Glauco wrote:
Michael Bayer ha scritto:
On Mar 14, 2007, at 12:49 PM, Glauco wrote:
This is perfect but when i try to use count function the SQL
composer try to do an expensive sql.
In [63]: print select([tbl['azienda'].c.id], tbl['azienda']).count()
*SELECT count(id) AS
Hi.
After this thread:
http://lists.initd.org/pipermail/pysqlite/2007-March/000994.html
I think that the get_col_spec method for SLNumeric, SLString and SLChar
should add a space after the type name, since pySQLite uses the first
string for its type registry.
However I'm not sure this is a
There is some graph - represented as edges in some assoc.table, and
they having some associated item with them (e.g. weight or length).
Is it possible to calculate the overall lenght of path from node to
node (if there is a path at all) in SQL?
Finding if there is a path in the graph from
Sorry, Stephen, I replied too early; your second email arrived before the
first. A whole day before the first.
So until we get a real cleanup, you're looking to try modules in this order:
['pyodbc', 'adodbapi', 'pymssql']
Sounds OK to me -- any objections out there?
Rick
On 3/14/07, Rick
On Mar 15, 2007, at 5:09 AM, Glauco wrote:
because i expect that engine do a SELECT COUNT FROM BLABLA and no a
SELECT COUNT FROM ( SELECT BLABLA)
i think this is expensive for my DataBase.
its not. optimizers can usually figure things like that out.
I've done a lot of try this
there is a sys.exit() that I added at Grig's request at the end of
testbase.py; its testbase.py's main() method that runs the actual
tests in all cases. the result code is determined by unittest's
result.wasSuccessful(). it was working when i first implemented it,
maybe you can help
read the thread, no idea what a space has to do with anything. can
you be more specific.
On Mar 15, 2007, at 8:37 AM, Manlio Perillo wrote:
Hi.
After this thread:
http://lists.initd.org/pipermail/pysqlite/2007-March/000994.html
I think that the get_col_spec method for SLNumeric,
Hello list,
Any idea how I could generate this SQL statement under SQLAlchemy
(especially the PostreSQL ARRAY clause ...) ?
SELECT
i.id,
t.name AS taxo,
i.geographic_range,
ARRAY(
(SELECT h.name
FROM habitats h, invasive_habitats ih
WHERE
i think this kind of thing is more suited to the nested sets model
for trees. a google will show you a million hits, heres one:
http://dev.mysql.com/tech-resources/articles/hierarchical-data.html
im not a fan of nested sets because theres a huge overhead to
changing nodes (requires updates
Michael Bayer ha scritto:
read the thread, no idea what a space has to do with anything. can
you be more specific.
pySQLite read the first word of the column spec to find the converter.
Here is a full example:
import decimal
from pysqlite2 import dbapi2 as sqlite
from sqlalchemy import
i think this kind of thing is more suited to the nested sets
model for trees. a google will show you a million hits, heres one:
http://dev.mysql.com/tech-resources/articles/hierarchical-data.html
ahha. thanks.
So this is to look/represent/store different part of the thing; in my
case i need
use literal text (since its PG only anyway), or use func.ARRAY().
On Mar 15, 2007, at 11:16 AM, Julien Cigar wrote:
Hello list,
Any idea how I could generate this SQL statement under SQLAlchemy
(especially the PostreSQL ARRAY clause ...) ?
SELECT
i.id,
t.name AS taxo,
the docs say register_converter is for custom types. seems like
kind of a hack here ? why not make your own type ?
On Mar 15, 2007, at 11:22 AM, Manlio Perillo wrote:
Michael Bayer ha scritto:
read the thread, no idea what a space has to do with anything. can
you be more specific.
Hi,
I doing a msg board with nested sets as descrived on
http://dev.mysql.com/tech-resources/articles/hierarchical-data.html
I'm not sure how to do a statement like this in sqlalchemy:
SELECT node.id, node.topic, node.content
FROM nested_category AS node, nested_category AS parent
WHERE
use table.alias() for one of the roles - or for both.
Hi,
I doing a msg board with nested sets as descrived on
http://dev.mysql.com/tech-resources/articles/hierarchical-data.html
I'm not sure how to do a statement like this in sqlalchemy:
SELECT node.id, node.topic, node.content
FROM
OK this was something small, the alltests.py scripts needed to call
testbase's main() function and not its runTests() method, so that the
exit code is propigated. rev 2414.
On Mar 14, 2007, at 10:30 PM, [EMAIL PROTECTED] wrote:
Some of you may know that I run a Python buildbot for
Hi,
In my application I'm working with three different databases.
Case 1:
For 2 databases I'm using the connection object directly execute sql
and
Case 2:
In the 3rd database I'm using the statement object and then doing the
statement.execute, where the db is implicitly associated with the
Hi,
that worked great! thanks :)
- tml
On Mar 15, 9:10 am, svilen [EMAIL PROTECTED] wrote:
use table.alias() for one of the roles - or for both.
