On 4/23/23 14:55, Michael P. McDonnell wrote:
That helped a ton, I don't understand why I've had to rewrite the crap
out of all of this to get it to work (dropping SqlAlchemy, upgrading
from psycopg2 to psycopg, etc...) but it's working now and I can work
around it. Thank you.
Well:
1) SQLAlchemy is an ORM that tries to make all databases look the same.
2) psycopg2 != psycopg. For details see:
https://www.psycopg.org/psycopg3/docs/basic/from_pg2.html
3) It would have been more of a surprise if you did not have to change
anything.
4) And this
with self.connection.cursor() as conn:
was just plain wrong. You where trying to make a cursor be a connection
and that is not going to work.
On Sun, Apr 23, 2023 at 4:25 PM Adrian Klaver <adrian.kla...@aklaver.com
<mailto:adrian.kla...@aklaver.com>> wrote:
On 4/23/23 13:45, Michael P. McDonnell wrote:
> Python 3.10.6
> psycopg library 3.1.8
>
> Running consecutive inserts sourced in files.
> All inserts are of the same format:
>
> INSERT INTO _____ (field1, field2, field3)
> SELECT field1, field2, field3 FROM ____, Join ___, join ___ etc...
>
> The code I've written is this:
>
> for qi in range(qlen):
> query = queries[qi]
> qparams = params[qi]
> with self.connection.cursor() as conn:
> conn.execute(query, qparams)
In above you are running the context manager(with) over the cursor not
the connection. This will not automatically commit the transaction. You
will need to either explicitly do connection.commit() or use the with
over the connection per:
https://www.psycopg.org/psycopg3/docs/basic/transactions.html
<https://www.psycopg.org/psycopg3/docs/basic/transactions.html>
>
> When I run the queries in dbeaver - the first query takes 120s (it's
> 1.9M rows), the second query takes 2s (7000 rows).
> When I run the queries in python - it freezes on the second query.
>
> Any guidance on how to attack this would be awesome as I have
re-written
> my code a dozen times and am just slinging mud to see what sticks.
--
Adrian Klaver
adrian.kla...@aklaver.com <mailto:adrian.kla...@aklaver.com>
--
Adrian Klaver
adrian.kla...@aklaver.com
