When paginating without cursors, it's possible to see phantom reads. E.g. paginating over a large set of data like so: // assume isolation level = READ COMMITTED SELECT * FROM users ORDER_BY age ASC LIMIT :pageSize OFFSET :page * :pageSize…
I am using the dotenv framework to connect my python script to a postgres database. I have a list of ids and want to delete all the rows containing thoses ids ids_to_delete = df["food_id"].tolist() conn = create_conn() with conn.cursor() as…
Following Sergey's example here, https://stackoverflow.com/a/60834163/1513027 I'm trying to create an anonymous DO block rather than a function. If I have the FETCH inside the block, it gives a syntax error, possibly wanting an INTO clause. And it doesn't matter whether…
I'm trying to use the .find() method in mongodb. The output yeilds a mongodb::Cursor. I'm unable to convert the cursor into a vector so that I can wrap them in a json and send it to my front-end. This is…
I'm migrating an Oracle PLSQL SP to be compatible with Postgres plpgsql (version PostgreSQL 13.6 on x86_64-pc-linux-gnu, compiled by x86_64-pc-linux-gnu-gcc (GCC) 7.4.0, 64-bit). The exception block of the PLSQL SP has the below code: exception when others then if CURR1%isopen…