Hi,
I created ORM classes and can't find out a way to make an
UniqueConstraint for two columns. Do we have an example elsewhere?
When I used UniqueConstraint from sqlachemy.schema inside of ORM class
it does nothing, so it's not defined in a table. In particular here is
my class
class
Great, I was just wondering. But glad to see confirmation. Yes we do
have a use case when the same tablenames cause weird behavior in
ORACLE. Below is a message from our DBA in response to hick-up when we
occasionally got:
ORA-00942: table or view does not exist error.
Valentin.
Ok, here is an example in ORACLE.
Table schema (for simplicity I removed unnecessary columns):
CREATE TABLE Block
(
IDinteger,
Name varchar(500) unique not null,
Path varchar(500) not null,
primary key(ID)
);
So
Yes this works too. So you'll accept/fix the bug :)?
Thanks a lot
Valentin.
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Hi,
I just noticed that both 0.3.x and 0.4.x versions of SQLAlchemy print
compiled query for MySQL without binded parameters, so typical
printout for MySQL looks like
SELECT DISTINCT block.`Path` AS `block_Path` FROM tier0.block WHERE
block.`Path` LIKE %s
while doing the same with ORACLE
Hi,
is there any way to ask select object what is suppose to select? There
is a method locate_all_froms which return FROM part of select, but I'm
interesting in select part of SQL statement.
So, something like:
s = select([table1.c.a,table2.c.b])
listOfSelectedColumns =
has a dictionary interface.
On May 21, 2008, at 12:01 PM, vkuznet wrote:
Hi,
is there any way to ask select object what is suppose to select? There
is a method locate_all_froms which return FROM part of select, but I'm
interesting in select part of SQL statement.
So, something like
Hi,
I've been trying to profile why loading a single table from remote
ORACLE DB takes more then 5 seconds.
Here is some numbers:
create engine 0.0740728378296
engine.connect 2.05604815483
SELECT table_name FROM all_tables WHERE owner='ZZZ'
get tables 0.18466091156
Loading
grained to indicate where the
time is being spent, and if it were within SA reflection code then
these kinds of speed issues would be apparent across all dialects.
Can you post some profile results for your tests ?
On Aug 27, 2008, at 3:57 PM, vkuznet wrote:
Hi,
I've been trying
, Michael Bayer [EMAIL PROTECTED] wrote:
select([x.c.col1, y.c.col2, z.c.col3, ...],
from_obj=[x.join(y).join(z).join(q)...])
On Feb 5, 2:27 pm, vkuznet [EMAIL PROTECTED] wrote:
Hi,
I've trying to solve the following problem. I've given a list of
tables and list of columns to look at.
All
Hi,
I'm trying to develop a cross-DB application which works with ORACLE
and MySQL back-ends.
Both DBs has the same schema, but of course there is a caveat. ORACLE
has Tables and Columns in upper case and MySQL does not. That leads to
the following problem. When I construct
select(table.c.column)
Hi,
a very simple question which I cannot find in documentation. How to
get column names together with result. This is useful for web
presentation of results using templates. I used use_labels=True,
indeed it construct query with names, but my final result contains
only column values. What I
Hi,
I just came across Documentation and it's not clear to me how to use
connection pooling.
When invoked
db=create_engine()
the pool parameter is set to None by default, right?
In Connection pooling section of docs, it's said
For most cases, explicit access to the pool module is not required
Hi,
it's not obvious, nothing said in a docs about default pool setup and
The Database options section has:
pool=None - an actual pool instance.
that's why I conclude that pool is NOT setup by default. I just want
to confirm that.
Valentin.
On Mar 14, 1:34 pm, Sébastien LELONG [EMAIL PROTECTED]
Hi,
I have a dump question about naming conventions for foreign keys.
Using ORACLE as back-end all table names are in capital letters. So
Table object looks like:
Table('BRANCH',DynamicMetaData(),Column('id',OracleInteger(),primary_key=True,nullable=False),
Hi,
I've used slightly different approach:
sel=SELECT table_name FROM all_tables WHERE owner='XXX' #
ORACLE
sel=show tables # MySQL
sel=SELECT name FROM SQLITE_MASTER WHERE type='table' # SQLite
con=dbengine.connect()
metadata=DynamicMetaData()
tList = con.execute(sel)
Thanks,
it works.
On Mar 23, 10:56 am, Michael Bayer [EMAIL PROTECTED] wrote:
dont stick foo.bar in your table name. use the schema=DBNAME
parameter on your Table.
On Mar 23, 2007, at 9:41 AM, vkuznet wrote:
Hi,
I've got a new DB to handle and the account is setup in a way that I
Hi,
is there are any way to add additional joins to a given select object?
My problem is the following, I need to join the same table multiple
times. How many times I don't know in advance and in addition I need
to apply where clause while adding this join.
Thanks,
Valentin.
Hi,
I found that if I do
select([func.count(table.c.column)],distinct=True).execute()
the resulting query is
select distinct count(column) from table
but it's not what I wanted. If my column has duplicates you got
counting them, rather then count unique names. The proper SQL query
would be
Hi,
I added to my query the limit and offset (using ORACLE). To my
surprise results ARE varying if I'll print my select or not before
executing query. What I mean is the following
sel = select ()
#print sel
sel.execute()
so, if I will not print my select, I'll get *smaller* number of
), 'name)': (NullTypeEngine(),
0)}, 'columns': {'name':
Column('name',OracleString(length=500),nullable=False)}}
Any ideas, what's wrong?
Valentin.
On Apr 14, 5:25 pm, Michael Bayer [EMAIL PROTECTED] wrote:
On Apr 14, 2007, at 3:14 PM, vkuznet wrote:
Hi,
I'm trying to debug what's going
Sorry for spam,
it's a bug in my program.
Thanks for your support and prompt responses.
Valentin.
On Apr 14, 8:46 pm, vkuznet [EMAIL PROTECTED] wrote:
Thank you Mike,
but I'm out of ideas with my problem, the resulting query return non-
zero result in sqlplus prompt, but SQLAlchemy
return
Hi,
I'm developing a web application where users are allowed to specify
where statement. So I can capture it as a string, e.g.
( T1.C1=1 OR T1.C1=5) AND T3.C3 like 'test%'
where T1 is table 1 and C1 is column 1, and so on. Now the hard
question is how to add such string to sqlalchemy query? I've
it
to
underneath query, so whereclause validation is in place.
Thanks for reference.
Valentin.
On Apr 19, 1:20 pm, Michael Bayer [EMAIL PROTECTED] wrote:
On Apr 19, 2007, at 12:37 PM, vkuznet wrote:
Hi,
I'm developing a web application where users are allowed to specify
where statement. So I can
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