How to check open transactions on psycopg2 connection?

Question

How to check open transactions for psycopg2connection? I intend to add it to my unit / function tests since the Python DB API uses implicit transactions.

Answer 1

You can check the connection status:

from psycopg2.extensions import STATUS_BEGIN, STATUS_READY

if conn.status == STATUS_READY:
    print("No transaction in progress.")
elif conn.status == STATUS_BEGIN:
    print("A transaction is in progress.")

Alternatively, transaction status can be obtained with connection.get_transaction_status().

To manually verify a transaction in a process, you can use the PostgreSQL statistics collector :

SELECT * FROM pg_stat_activity WHERE state = 'idle in transaction';