Ok, let me try rephrasing my question.
Is binding an engine/connection simultaneously to a Session and a Table
considered bad practice? I've looked up the documentation but not
sufficiently confident about this. There seems no definite/official answer
to this. Could some experienced users help
The order of resolution is described here:
http://docs.sqlalchemy.org/en/rel_0_9/orm/session.html#sqlalchemy.orm.session.Session.get_bind
Binds on the session take priority over binds on metadata (passing an
engine to declarative_base binds the metadata for that base class).
As far as best
Yes it is clearly documented there, I need to refine my reading skills:)
thxs Simon! Your explanation makes it much easier to understand for a
newbie like me.
On Mar 12, 2014 3:24 AM, Simon King si...@simonking.org.uk wrote:
The order of resolution is described here:
Hi guys,
I hit a problem when using sqlalchemy operating mysql.
First, let me clarify my code frames.
I have a web service to receive http requests, then, it send task to a tcp
server via zeromq pull/push mode, tcp server pull and do some push work to
cell phone.
I hit a problem that, tcp
On Mar 12, 2014, at 8:32 AM, Ni Wesley nisp...@gmail.com wrote:
Hi guys,
I hit a problem when using sqlalchemy operating mysql.
First, let me clarify my code frames.
I have a web service to receive http requests, then, it send task to a tcp
server via zeromq pull/push mode, tcp
I am sorry...
The reason why I close the session everytime is, from some googled docs,
somebody say the engine pool is full because some sessions are not closed...
I just realized that I can have a try directly use engine.execute, instead
of session...
I will look at the link you pasted later.
Hi to all,
I looked for around the web without success.
I need to reproduce this kind of SQL distinct query:
SELECT DISTINCT column1 from table where column3= 'Value'
or two or more:
SELECT DISTINCT column1,column2 from table where column3= 'Value'
I tried something like this without success:
Hi Michael,
Is there any more information about this issue? I think I may be running
into this problem, but I do not see any difference using the latest
versions of SQLAlchemy (0.8.5 and 0.9.3), the workaround does not seem to
help, and I can't find anything in the SQLAlchemy bitbucket bug
Hi Mike,
Thanks for the help.
I'm not sure that's the right set of subqueries though; looking at the
generated SQL, the result seems closer to:
CREATE TABLE #B_temp AS (SELECT * FROM B WHERE id IN (SELECT max(number)
mn FROM B GROUP BY A_id))
CREATE TABLE #C_temp AS (SELECT * FROM C WHERE
Hi Mike,
I've simplified the query I'm looking for into a one line: (not sure why I
didn't think of HAVING earlier -- definitely making a mountain from
molehills)
SELECT A.*, B1.*, C1.* FROM A LEFT OUTER JOIN (SELECT * FROM B GROUP BY
A_id HAVING number = max(number)) AS B1 ON A.id = B1.A_id
On Mar 12, 2014, at 10:36 AM, pyArchInit ArcheoImagineers
pyarchi...@gmail.com wrote:
Hi to all,
I looked for around the web without success.
I need to reproduce this kind of SQL distinct query:
SELECT DISTINCT column1 from table where column3= 'Value'
or two or more:
SELECT DISTINCT
no, you'd need to produce a standalone, reproducing test case, thanks.
On Mar 12, 2014, at 11:51 AM, Ben Boule b...@cloudlock.com wrote:
Hi Michael,
Is there any more information about this issue? I think I may be running
into this problem, but I do not see any difference using the
On Mar 12, 2014, at 2:07 PM, Michael Weylandt michael.weyla...@gmail.com
wrote:
Hi Mike,
I've simplified the query I'm looking for into a one line: (not sure why I
didn't think of HAVING earlier -- definitely making a mountain from molehills)
SELECT A.*, B1.*, C1.* FROM A LEFT OUTER
Just have a try.
Move all operations upon session directly to engine.execute.
Almost the same performance.
How to improve? :-(
在 2014年3月12日星期三UTC+8下午9时35分08秒，Michael Bayer写道：
On Mar 12, 2014, at 8:32 AM, Ni Wesley nis...@gmail.com javascript:
wrote:
Hi guys,
I hit a problem
hows your SQL debug output and your profiling going?
On Mar 12, 2014, at 9:56 PM, Ni Wesley nisp...@gmail.com wrote:
Just have a try.
Move all operations upon session directly to engine.execute.
Almost the same performance.
How to improve? :-(
在
I have not used cprofile before, but I enable engine echo and some logging,
here is output:
INFO:devsrv:httpMQ started...
DEBUG:devsrv:Got connection from ('10.0.3.96', 62560)
One device connected:('10.0.3.96', 62560)
Connection
In case of network problem.
I test in a vlan.
Here is engine ouput and my logging:
DEBUG:devsrv:Got connection from ('192.168.1.7', 63181)
One device connected:('192.168.1.7', 63181)
Connection
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