That would certainly work. :) Would that offer any benefits over
pyodbc, since I wouldn't have the mapping (which was taking all the
time I was spending with SA)?
On 3/25/16, Mike Bayer wrote:
>
>
> On 03/25/2016 05:20 PM, Alex Hall wrote:
>> Hi all,
>> Since SA was
> (ideally in an in-memory sqlite db), then use automap to map classes to
> those tables.
>
> Simon
>
> On Mon, Mar 21, 2016 at 3:12 PM, Alex Hall wrote:
>
>> Wow, thanks guys, especially for the sample code! I'm trying to use
>> the example (and f
e if you want,
but it's pretty long.
On 3/17/16, Mike Bayer wrote:
>
>
> On 03/17/2016 03:11 PM, Alex Hall wrote:
>> Hello all,
>> It seems like I can't go a day without running into some kind of wall.
>> This one is a conceptual one regarding foreign keys. I
That would be the simplest. Having something so inefficient just bugs me. :)
I'm using MSSQL, so limit() works. Would yield_per() help here, or is
that for something different? Even if it didn't help local memory, but
just kept the load on the DB server down, that would be good.
On 3/16/16, Chris
Hello all,
I'm running a different query than yesterday. Before, I had something like:
items = session.query(itemTable, attachmentTable, attachmentTextTable,
assignmentTable, attributeTable, attributeValueTable,
attributeValueAssignmentTable, vendorTable)\
.filter(attachmentTable.itm_id == itemTab
Hello all,
It seems like I can't go a day without running into some kind of wall.
This one is a conceptual one regarding foreign keys. I have to somehow
get the same FK column in table A pointing to IDs in tables B and C.
At one person's suggestion, I'm making classes for my tables, even
though I'
at 1:07 PM, Alex Hall wrote:
>
>> Hello all,
>> I'm running a different query than yesterday. Before, I had something
>> like:
>>
>> items = session.query(itemTable, attachmentTable, attachmentTextTable,
>> assignmentTable, attributeTable, attributeValue
> On Mar 16, 2016, at 03:23, Jonathan Vanasco wrote:
>
> The database design you have is less than perfect.
I didn't make it, I came in long after it had been set up and now have to work
with it. I can't re-do anything. They did it this way so that, for instance, a
single attribute or attachm
Thanks guys. I'm using automap, but I'm not completely sure how much
that gives me for free. Yes, these tables are big, and the resulting
set would be worrying large (potentially 5*20, and that's without
the attributes and attachments, plus their assignment and values
tables). I've switched to
Hi all,
I need to pull data from a bunch of tables, and I *think* outer joins
are the way to do it. However, I can't find much on SA's support for
outer joins.
What I'm trying to do is pull all items from the Items table, as well
as associated attachments and attributes if an item is tied to eithe
Thanks for the clarification. I'm suddenly getting no results at all
when I add this filter, but at least now I know I'm doing the syntax
right. Never a dull moment. :)
On 3/14/16, Jonathan Vanasco wrote:
>
>>
>> .filter(t1.c1=='hello', and_(t3.c1=='world'))
>>
>
> The and_ Is wrong in this conte
'))
I may have that and_ part wrong, but filter is the obvious solution to
most of my question.
On 3/14/16, Alex Hall wrote:
> Hi all,
> I had a link that was a great intro to querying, but of course, I
> can't find it now. I need to add a couple conditions to my query. In
> S
Hi all,
I had a link that was a great intro to querying, but of course, I
can't find it now. I need to add a couple conditions to my query. In
SQL, it might look like this:
select *
from t1 join t2 on t1.c1==t2.c1
join t3 on t3.c1==t1.c1
where t1.c1 = 'hello' and t3.c3 = 'world'
The joins I have
map import automap_base
> from sqlalchemy import MetaData, Column, String
> from sqlalchemy.orm import Session
>
> metadata = MetaData()
>
> desiredTables = ["sometable", "someothertable", "VENDR"]
> base = automap_base(metadata=metadata)
>
>
__table_args__ = {"extend_existing": True}
>
> that tells reflection to add new data to this Table object even though
> it already exists.
>
>
> On 03/14/2016 09:24 AM, Alex Hall wrote:
>> Thanks for that. Somehow, I'm getting the same error as before--the
>&g
e) - the
> "id" / "Integer" combination above is just an example.