Hi,
I doing a msg board with nested sets as descrived on
http://dev.mysql.com/tech-resources/articles/hierarchical-data.html
I'm not sure
Michael Bayer ha scritto:
the docs say register_converter is for custom types. seems like
kind of a hack here ?
As I can see, it is not an hack.
why not make your own type ?
I have tried to replace 'NUMERIC' with 'DECIMAL' or 'XDECIMAL';
the result is the same: pysqlite converts the
t = metadata.engine.text(LOCK TABLE :table_name WRITE; ,
bindparams=[bindparam('table_name', type=types.String)])
will not work as the generated statement looks like:
LOCK TABLE 'my_table_name' WRITE;
Is there any other type I can specify which doesn't quote the string
for tablename? The table
Hi svilen,
thanks. I have that query working now.
On Mar 15, 9:10 am, svilen [EMAIL PROTECTED] wrote:
use table.alias() for one of the roles - or for both.
Hi,
I doing a msg board with nested sets as descrived on
http://dev.mysql.com/tech-resources/articles/hierarchical-data.html
I'm
also to clarify, the text actually has :table_name used in many other
places:
t = metadata.engine.text(LOCK TABLE :table_name WRITE;
UPDATE :table_name SET rgt=rgt + 2 WHERE
rgt :insert_node_val and parent_id = :parent_id;
UPDATE
Hi all,
I'm working with postgres and sqlalchemy, I found a strange behavior
(a bug?) of the reflection code,
take a look at this:
#
import sqlalchemy as sa
engine = sa.create_engine('postgres://xxx:[EMAIL PROTECTED]/xxx')
metadata =
tml wrote:
also to clarify, the text actually has :table_name used in many other
places:
t = metadata.engine.text(LOCK TABLE :table_name WRITE;
UPDATE :table_name SET rgt=rgt +
2 WHERE rgt :insert_node_val and parent_id = :parent_id;
On Mar 15, 2007, at 12:23 PM, Julien Cigar wrote:
it returns something like:
(u'freshwater', 33, 1983, u'Vascular plants', u'Lemna minuta',
u'Minute
duckweed')
(u'terrestial', 39, 2006, u'Vascular plants', u'Lysichiton
americanus',
u'American skunk cabbage')
(u'freshwater', 39,
On Mar 15, 2007, at 12:19 PM, vinjvinj wrote:
cases above. Ideally you would want the database layer to recreate the
connection and then try to execute the statement again.
whys that ? what if you just have the wrong connection string, or
the database is stopped ? do you expect the
postgres doesnt have a unicode column type. the Unicode SA type is a
string type with additional python-side processing of the data.
to reflect a table with some columns coming back as Unicode, see the
metadata docs on overriding columns.
also you might want to forego the Unicode type
if a space in the DDL for a create table is actually significant to
SQLite, then im not sure if i want to build that into the core.
also im not even sure what you really want, is it this?
NUMERIC (19,5)
anyway, i still dont understand why you dont make your own type. by
which I mean:
throw consistent errors at consistent points of execution. if you
think your database was stopped and is now re-started, you can call
invalidate() on an individual connection and then close() it for it
to be replaced in the pool, or more likely you can call dispose() on
your engine and it
Michael OK this was something small, the alltests.py scripts needed
Michael to call testbase's main() function and not its runTests()
Michael method, so that the exit code is propigated. rev 2414.
Excellent. Trying a test run now...
Skip
Id say you have to monkeypatch Connection._execute_raw() with a
wrapping method for now (or dialect.do_execute()/do_execute_many
()).I have observed that execute() is not the only place you
might get an exception. sometimes you get it when calling cursor()
(we do catch those and
On 3/15/07, Michael Bayer [EMAIL PROTECTED] wrote:
well at least make a full blown patch that doesnt break all the other
DB's. notice that an Engine doesnt just execute Compiled objects, it
can execute straight strings as well. thats why the dialect's
do_execute() and do_executemany() take
Hi All,
Good examples of rudimentary joins of 3 or more tables are hard to
find. Please point me to some decent examples.
Thank you,
~G~
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups
sqlalchemy group.
To post to
YES. This is good stuff.
Thanks again.
On 3/16/07, Monty Taylor [EMAIL PROTECTED] wrote:
On 3/15/07, Michael Bayer [EMAIL PROTECTED] wrote:
well at least make a full blown patch that doesnt break all the other
DB's. notice that an Engine doesnt just execute Compiled objects, it
can
a SQL statement containing joins usually has the joins in a chain:
select * from table1 JOIN table2 ON table1.somecolumn =
table2.somecolumn JOIN table3 on table2.somecolumn=table3.somecolumn ...
SQLAlchemy's join function works in a similar way. you can keep
calling join on the previous
35 matches
Mail list logo
