Is there a way to use DISTINCT on a single field in Rose::DB?
I have a table like
+----+---------------------+-----------+
| id | event_time | some_val |
+----+---------------------+-----------+
| 1 | 2006-12-03 09:15:00 | 1 |
| 2 | 2006-12-03 09:15:00 | 2 |
| 3 | 2006-12-03 09:15:00 | 3 |
| 4 | 2006-12-03 09:15:00 | 4 |
| 5 | 2006-12-03 09:16:00 | 1 |
| 6 | 2006-12-03 09:16:00 | 2 |
| 7 | 2006-12-03 09:16:00 | 3 |
| 8 | 2006-12-03 09:16:00 | 4 |
| 9 | 2006-12-03 09:17:00 | 1 |
| 10 | 2006-12-03 09:17:00 | 2 |
+----+---------------------+-----------+
and I'd like to perform a query like
SELECT DISTINCT some_val from some_table
WHERE event_time > ...
to get all distinct values of some_val after a given time. Using
my $events = WatchLAN::Activity::Manager->get_some_table(
query => [ event_time => { gt => ... },
],
distinct => 1,
);
yields
SELECT DISTINCT id, event_time, some_val from some_table
WHERE event_time > ...
since I'm using Rose::DB::Object::Loader, and all columns are mapped
automatically into Rose. The latter of course doesn't return
distinct values of some_val, but distinct rows.
Is there a way to say "just fetch these columns and use distinct"
in the manager or is there a better way to get the distinct
values of some_val?
-- Mike
Mike Schilli
[EMAIL PROTECTED]
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