Hi,
it would be good if SA has similar feature to return scalar, but from
the point of view of objects - SA internally knows inheritance and
so on ... so one doesnt have to bother of exact tables, but only the
object. This can be usefull for reporting on top of SA - see for
example if you have
Michael Bayer ha scritto:
SelectResults is used for mapped classes, the columns that are to be
selected for a particular mapping are fixed. theres no reason youd
want to be able to change the column clause.
I try to do an example:
create table macrocategory ( code char(3),
Michael Bayer wrote:
FB - ??
I confirm that the kinterbasdb follows the DBAPI here, and thus its
Cursor.fetchmany() accepts an optional positional argument for the size.
ciao, lele.
--~--~-~--~~~---~--~~
You received this message because you are subscribed
Michael Bayer wrote:
FB - ??
For what is worth, it actually accepts either a single positional
argument or a `size` keyword argument.
ciao, lele.
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
sqlalchemy
Hi All,
at the end, I finally cracked the problem with the tree-structured
database with SQLAlchemy. I still have however a problem.
I am using a physical database, not an in-memory one. I have
declared my Tables as follows:
trees = Table('treenodes', metadata,
we currently have this feature:
http://www.sqlalchemy.org/docs/adv_datamapping.myt#advdatamapping_selects
which can return a result with more than one entity per row. the hard
part here is defining the select statement. SQLAlchemy doesnt know
how to compile select statements that go across
This is the db-file size, which is actual DB-implemenation detail, and
which will probably only grow up - depends on the particular db u
have. There are many strategies, like paging etc. e.g. some DBs
require a whole partition just for themselves - dont even think of
shrinking those...
See
Hi Svilen,
first of all, thank you for your answer.
On 3/8/07, svilen wrote:
This is the db-file size, which is actual DB-implemenation detail, and
which will probably only grow up - depends on the particular db u
have. There are many strategies, like paging etc. e.g. some DBs
require
Hi, I'm starting with SA so maybe I'm missing something.
I've checked the docs few times but I didn't find a solution.
I would like to have a many-to-many relation through a table.
I have Feeds they are related many-to-many with Categories and one-to-
many with FeedItems. I haven't found any
hey list -
I continue to be troubled by the slightly fragmented nature of SA's
Query object (and the cousin SelectResults). When I work with
Hibernate, I can see that their querying interface is a little more
consistent than ours. We have flags that are used for some things,
generative methods
On Mar 8, 10:57 am, Adam Hoscilo [EMAIL PROTECTED] wrote:
Hi, I'm starting with SA so maybe I'm missing something.
I've checked the docs few times but I didn't find a solution.
I would like to have a many-to-many relation through a table.
I have Feeds they are related many-to-many with
On 3/8/07, Michael Bayer [EMAIL PROTECTED] wrote:
hey list -
I continue to be troubled by the slightly fragmented nature of SA's
Query object (and the cousin SelectResults). When I work with
Hibernate, I can see that their querying interface is a little more
consistent than ours. We have
On Mar 8, 2007, at 10:08 AM, Andrea Gavana wrote:
By printing the node names, I know that bad_node is no more there, but
its data seems to still live in the database. I mean, even if I delete
*all* the items, the database size is still 180 Kb, no matter how much
I flush(), clear(), close()
On Mar 8, 2007, at 11:22 AM, Jonathan Ellis wrote:
On 3/8/07, Michael Bayer [EMAIL PROTECTED] wrote:
hey list -
I continue to be troubled by the slightly fragmented nature of SA's
Query object (and the cousin SelectResults). When I work with
Hibernate, I can see that their querying
On 3/8/07, Michael Bayer [EMAIL PROTECTED] wrote:
how often do you have a base query hanging around, vs. doing brand
new query object each time? with the full generative way, if you
are programatically building up your query, now you have to say:
if somecriterion:
q =
On Mar 8, 2007, at 11:49 AM, Jonathan Ellis wrote:
for instance, i have an application in charge of building zips for
users to download from a queue of requests. the requests are
prioritized, but to prevent starvation of low priority requests, i
have another thread that just processes them
Hi Michael,
On 3/8/07, Michael Bayer wrote:
have you verified that the tables have been deleted from ? if the
filesize doesnt shrink, that may be an artifact of sqlite's
implementation.
Thank you for your answer. Well, I can reproduce it in a small Python
script that I attach to my email. At
setting the newDataBase flag to False, heres the echo at the end:
2007-03-08 14:30:26,428 INFO sqlalchemy.engine.base.Engine.0x..50 BEGIN
2007-03-08 14:30:26,435 INFO sqlalchemy.engine.base.Engine.0x..50
DELETE FROM treenodes WHERE treenodes.node_id = ?
2007-03-08 14:30:26,441 INFO
fine, but the name get_local is not so descriptive and also attracts
the focus away from the existing identity_map accessor. how about
we jack up the identity_map dictionary to be smarter ? so you could
say:
session.identity_map.find(class_, ident, entity_name='foo')
On Mar 8, 10:07 am,
Hi Michael and All,
thank you for your detailed answer, and to have tried the demo I
have attached. I understand what you meant and you are perfectly
right, but if I can bother you with another small question:
On 3/8/07, Michael Bayer wrote:
z-eeks-Computer:~/dev/sqlalchemy classic$
This was cross posted to comp.lang.python because it would not let me
join here. At any rate, I'm using engine.func.blah(1, 2, 3,
error ).execute() and get: sqlalchemy.exceptions.SQLError:
(DatabaseError) ORA-06572: Function blah has out arguments.
Anthing special I need to do to call an Oracle
On Mar 8, 2007, at 5:14 PM, Andrea Gavana wrote:
so, its all deleted. filesize is irrelevant.
Uhm, really? What happens if Windows is saying that the filesize is 4
GB of empty things? I told you I know next to nothing about database,
but it seems a bit odd to me that the file size
Hi Michael,
On 3/8/07, Michael Bayer wrote:
but the point is, and why its irrelvant to me as the maintainer of
SQLAlchemy, is that this is totally an issue with sqlite, and has
nothing to do with SQLAlchemy. you should ask on their mailing list
about this particular behavior.
Sorry, I
we have a notion of how this feature can be implemented with oracle
but the actual work has not been performed.
i just put this notion into ticket #507 since I hadnt written it down
anywhere.
for now theres not really a good way to make it happen within SA's
querying facilities; youd have
Hi Michael and All,
On 3/8/07, Michael Bayer wrote:
but the point is, and why its irrelvant to me as the maintainer of
SQLAlchemy, is that this is totally an issue with sqlite, and has
nothing to do with SQLAlchemy. you should ask on their mailing list
about this particular behavior.
Ah, yes, I've noticed that this doesn't happen when I change this to
use Psycopg2. So, we must finally make the switch. Anyone know how to
compile Psycopg2 (with a compile flag, not by hackery) so that it does
NOT fill in the tzinfo strcuture for timestamps with timezones? We
pytz fans like our
Hi All,
I was wondering if it is possible to use zlib.compress() to
compress a cPickled object and store it into a database, and then
retrieve it using zlib.decompress(). I have tried for a while, but I
keep getting errors like:
snip
File build\bdist.win32\egg\sqlalchemy\engine\base.py,
sqlalchemy.orm.attributes.InstrumentedList
I was wondering why instrumentedList is derived from
'object' instead of 'list'?
I working with some introspection code and it fails
on attributes of type InstrumentedList because of this.
Thanks,
kris
28 matches
Mail list logo