>
> Then do the automap as you've done. At the end, if it worked,
> Base.classes.VENDR should be the same class as the VENDR class above.
>
>
> On 03/11/2016 05:09 PM, Alex Hall wrote:
&g
table. If I could, I'd just add a PK column to the table
itself. Sadly, I can't change that kind of thing, only query it.
On 3/11/16, Mike Bayer wrote:
> just make the class and include the PK column, then automap. the rest
> of the columns should be filled in.
>
>
> On 0
of subclassing, since the PK is now set. However, I don't
know if this would still work with automapping.
On 3/11/16, Mike Bayer wrote:
> ah. does VENDR have a primary key? it won't be mapped if not.
>
> what's in base.classes.keys() ? base.classes['VENDR'
elp at all? This is
the only table in the CMS to have a name in all caps, but I need to
access it to look up manufacturer details for items.
On 3/11/16, Mike Bayer wrote:
>
> can you look in metadata.tables to see what it actually reflected ?
>
>
>
>
>
>
> On 03/11/2016
That's weird: the name I see is exactly what I've been using, "VENDR".
All caps and everything. I tried using lowercase, just to see what it
would do, but it failed.
On 3/11/16, Mike Bayer wrote:
>
>
> On 03/11/2016 09:39 AM, Alex Hall wrote:
>> Hello list,
>
Hello list,
Finally, a pure SA question from me. I'm using Automap and the "only"
keyword to automap a subset of the tables in our CMS database. This
has worked perfectly thus far. Now, though, it's failing on a specific
table, and the only difference I can see is that this table's name is
in all c
What I'm doing, and sorry for not explaining further, is making a CSV
file of data. Each row is a row in my results, or would be if I were
just selecting from products. Having to select from attributes as well
is where I'm having problems. Each product can have multiple
attributes, and each attribu
Hi list,
I'm not sure how to explain this, so let me know if I lose you. I have
the same products database as yesterday, but I've just learned that
product attributes are stored in their own tables. A product can have
many attributes (size, color, weight, etc), and each attribute value
is in a tabl
ut. Thanks.
On 3/9/16, Alex Hall wrote:
> Hi all,
> Just a quick question: what does SA do if names overlap? For example,
> in assignmentTable, there's a column called itm_id. In
> attachmentTable, there's also a column called itm_id, and there's one
> in itemTable
ould be duplicated. At least I learned something from all
this. Thanks again for the help, guys.
On 3/9/16, Jonathan Vanasco wrote:
>
> On Wednesday, March 9, 2016 at 3:02:05 PM UTC-5, Alex Hall wrote:
>>
>> Fair enough, thanks. I didn't realize it was such a complex
Hi all,
Just a quick question: what does SA do if names overlap? For example,
in assignmentTable, there's a column called itm_id. In
attachmentTable, there's also a column called itm_id, and there's one
in itemTable as well. If I combine these in a kind of join, as in:
results = session.query(assi
Fair enough, thanks. I didn't realize it was such a complex task; I
figured it was just a matter of passing an argument to distinct() or
something equally easy. Speed isn't a huge concern, so I suppose I
could get around this by storing the item numbers I find and then
checking that the row I'm abo
Hi all,
I want to select * from a table, getting all columns. However, the
only rows I want are where the item number is distinct. I've got:
items = session.query(itemTable)\
.distinct()\
.limit(10)
But that doesn't apply "distinct" to just item_number. I'm not the
best with SQL in general or I'd e
setting a "dbms_ver" attribute on the
> pyodbc connection that you are creating in your custom creator function.
> This is where it gets used:
>
> https://github.com/ibmdb/python-ibmdbsa/blob/master/ibm_db_sa/ibm_db_sa/base.py#L481
>
> Simon
>
> On Fri, Feb
quot;db2+pyodbc://". Does that make any difference?
>
> On Fri, Feb 19, 2016 at 4:20 PM, Alex Hall wrote:
>
>> Thanks. I tried both, and triedother variations including or excluding
>> the module name as a prefix (ibm_db_sa.db2.pyodbc://). In most cases,
>> I get:
>
ibmdbsa/blob/master/ibm_db_sa/setup.py
>
> I would guess that you want to end up with the DB2Dialect_pyodbc class,
> which means you should use db2.pyodbc:// or ibm_db_sa.pyodbc://
>
> Simon
>
>
> On Fri, Feb 19, 2016 at 3:33 PM, Alex Hall wrote:
>
>> Thanks, that look
7;m
getting nightmarish flashbacks to my "has no attribute" error last
week for the same object. But at least this is a different one; I'll
count it as a good thing!
