I've run into issues over the past year where some jobs would occasionally fail to start (stuck in a `new` state). I tracked them down to a situataion where `dataset.deleted` is set to `t` yet the `history_dataset_association.deleted` is `f`. Simply setting `dataset.deleted` to `f` in those instances resolved the issue and the jobs ran. The datasets have all still been on disk.

Since this is a pretty annoying situation, I thought I'd check to see if there are other datasets with this problem. Shockingly, I found many thousands of such datasets:

```
select count(d.id)
    from dataset d
    join history_dataset_association hda on d.id = hda.dataset_id
    where d.deleted = 't' and hda.deleted = 'f';
 count
-------
 76977
(1 row)
```

I'm hesitant to update so many rows in my database so I thought I'd put this out there for comment. What do others see when running the above query? Has anyone run into this or a similar issue? Thanks.

--
Lance Parsons - Scientific Programmer
Carl C. Icahn Laboratory - Room 136
Lewis-Sigler Institute for Integrative Genomics
Princeton University

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