Additional note: The same thing happens when using Index() explicitly.
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Have you considered using a discriminator column, an additional integer that
identifies the shard and is part of a two-integer primary key?
You could then use concrete polymorphic inheritance to set up mappers for
both tables that would automatically set the discriminator column to the
On May 21, 2008, at 8:13 PM, Rick Morrison wrote:
The and_ function is expecting two arguments, not a series of
*args. It works when you remove the third argument because you then
have the expected two arguments.
and_() and or_() still take *args.
On May 21, 2008, at 7:42 PM, arashf wrote:
I'm running this query: q = Event.query.filter(and_(Event.id
id_under, Event.feed == True,
Event.ns_id.in_(ns_list))).limit(num).order_by([Event.updated.desc(),
Event.id.desc()])
For some reason, sqlalchemy decides to pull the entire table,
On May 22, 2008, at 7:10 AM, Geoff wrote:
Hi,
I have split up my database horizontally and am using UUIDs to
uniquely identify a row across databases. Using UUIDs as a primary key
is slow (InnoDB) so I wanted to use the common trick of having a INT
primary key using auto_increment on
Does SQLA have any mechanism to use FORCE INDEX?
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Nice, thanks for the tips guys!
From what I understand, MySQL has some tasty optimisations that are
used when the primary key is an int. So once it knows what primary key
it's looking for (after looking in the index), it's faster to retrieve
the row.
On May 22, 2:50 pm, Michael Bayer [EMAIL
I get the following
db = create_engine('mssql://wscmsql/ws market datasql.db')
File c:\python25\lib\site-packages\SQLAlchemy-0.4.5-py2.5.egg
\sqlalchemy\engine\__init__.py, line 160, in create_engine
return strategy.create(*args, **kwargs)
File
I get the following error. After this i tried installing pymssql which
requires a minimum of python 2.4 and all i have is python 2.3
Any way out for us python 2.3 users ?
db = create_engine('mssql://wscmsql/ws market datasql.db')
File
On May 22, 2008, at 11:25 AM, TkNeo wrote:
I get the following error. After this i tried installing pymssql which
requires a minimum of python 2.4 and all i have is python 2.3
Any way out for us python 2.3 users ?
why cant you get onto py2.5 ?
Any know why results from using from_statement do not convert strings?
It works fine when I use filter_by etc...
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assuming you're talking about inbound parameters, not result
setsuse bind parameters with from_statement, in conjunction with
query.params():
query.from_statement(text(select * from table where x
=:y)).values(y=5).all()
On May 22, 2008, at 11:57 AM, Geoff wrote:
Any know why
On May 22, 2008, at 12:03 PM, Michael Bayer wrote:
assuming you're talking about inbound parameters, not result
setsuse bind parameters with from_statement, in conjunction with
query.params():
query.from_statement(text(select * from table where x
=:y)).values(y=5).all()
sorry, i
Hello everybody,
I'm having hard time figuring out how or whether it is possible at all
to use select statement that can access record to be inserted as
column's default value.
groups = Table('groups', meta,
Column('id', Integer, primary_key=True),
Column('prefix', String(32),
On May 22, 2008, at 12:23 PM, askel wrote:
Hello everybody,
I'm having hard time figuring out how or whether it is possible at all
to use select statement that can access record to be inserted as
column's default value.
groups = Table('groups', meta,
Column('id', Integer,
manager. you know how it is...
i waste a lot of time , as you can see, because of being stuck to 2.3
and half the libraries out there are for 2.4 onwards. I think one day
they will realize this and let me upgrade.
so there is no way out for us 2.3 users...
On May 22, 10:38 am, Michael
Thank you Michael
On May 22, 12:37 pm, Michael Bayer [EMAIL PROTECTED] wrote:
On May 22, 2008, at 12:23 PM, askel wrote:
Hello everybody,
I'm having hard time figuring out how or whether it is possible at all
to use select statement that can access record to be inserted as
I implemented it the way Michael suggested. Now, I'm wondering if it
can be done as a subquery, i.e. avoiding pre-execution of select
clause. May be that is pretty much SQL engine specific but so are
sequences and foreign keys. Resulting query built by compiler should
be like the following:
hi
object A has 2 columns, x and y. From all the A instances, for each distinct
x, i want to get the instance that has maximum y.
(it's a temporal query, x is obj_id, y is time - yielding the latest version
of all the objects)
so far i invented this sql:
select a.* from
a,
Howdy,
I've got this SQL query:
select *
from
( select a1.domain_id as domain_id_1, u1.eid as eid, u1.uname as
uname,
u1.uid as uid, a1.gcos, a1.home, a1.shell
from nis_accounts a1 inner join nis_users u1 on (a1.nis_user_id =
u1.id)
where u1.eid != ''
) ndu1
inner join
( select
On May 22, 2008, at 5:51 PM, Jeff Putsch wrote:
Which can give me two selects using aliases:
a1 = s.correlate(None).alias()
a2 = s.correlate(None).alias()
But every attempt at using a1 and a2 in a select with a join is
failing for me.
a1.join(a2, onclause) should do it. if not, supply
I have the following setup:
(relevant excerpts only)
contacts = Table('contacts', meta,
Column('id', Integer, primary_key=True),
Column('display_as', String(75)),
Column('title', String(5)),
Column('first_name', String(25)),
Column('middle_name', String(25)),
On May 22, 2008, at 6:10 PM, kremlan wrote:
I have the following setup:
(relevant excerpts only)
contacts = Table('contacts', meta,
Column('id', Integer, primary_key=True),
Column('display_as', String(75)),
Column('title', String(5)),
Column('first_name', String(25)),
On May 22, 2008, at 3:08 PM, Michael Bayer wrote:
a1.join(a2, onclause) should do it. if not, supply a full test case
and a description of the specific problem.
OK, I guess. So how do I see the SQL that gets generated?
I've tried this:
print select(from_obj=[a1.join(a2), a1.c.eid ==
Worked like a charm. Thank you for such a prompt reply and for the
project in general.
-brad
On May 22, 6:36 pm, Michael Bayer [EMAIL PROTECTED] wrote:
On May 22, 2008, at 6:10 PM, kremlan wrote:
I have the following setup:
(relevant excerpts only)
contacts = Table('contacts',
I apologize for this second, longer, more detailed, post, but I
thought my first response
to the request for more descriptions was incomplete...
On May 22, 3:08 pm, Michael Bayer [EMAIL PROTECTED] wrote:
a1.join(a2, onclause) should do it. if not, supply a full test case
and a description
label() is quoting isnull because isnull is listed as a reserved
word. literal_column(isnull) is not, because literal_column does
exactly what you say.
So id try first not using the word isnull for the label. After
that, its possible that SQlite isnt going to let you allow ordering by
1 - changing isnull to foo worked. thanks!
2 - i tried adding text('nulls last') in the order_by(...), but got an
error from sqlite. i don't suppose there's something clever in
sqlalchemy that does this in a portable way is there?
3 - what do you use as a reference for SQL? do you have the
the case solution works too, which is what i'll go with. thanks.
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I'm brand new to SA, and trying to import data from a text file by
directly executing postgresql's COPY statement. It works fine in the
postgresql client (psql), but when I run the same statements through
SA I get an empty table. This is a snip of the python code:
dbengine =
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