Τη Τετάρτη, 2 Οκτωβρίου 2019 - 7:11:52 μ.μ. UTC+3, ο χρήστης Inada Naoki έγραψε: > 2019年10月3日(木) 0:56 Νίκος Βέργος <vergos.niko...@gmail.com>: > > > Τη Τετάρτη, 2 Οκτωβρίου 2019 - 8:26:38 π.μ. UTC+3, ο χρήστης Inada Naoki > > έγραψε: > > > MySQL connection can be closed automatically by various reasons. > > > For example, `wait_timeout` is the most common but not only reason for > > > closing the connection. > > > > > > You should connect and close MySQL connection for each HTTP request. > > > > > > Or you can use more smart connection pool (e.g. Engine in SQLAlchemy). > > > It provides `pool_recycle` and `pool_pre_ping` options. > > > > > > https://docs.sqlalchemy.org/en/13/core/pooling.html#setting-pool-recycle > > > > You mean that every time i insrt/update and in general having a > > cur.execute() i then need to close the pymysql connection in order to not > > have this error? > > > > No, I meant one new DB connection for each HTTP request, not for each DB > query.
After seeing a stackoverflow link, it was stating that: This is caused by a global cursor. Try creating and closing the cursor within each method a raw query is needed. cursor = connection.cursor() cursor.execute(query) cursor.close() Does that mean that i have to create a cursor then execute the SQL statement and the close the cursor? And i must do that before and after executing each SQL statement in all of my scripts? Doesn't the DB Connection have a directive to autoclose the resources? -- https://mail.python.org/mailman/listinfo/python-list
