         and $P{APS} is null 
         and t.timing_id in (
           select 
             timing_id 
           from 
             timings 
           where costcenter = $P{Kostenstelle}
         )
       )
       or
        ($P{Kostenstelle} is null 
         and $P{APS} is not null 
         and t.timing_id in (
           select 
             timing_id 
           from 
             timings 
           where workplace = $P{APS} 
         )
       )
    )
and mb.timing_id =t.timing_id
and mb.max_module_name is not null

$P{Kostenstelle}和$P{APS}是参数。它们都不能为空或只有其中之一。当我在我的开发环境中尝试这个SQL查询时，它会做它应该做的事情，但在JasperSoft Studio中它只在$P{Kostenstelle} is not null and $P{APS} is null时执行，否则它显示没有结果，尽管它应该。

我希望你们中的某些人可以在这里帮助我，我一无所知。

Answer 1

这个庞大的SQL脚本就等同于：

    HumanPlayer humanPlayer = new HumanPlayer(name); // Renamed
    AiPlayer aiPlayer = new AiPlayer("Computer", 0); 

    player.add(humanPlayer); 
    player.add(aiPlayer);

如果select distinct t.costcenter, t.workplace, t.sap_master_key, t.product_family, mb.max_module_name from timings t inner join max_bbz_per_timing mb on mb.timing_id = t.timing_id and mb.max_module_name is not null inner join timings t_t on t_t.timing_id = t.timing_id and ($P{Kostenstelle} is not null or $P{APS} is not null) and ($P{Kostenstelle} is null or t_t.costcenter = $P{Kostenstelle}) and ($P{APS} is null or t_t.workplace = $P{APS})是唯一的，则查询可以更直接：

timing_id

SQL查询适用于开发人员，但不适用于JasperSoft Studio

1 个答案: