its not built into Query() at the moment so the closest you could get
would be query.from_statement(some_statement). you can probably go
from query->select()->back to query again doing something like this:
q = query.<build up your query>
session.query(...).from_statement(q.statement.prefix_with
("SQL_CALC_FOUND_ROWS..."))
On Aug 29, 2009, at 2:47 AM, robert rottermann wrote:
>
> Michael Bayer schrieb:
>> use the "prefixes" argument to select() for this.
>>
> thanks very much.
> it it possible to use this somehow with session.query?
>
> I do not use select at all, but do construct the queries dynamically
> like so:
>
> q = session.query(tblNewsletteremail)
> c = tblNewsletteremail.__table__.c
> for k,v in info.items():
> if isinstance(v, tuple):
> op, v = v
> if op == 'like':
> q = q.filter(c[k].like('%' + v + '%'))
> if op == 'in':
> q = q.filter(c[k].in_(v))
> else:
> q = q.filter(c[k] == v)
> if order_by:
> for e in order_by:
> q = q.order_by(c[e])
> if limit:
> q = q.limit(limit)
> result = q.all()
> now I would like to "apply" SQL_CALC_FOUND_ROWS to the query object
> before
> executing it. is this possible?
>
> thanks again
> robert
>
>>
>> On Aug 23, 2009, at 4:23 PM, robert rottermann wrote:
>>
>>> Hi there,
>>>
>>> I would like to create a batching functionality for a web based
>>> aplication that
>>> uses a mysql database.
>>>
>>> mysql offeres SQL_CALC_FOUND_ROWS for this purpose.
>>> how can I use it, or is there a generic way to have sqlalchemy
>>> return the number
>>> of rows a query would have returned without limit.
>>>
>>> thanks
>>> robert
>>>
>>
>>
>>>
>>
>
>
> >
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