Hi,
I'm getting below error while trying to rename a primary key column.
*OperationalError: (OperationalError) (1025, Error on rename of
'.\\test\\#sql-540_8' to '.\\test\\users' (errno: 150)) '\nALTER TABLE
users CHANGE COLUMN user_id `Users_Id` INTEGER NOT NULL AUTO_INCREMENT' ()
*
Below is
Hi Pravin,
The problem you are seeing here is probably related to the fact you have
some other foreign keys that rely on the user_id column, Mysql will do
everything to make your life miserable if you change the name of the
column/size of type that has other constraints depend on it - and the
Hey Ergo,
Thanks for the reply.
I wonder what will happen to the performance when trying to drop and
recreate the foreign key constraints if the table has thousands of
data(lets say 50k)?
Regards
Pravin B
On Monday, 23 July 2012 19:02:23 UTC+5:30, Ergo wrote:
Hi Pravin,
The problem
Unless we are talking millions of rows and table of size 500+mb, nothing
happens - it will be very fast,
Normally when you start running alters on your table it will get locked for
a while, but unless the table is really big you wont notice anything.
The performance of those operations depends
I used TypeDecorator and get_dbapi_type to return the type object I wanted.
The parameters get the type cx_Oracle.TIMESTAMP for any filtering I do
myself, but the ones used in the version feature seem to ignore this and
thus still fail to locate the row.
On Friday, July 20, 2012 4:12:45 PM
I'm writing code that I'd like to be dialect-free as much as possible;
I'll be using at least MS SQL and PostgreSQL databases with equivalent
schemas. In the MS DBs, there are stored procedures that have OUT
parameters. The only way that I've found in some web searching to get
the values of
the sqlalchemy.types.TIMESTAMP type has dbapi.TIMESTAMP established as the
DBAPI type object to use.When the cx_oracle dialect is in use, the
cursor.setinputsizes() method is called, passing in a value for every type that
has a dbapi type defined with it, with the exception of a handful of
what does the DBAPI, pyodbc, have to say here ?When we use OUT parameters
with cx_oracle, cx_oracle has explicit support for OUT params, and SQLAlchemy
provides a special bind construct which works with it. To my knowledge pyodbc
has no such feature.
SQL Server should support the
