Stay organized with collections Save and categorize content based on your preferences.

ASSIGNMENTS view

The INFORMATION_SCHEMA.ASSIGNMENTS view contains a list of all current assignments within the administration project. Each row represents a single, current assignment. A current assignment is either pending or active and has not been deleted. For more information about reservation, see Introduction to Reservations.

Required permission

To query the INFORMATION_SCHEMA.ASSIGNMENTS view, you need the bigquery.reservationAssignments.list Identity and Access Management (IAM) permission for the project. Each of the following predefined IAM roles includes the required permission:

  • roles/bigquery.resourceAdmin
  • roles/bigquery.resourceEditor
  • roles/bigquery.resourceViewer
  • roles/bigquery.user
  • roles/bigquery.admin

For more information about BigQuery permissions, see Access control with IAM.

Schema

The INFORMATION_SCHEMA.ASSIGNMENTS view has the following schema:

Column name Data type Value
ddl STRING The DDL statement used to create this assignment.
project_id STRING ID of the administration project.
project_number INTEGER Number of the administration project.
assignment_id STRING ID that uniquely identifies the assignment.
reservation_name STRING Name of the reservation that the assignment uses.
job_type STRING The type of job that can use the reservation. Can be PIPELINE or QUERY.
assignee_id STRING ID that uniquely identifies the assignee resource.
assignee_number INTEGER Number that uniquely identifies the assignee resource.
assignee_type STRING Type of assignee resource. Can be organization, folder or project.

Scope and syntax

Queries against this view must include a region qualifier. If you do not specify a regional qualifier, metadata is retrieved from all regions. The following table explains the region scope for this view:

View name Resource scope Region scope
[PROJECT_ID.]`region-REGION`.INFORMATION_SCHEMA.ASSIGNMENTS[_BY_PROJECT]
Project level REGION
Replace the following:

  • Optional: PROJECT_ID: the ID of your Cloud project. If not specified, the default project is used.
  • REGION: any dataset region name. For example, region-us.

Example

To run the query against a project other than your default project, add the project ID in the following format:

`PROJECT_ID`.`region-REGION_NAME`.INFORMATION_SCHEMA.ASSIGNMENTS
.

Replace the following:

  • PROJECT_ID: the ID of the project to which you have assigned reservations.
  • REGION_NAME: the name of the region.

For example, `myproject`.`region-us`.INFORMATION_SCHEMA.ASSIGNMENTS.

The following example gets a project's currently assigned reservation and its slot capacity. This information is useful for debugging job performance by comparing the project's slot usage with the slot capacity of the reservation assigned to that project.

SELECT
  reservation.reservation_name,
  reservation.slot_capacity
FROM
  `RESERVATION_ADMIN_PROJECT.region-REGION_NAME`.
  INFORMATION_SCHEMA.ASSIGNMENTS_BY_PROJECT assignment
INNER JOIN
  `RESERVATION_ADMIN_PROJECT.region-REGION_NAME`.
  INFORMATION_SCHEMA.RESERVATIONS_BY_PROJECT AS reservation
ON
  (assignment.reservation_name = reservation.reservation_name)
WHERE
   assignment.assignee_id = "PROJECT_ID"
  AND job_type = "QUERY";