Records the current state of queries being tracked by WLM.
STV_WLM_QUERY_STATE is visible to all users. Superusers can see all rows; regular users can see only their own data. For more information, see Visibility of Data in System Tables and Views.
|Column Name||Data Type||Description|
|xid||integer||Transaction ID of the query or subquery.|
|task||integer||ID used to track a query through the workload manager. Can be associated with multiple query IDs. If a query is restarted, the query is assigned a new query ID but not a new task ID.|
|query||integer||Query ID. If a query is restarted, the query is assigned a new query ID but not a new task ID.|
|service_class||integer||ID for the service class. Service classes are defined in the WLM configuration.|
|slot_count||integer||Number of WLM query slots.|
|wlm_start_time||timestamp||Time that the query entered the system table queue or short query queue.|
|state||character(16)||Current state of the query or subquery.
Possible values are:
|queue_time||bigint||Number of microseconds that the query has spent in the queue.|
|exec_time||bigint||Number of microseconds that the query has been executing.|
Service classes 1 - 4 are used internally by Amazon Redshift, and service class 5 is reserved for the dedicated superuser queue. The following query displays all currently executing queries in service classes greater than 4, which are the superuser queue and the WLM query queues.
select xid, query, trim(state), queue_time, exec_time from stv_wlm_query_state where service_class > 4;
This query returns the following sample output:
xid | query | btrim | queue_time | exec_time -------+-------+---------+------------+----------- 100813 | 25942 | Running | 0 | 1369029 100074 | 25775 | Running | 0 | 2221589242