小编Hik*_* G.的帖子

对于所有结果,good_name列为null.查询中存在什么问题？

select fp.id,
   listagg(fpg.name, ',') within group(order by fpg.name) good_name
from fp_place_goods fppg join 
   fp_places fp on fppg.place_id = fp.id join
   fp_goods fpg on fppg.good_id = fpg.id
GROUP BY fp.id

however query below works

select fp.id,
   listagg(fpg.id, ',') within group(order by fpg.id) good_ids
from fp_place_goods fppg join 
   fp_places fp on fppg.place_id = fp.id join
   fp_goods fpg on fppg.good_id = fpg.id
GROUP BY fp.id




select fp.id, fpg.name from fp_places fp join
      fp_place_goods fppg on fp.id = fppg.place_id join
      fp_goods fpg on …

我希望根据它的值延迟一个可观察对象。例如：

of(someBool).pipe(delay(1000))

如果someBool为false，则跳过延迟，但为true时，请稍等片刻。