Example:
dbadmin=> SELECT table_name, component, description
dbadmin-> FROM data_collector
dbadmin-> WHERE component = 'Cancels';
table_name | component | description
-----------+-----------+------------------
dc_cancels | Cancels | Canceled queries
(1 row)
dbadmin=> SELECT * FROM dc_cancels;
time | node_name | session_id | user_id | txn_id | user_name | active_query | reason
-----+-----------+------------+---------+--------+-----------+--------------+----
(0 rows)
Now I will run a simple SQL statement and hit CTRL+C after waiting for 2 seconds:
dbadmin=> SELECT SLEEP(30);
Cancel request sent
SLEEP
-------
28
(1 row)
dbadmin=> \x
Expanded display is on.
dbadmin=> SELECT * FROM dc_cancels;
-[ RECORD 1 ]+----------------------------------
time | 2018-11-08 04:30:22.246344-05
node_name | v_test_db_node0001
session_id | v_test_db_node0001-156234:0x7e7d2
user_id | 45035996273704962
txn_id | 45035996274463388
user_name | dbadmin
active_query | SELECT SLEEP(30);
reason | Session canceled on the initiator
Helpful Link:https://www.vertica.com/docs/latest/HTML/index.htm#Authoring/Glossary/DataCollector.htm
Have fun!
About the Author
James Knicely
Vertica Field Chief Technologist
I've had the privilege of working with many database technologies in my career. But after being introduced to Vertica in May of 2011 as a client, I was hooked on the new technology after witnessing a query run in milliseconds that had previously ran for hours on the legacy database we had in place. It was then that I knew I wanted to eventually join the Vertica team, and 4 years later I did! I am currently a Vertica evangelist and am ready to help you get on board! Please feel free to reach out to me with any questions you have about Vertica and make sure to follow my Vertica Quick Tips!
