Hi!
I have a problem with constructing a custom SQL statement.
I would like to create the following SQL
DATA_SUB( somefixed-date, INTERVAL column-expression MONTHS)
I tried the following approach:
-
sqlalchemy.func.DATE_SUB(startDate,sqlalchemy.literal_column(INTERVAL
%s MONTHS %
Hi All,
I'm building a tool to extract info from databases. The
user/programmer doesn't have any advance knowledge of the structure of
the database before they load it, and i want to dynamically generate
mapped classes for the database.
i just want to check there isn't some helpful sqlalchemy
On Jun 3, 2010, at 5:06 AM, Jan-Eric wrote:
Hi!
I have a problem with constructing a custom SQL statement.
I would like to create the following SQL
DATA_SUB( somefixed-date, INTERVAL column-expression MONTHS)
I tried the following approach:
-
On Jun 2, 2010, at 5:02 PM, Nick Retallack wrote:
I have a lot of questions, so bear with me. I've been having some
doubts about whether I'm really using sqlalchemy in a good way.
--
Is there any use case for having more than one session active in the
same thread?
yes, if you wanted
-Original Message-
From: sqlalchemy@googlegroups.com
[mailto:sqlalch...@googlegroups.com] On Behalf Of Harry Percival
Sent: 03 June 2010 16:24
To: sqlalchemy@googlegroups.com
Subject: [sqlalchemy] reflecting existing databases with no a
priori knowledge of their structure
Hi
On Jun 3, 2010, at 11:24 AM, Harry Percival wrote:
Hi All,
I'm building a tool to extract info from databases. The
user/programmer doesn't have any advance knowledge of the structure of
the database before they load it, and i want to dynamically generate
mapped classes for the database.
On Jun 3, 2010, at 1:24 AM, Az wrote:
+++ Questions +++
1. Is this the correct way to use sessions or am I sort of abusing
them?
I dont see any poor patterns of use above.
2. When should I close a session?
when you no longer need the usage of any of the objects associated with it, or
Hi,
According to sqlalchemy/dialects/mysql/base.py, MySQL v3.23 should be
supported in some form. However, with SA 0.6.1 and MySQL 3.23.58, I get
the following error:
import sqlalchemy as sa
e = sa.create_engine('mysql://user:passw...@host')
e.execute('select Hello World')
Traceback (most
Owning session has been closed? Can I still use deepcopy if the
session has not been closed? How can I stop it from closing the
sessions? The problem is that if I change my shallow copied
dictionary, the objects are changed.
Basically, I'm trying to do this state change thing where I'll take a
On Jun 3, 2010, at 1:15 PM, King Simon-NFHD78 wrote:
Hi,
According to sqlalchemy/dialects/mysql/base.py, MySQL v3.23 should be
supported in some form. However, with SA 0.6.1 and MySQL 3.23.58, I get
the following error:
raise errorclass, errorvalue
On Jun 3, 2010, at 1:58 PM, Az wrote:
Owning session has been closed? Can I still use deepcopy if the
session has not been closed?
deepcopy has issues because SQLAlchemy places extra information on your
objects, i.e. an _sa_instance_state attribute, that you dont want in your copy.
You
I think I get what you mean. In the mean time, another error popped
up:
Traceback (most recent call last):
File Main.py, line 32, in module
MCS.addToTable()
File XXX/MonteCarloSimulation.py, line 138, in addToTable
### --- This function is described in the first post
On Jun 3, 8:53 am, Michael Bayer mike...@zzzcomputing.com wrote:
Is it a common practice to pass the current session into the
constructor of an ORM model?
no. The session consumes your objects, not the other way around. An object
can always get its current session via
Pretend I bound that metadata and session to an engine at some
point...
On Jun 3, 12:59 pm, Nick Retallack nickretall...@gmail.com wrote:
On Jun 3, 8:53 am, Michael Bayer mike...@zzzcomputing.com wrote:
Is it a common practice to pass the current session into the
constructor of an ORM
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