Schema:: ACCOUNT_USAGE

TASK_HISTORY View¶

This Account Usage view enables you to retrieve the history of task usage within the last 365 days (1 year). The view displays one row for each run of a task in the history.

Columns¶

Column Name	Data Type	Description
NAME	TEXT	Name of the task.
QUERY_TEXT	TEXT	Text of the SQL statement.
CONDITION_TEXT	TEXT	Text of WHEN condition the task evaluates when determining whether to run.
SCHEMA_NAME	TEXT	Name of the schema that contains the task.
TASK_SCHEMA_ID	NUMBER	Internal/system-generated identifier for the schema that contains the task.
DATABASE_NAME	TEXT	Name of the database that contains the task.
TASK_DATABASE_ID	NUMBER	Internal/system-generated identifier for the database that contains the task.
SCHEDULED_TIME	TIMESTAMP_LTZ	Time when the task is/was scheduled to start running. Note that we make a best effort to ensure absolute precision, but only guarantee that tasks do not execute before the scheduled time.
COMPLETED_TIME	TIMESTAMP_LTZ	Time when the task completed.
STATE	TEXT	Status of the completed task: SUCCEEDED, FAILED, CANCELLED, or SKIPPED. Note that the view does not return SCHEDULED or EXECUTING task runs. To retrieve the task history details for runs in a scheduled or executing state, query the TASK_HISTORY table function in the Information Schema.
RETURN_VALUE	TEXT	Value set for the predecessor task in a DAG of tasks. The return value is explicitly set by calling the SYSTEM$SET_RETURN_VALUE function by the predecessor task.
QUERY_ID	TEXT	ID of the SQL statement executed by the task. Can be joined with the QUERY_HISTORY view for additional details about the execution of the statement or stored procedure.
QUERY_START_TIME	TIMESTAMP_LTZ	Time when the query in the task definition started to run. This timestamp aligns with the start time for the query returned by QUERY_HISTORY.
ERROR_CODE	NUMBER	Error code, if the statement returned an error.
ERROR_MESSAGE	TEXT	Error message, if the statement returned an error.
GRAPH_VERSION	NUMBER	Integer identifying the version of the DAG that was run, or is scheduled to be run. Each incremental increase in the value represents one or more modifications to tasks in the DAG. If the root task is recreated (using CREATE OR REPLACE TASK), then the version number restarts from 1.
RUN_ID	NUMBER	Time when the standalone or root task in a DAG is/was originally scheduled to start running. Format is epoch time (in milliseconds). . . Original scheduled time refers to rare instances when the system may reschedule the same task to run at a different time to retry it or rebalance the load. If that happens, RUN_ID shows the original scheduled run time and SCHEDULED_TIME shows the rescheduled run time. . . Note that RUN_ID may not be a unique identifier for the current task/graph run prior to retry. You may use GRAPH_RUN_GROUP_ID column as a replacement for RUN_ID.
ROOT_TASK_ID	TEXT	Unique identifier for the root task in a DAG. This ID matches the ID column value in the SHOW TASKS output for the same task.
SCHEDULED_FROM	TEXT	Mechanism that prompted the task run: SCHEDULE indicates that the task run was initiated by the schedule in the task definition. EXECUTE TASK indicates that the task run was initiated by an EXECUTE TASK statement execution. For runs of child tasks in a DAG, the column returns the same value as the root task run.
ATTEMPT_NUMBER	NUMBER	Integer representing the number of attempts to run this task. Initially one.
INSTANCE_ID	NUMBER	Internal/system-generated identifier for the instance which the object belongs to.
CONFIG	TEXT	Displays the graph level configuration if set for the root task, otherwise displays NULL.
QUERY_HASH	TEXT	The hash value computed based on the canonicalized SQL text. 1
QUERY_HASH_VERSION	NUMBER	The version of the logic used to compute `QUERY_HASH`. 1
QUERY_PARAMETERIZED_HASH	TEXT	The hash value computed based on the parameterized query. 1
QUERY_PARAMETERIZED_HASH_VERSION	NUMBER	The version of the logic used to compute `QUERY_PARAMETERIZED_HASH`. 1
GRAPH_RUN_GROUP_ID	NUMBER	Identifier for the graph run. When a graph run has multiple task runs, each task run will show the same GRAPH_RUN_GROUP_ID. The combination of GRAPH_RUN_GROUP_ID, and ATTEMPT_NUMBER can be used to uniquely identify a graph run.

1(1,2,3,4): This column is present only when the 2023_06 behavior change bundle is enabled. This column is part of the query hash feature.

Usage Notes¶

Latency for the view may be up to 45 minutes.
For increased performance, filter queries on the COMPLETED_TIME or SCHEDULED_TIME column. See the Examples section (in this topic).

Examples¶

Retrieve records for the 10 most recent completed task runs:

SELECT query_text, completed_time
FROM snowflake.account_usage.task_history
LIMIT 10;

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Retrieve records for task runs completed in the past hour:

SELECT query_text, completed_time
FROM snowflake.account_usage.task_history
WHERE COMPLETED_TIME > DATEADD(hours, -1, CURRENT_TIMESTAMP());

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