On Aug 18, 2010, at 4:16 PM, Michael Hipp wrote:
> The little diddly below is comparing performance of orm access vs sql
> expression language.
>
> When I run it with number=1 I get a 5.8x advantage for sql. When I run it 10
> times I get a 2.7x advantage. The actual numbers are, respectively:
On Aug 18, 2010, at 12:29 PM, Oliver Beattie wrote:
> On Aug 18, 3:39 pm, Michael Bayer wrote:
>> Sent from my iPhone
>>
>> On Aug 18, 2010, at 8:27 AM, Oliver Beattie wrote:
>>
>>
>>
>>
>>
>>> I'm not entirely sure why this is happening… it seems to work for me
>>> in nearly all other ci
Hello Michael,
2010/8/18 Michael Hipp :
>
> Is this a typical/expected difference in performance between the two query
> methods?
>
Yes. This is expected. When you use the ORM, SQLAlchemy has to
instantiate Python objects and populate each property from the result
set (and maybe more objects fr
I should have added that this is running across a 100M LAN to an Ubuntu server
running PostgreSQL 8.4.4. The client is a Win7 system on Python 2.6.5. SA is
version 0.6.3.
Michael
On 8/18/2010 3:16 PM, Michael Hipp wrote:
The little diddly below is comparing performance of orm access vs sql
e
The little diddly below is comparing performance of orm access vs sql
expression language.
When I run it with number=1 I get a 5.8x advantage for sql. When I run it 10
times I get a 2.7x advantage. The actual numbers are, respectively:
1.47375132
0.25630808
5.45569524
1.96911144
Is this a t
I start to understand how the mapper works, so I can refine my example
(everything is fictional, just a textbook example)
Let's say I moreover want to manage playlists with in a table as such
as
PLAYLIST_TABLE ( playlist_ident * , track_ident )
now, in fact, I don't need to store any information
SQLAlchemy seems pretty smart about updating only the changed columns in an orm
object...
If I have an orm object. Something changes one of the columns. Just before I
commit() the session, is there a way to tell which columns will be updated vs
those that are unchanged?
Any way to ascertain
On Aug 18, 3:39 pm, Michael Bayer wrote:
> Sent from my iPhone
>
> On Aug 18, 2010, at 8:27 AM, Oliver Beattie wrote:
>
>
>
>
>
> > I'm not entirely sure why this is happening… it seems to work for me
> > in nearly all other circumstances so I'm a bit stumped. Basically, I
> > have a declarative
On 08/18/2010 10:27 AM, Alvaro Reinoso wrote:
> Hello,
>
> I'd like to query the database and get read-only objects with session
> object. I need to save the objects in my server and use them through
> the user session. If I use a object outside of the function that calls
> the database, I get this
Hi All,
Does anyone have any good examples of migration scripts?
The documentation is surprisingly sparse..
Of course, an alernative which doesn't do any abusive monkey patching or
have any annoying * imports would be handy. Michael, how's Alembic coming?
Chris
--
You received this message b
Hello,
I'd like to query the database and get read-only objects with session
object. I need to save the objects in my server and use them through
the user session. If I use a object outside of the function that calls
the database, I get this error:
"DetachedInstanceError: Parent instance is not b
Thank you very much for the source,
I also learned the term of vertical paradigm and stumble upon the
dictlike.py example in the sqlalchemy source ...
even if yours remains simpler
On Aug 18, 5:05 pm, Conor wrote:
> On 08/17/2010 11:32 AM, yota wrote:
>
>
>
> > Hello,
>
> > sqlalchemy seems to
On 08/17/2010 11:32 AM, yota wrote:
> Hello,
>
> sqlalchemy seems to be the proper tool for my needs but I can't figure
> out how to design my project or set the ORM properly.
>
> Let's say, I build a music database, storing tracks and their
> associated metadata in an sql-like database defined as
Ah. Then the problem is in turbogears (which creates a default .ini
file with):
#echo shouldn't be used together with the logging module.
sqlalchemy.echo = false
sqlalchemy.echo_pool = false
sqlalchemy.pool_recycle = 3600
...logging sections...
===
On Aug 17, 2010, at 5:05 PM, flzz wrote:
> Thanks this did the trick, I agree, an option in relationship to
> define how this behaves would be nice.
its a long term TODO.
>
> Cheers
> Etrik
>
> On Aug 17, 3:27 pm, Conor wrote:
>> On 08/17/2010 11:21 AM, flzz wrote:
>>
>>
>>
>>
>>
>>
On Aug 17, 2010, at 11:45 AM, Kent wrote:
> The logging FAQ states "Therefore, when using Python logging, ensure
> all echo flags are set to False at all times, to avoid getting
> duplicate log lines."
> http://www.sqlalchemy.org/docs/dbengine.html#configuring-logging
>
> Is this no longer corre
Sent from my iPhone
On Aug 18, 2010, at 8:27 AM, Oliver Beattie wrote:
> I'm not entirely sure why this is happening… it seems to work for me
> in nearly all other circumstances so I'm a bit stumped. Basically, I
> have a declarative table which has a character field as its primary
> key (it's
On Tue, Aug 17, 2010 at 07:32:41PM -0700, Enrico wrote:
> Micahael gave me this advice:
> http://groups.google.com/group/sqlalchemy/browse_thread/thread/df6e451855d13a60/386232232434ff92?lnk=gst&q=enrico#386232232434ff92
> in which there are two backrefs and I think it's declarative whereas
> yours
Hello,
sqlalchemy seems to be the proper tool for my needs but I can't figure
out how to design my project or set the ORM properly.
Let's say, I build a music database, storing tracks and their
associated metadata in an sql-like database defined as such :
TRACK_TABLE ( ident *, url , duration )
Thanks a lot Lance, that did the trick.
best regards,
jeroen
On Mon, Aug 16, 2010 at 10:18 PM, Lance Edgar wrote:
> See
> http://groups.google.com/group/sqlalchemy/browse_thread/thread/aa9c753384532e6c/8d070ff7208494b1
>
> The solution though I believe is just:
>
> from sqlalchemy import create_
Thanks! Will try to get this working.
I am using GeoAlchemy quite extensively but these more obscure
functions and types are not supported...
On Aug 16, 9:14 pm, Michael Bayer wrote:
> On Aug 16, 2010, at 11:21 AM, bekozi wrote:
>
> > Is it possible to work with set-returning functions in SQLAlc
I'm using Postgres
On Aug 18, 1:27 pm, Oliver Beattie wrote:
> I'm not entirely sure why this is happening… it seems to work for me
> in nearly all other circumstances so I'm a bit stumped. Basically, I
> have a declarative table which has a character field as its primary
> key (it's not an ID wh
I'm not entirely sure why this is happening… it seems to work for me
in nearly all other circumstances so I'm a bit stumped. Basically, I
have a declarative table which has a character field as its primary
key (it's not an ID which can be returned by the server), yet
SQLAlchemy is issuing an INSERT
I'm using Postgres, by the way.
On Aug 18, 1:27 pm, Oliver Beattie wrote:
> I'm not entirely sure why this is happening… it seems to work for me
> in nearly all other circumstances so I'm a bit stumped. Basically, I
> have a declarative table which has a character field as its primary
> key (it's
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