On 2/19/16, Simon King wrote:
> On Fri, Feb 19, 2016 at 2:38 PM, Alex Hall wrote:
>
>> As the subject s
As the subject says, I am connected to our iSeries through straight
pyodbc. That seems to run perfectly. Now, is there a way to use SA
with that connection? When I use "ibm_db_sa+pyodbc://..." I get the
exact same error I was getting when using ibm_db directly. Using
pyodbc, I can specify the drive
2/17/16, Michal Petrucha wrote:
> On Tue, Feb 16, 2016 at 04:02:08PM -0500, Alex Hall wrote:
>> Great; I was hoping you wouldn't say that. :) I've been through them
>> many, many times, trying to get the connection working. I've gone from
>> error to error, and thoug
it? Will mapping all
that fill up my ram, or have any other impact I should consider?
On 2/16/16, Mike Bayer wrote:
> well then you're just not making any database connection. you'd need
> to check your database connectivity and your connection parameters.
>
>
>
> On
connection, and sure enough,
it hangs on that line.
On 2/16/16, Mike Bayer wrote:
> turning on echo=True inside create_engine() will show you what queries
> are emitted as they occur so you can see which ones are taking long
> and/or hanging.
>
>
> On 02/16/2016 02:59 PM, Alex Ha
, the connection starts up and the script hangs. I'm
no closer to solving this, and would love to hear anyone's thoughts,
but at least I know that my thought of blaming reflect/automap is
likely incorrect.
On 2/16/16, Alex Hall wrote:
> Hi list,
> Sorry for all the emails. I've
Hi list,
Sorry for all the emails. I've determined that my script is actually
connecting to the 400's test database. At least, a print statement
placed just after the create_engine call is printing, so I guess we're
good there.
What I'm running into now is unresponsiveness when I try to reflect or
database, rather than still
knocking on its door.
On 2/16/16, Michal Petrucha wrote:
> On Tue, Feb 16, 2016 at 10:27:40AM -0500, Alex Hall wrote:
>> I have pyodbc 3.0.10, ibm_db_sa 0.3.2, and ibm_db 2.0.6. I'm also
>> talking to people on the ibm_db list, and they suggested I
ou are seeing, if the object in “connection.connection” is a
> pyodbc.Connection and doesn’t have a “dbms_ver” attribute.
>
> Note that there are at least 3 packages that could be involved here:
>
> pyodbc (https://pypi.python.org/pypi/pyodbc)
>
> ibm_db (https://pypi.python.org/pypi/i
sure what I can do about it, it looks like this dbms_ver
property is definitely in the latest ibm_db_sa version. Am I getting
this from the wrong place, or confusing this with a different package
somehow? I *must* be missing something obvious.
On 2/15/16, Alex Hall wrote:
> An interesting develo
track with this?
On 2/15/16, Alex Hall wrote:
> Thanks guys. I've checked the version I'm using, and it reports that
> ibm_db_sa.__version__ is '0.3.2'. I have both ibm_db_sa and ibm_db
> installed. Should I remove ibm_db and rely only on ibm_db_sa instead?
> Is the fo
zle wrote:
> Try to use ibm_db_sa 0.3.2 instead, apparently you are using the previous
> version. dbms_ver is a feature specific of native ibm_db version of which
> not available in pyodbc.
>
> https://pypi.python.org/pypi/ibm_db_sa/0.3.2
>
>
> Salam,
>
> -Jaim
Hello list,
I've configured a DSN to a test version of my work's AS400 and I seem
to be able to connect just fine (Yes!) I'm now running into a problem
when I try to ask for a list of all tables. The line is:
dbInspector = inspect(dbEngine)
The traceback is very long, and I can paste it if you w
2/12/16, Michal Petrucha wrote:
> On Thu, Feb 11, 2016 at 01:16:03PM -0500, Alex Hall wrote:
>> I've done more research on this topic. There's a lot out there about
>> using MSSQL with SA, but next to nothing about using ibm_db_sa or
>> specifying drivers.
>>
>
keep bugging the list about this. I
just have no other options at the moment and I need to get this
working soon.
On 2/11/16, Alex Hall wrote:
> I think I'm confused. Isn't Pyodbc an alternative to SQLAlchemy? If
> not, how would the two work together? I just looked through the
>
on't have db2 connect installed on your
> machine.
>
> Salam,
>
> -Jaimy
> On Feb 11, 2016 01:50, "Alex Hall" wrote:
>
>> Hello list,
>> I sent this to the ibm_db list yesterday, but no one has responded
>> yet. Since it's as much ibm_db as SA,
Hello list,
I sent this to the ibm_db list yesterday, but no one has responded
yet. Since it's as much ibm_db as SA, I thought I'd try here as well
in case any of you have used an AS400 before. I have ibm_db,
ibm_db_sa, the latest sqlalchemy, and Python 2.7 (latest) installed. I
can talk to SQLite
Hi list,
Thus far, I've been using very basic database actions on a local
SQLite database as I've written the application. Now, though, I have
my GUI able to drive all CRUD operations, and I'm nearing the time
when I'll switch over to the actual system for which I've written the
app: the company's
gards,
> Thierry
>
>
> 2016-02-06 5:16 GMT+01:00 Alex Hall :
>
>> Hello all,
>> Another basic question: given an instance of a record, can I somehow
>> delete the record from a table? The longer story is this.
>>
>> I have my app, which lists tables on the
se--it's been a long day. Thanks!
--
Alex Hall
Automatic Distributors, IT Department
ah...@autodist.com
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Hi all,
What's the recommended way to restrict input? For instance, I store a
phone number as an integer, and I need it to have 7, 10, or 11 digits.
In its getter, I format it so it looks good as a string, and in its
setter, I take the string the user inputs, strip only the integers,
and store thos
he help. I assumed subclasses of
base would be iterable so one could iterate over individual rows, but now I
know they aren't, it'll be easy enough to add that in the future as I get more
complex tables.
> On Feb 4, 2016, at 18:51, Simon King wrote:
>
>
>> On 4 F
Hello all,
I'm setting my application up the way Simon suggested. I still use the
table object so I can get its name for displaying in one list, but the
other list (which holds the actual rows of the selected table) is
using the relevant subclass of base.
I use wx.ListCtrl to display everything, a
ry(someTable) returns glorified tuples that can't be updated
> session.query(someMappedClass) returns instances of someMappedClass, that
> *can* be updated.
>
> Hope that makes sense,
>
> Simon
>
> On Thu, Feb 4, 2016 at 2:07 PM, Alex Hall wrote:
>
>> This is
ion which returns all mapped classes, something like this:
>
> def getAllClasses():
> return base.__subclasses__()
>
> (If your class hierarchy is more complicated you'd need a more
> sophisticated function there)
>
> Simon
>
> On Thu, Feb 4, 2016 at 12:32 PM, Ale
data.create_all(myEngine) #should create the
empty tables, right?
#main.py
from DBDefinitions import *
import DBInterface
c1 = Customer(...)
c2 = Customer(...)
mt1 = MyOtherTable(...)
if DBInterface.session.query(DBDefinitions.Customer).count == 0:
DBInterface.session.add_all([c1, c2])
On 2/4/16, A
well as? Where are you getting the
> object that you are putting in the first element of each of the
> self.choices list?
>
> Simon
>
> On Thu, Feb 4, 2016 at 11:34 AM, Alex Hall wrote:
>
>> It's all from a GUI, so it's something like this (my code isn't in fro
tomer.id, Customer.name, …)” instead.
>
> Simon
>
>> On 3 Feb 2016, at 17:43, Alex Hall wrote:
>>
>> I'm on the Gmail site, so am not sure I can reply in-line. Sorry.
>>
>> This is a basic table class, like
>> class Customer(base):
>> __tabl
ll+dbte...@autodist.com', True)
On 2/3/16, Simon King wrote:
> On Wed, Feb 3, 2016 at 3:54 PM, Alex Hall wrote:
>
>> Hello list,
>> I'm new to SQLAlchemy, but not to Python. I have an application that's
>> coming together, and relies on SQLAlchemy to talk to a
Hello list,
I'm new to SQLAlchemy, but not to Python. I have an application that's
coming together, and relies on SQLAlchemy to talk to a database for
many of the app's functions. Listing tables, listing records, updating
records, pulling records for internal use, and so on.
My app is working, but
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