Manage materialized view replicas

This document describes how to manage materialized view replicas in BigQuery.

BigQuery management of materialized view replicas includes the following operations:

• List materialized view replicas
• Get information about materialized view replicas
• Delete materialized view replicas

For more information about materialized view replicas, see the following:

• Materialized view replicas
• Create materialized view replicas

Before you begin

Grant Identity and Access Management (IAM) roles that give users the necessary permissions to perform each task in this document. The permissions required to perform a task (if any) are listed in the "Required permissions" section of the task.

List materialized view replicas

You can list materialized view replicas through the Google Cloud console.

Required permissions

To list materialized view replicas in a dataset, you need the bigquery.tables.list IAM permission.

Each of the following predefined IAM roles includes the permissions that you need in order to list materialized view replicas in a dataset:

• roles/bigquery.user
• roles/bigquery.metadataViewer
• roles/bigquery.dataViewer
• roles/bigquery.dataOwner
• roles/bigquery.dataEditor
• roles/bigquery.admin

For more information on IAM roles and permissions in IAM, see Predefined roles and permissions.

To list the materialized view replicas in a dataset:

1. In the Explorer panel, expand your project and select a dataset.

2. Scroll through the list to see the tables in the dataset. Tables, views, and materialized views are identified by different icons. Materialized view replicas have the same icon as materialized views.

   

Get information about materialized view replicas

You can get information about a materialized view replica by using SQL, the bq command-line tool, or the BigQuery API.

Required permissions

To query information about a materialized view replica, you need the following Identity and Access Management (IAM) permissions:

• bigquery.tables.get
• bigquery.tables.list
• bigquery.routines.get
• bigquery.routines.list

Each of the following predefined IAM roles includes the preceding permissions:

• roles/bigquery.metadataViewer
• roles/bigquery.dataViewer
• roles/bigquery.admin

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

To get information about a materialized view replica, including the source materialized view:

SQL

To get information about materialized view replicas, query the INFORMATION_SCHEMA.TABLES view:

1. In the Google Cloud console, go to the BigQuery page.

   Go to BigQuery

2. In the query editor, enter the following statement:

   SELECT * FROM PROJECT_ID.DATASET_ID.INFORMATION_SCHEMA.TABLES
   WHERE table_type = 'MATERIALIZED VIEW';
   

   Replace the following:

   • PROJECT_ID: the name of the project that contains the materialized view replicas
   • DATASET_ID: the name of the dataset that contains the materialized view replicas

3. Click Run.

For more information about how to run queries, see Run an interactive query.

bq

Use the bq show command:

bq show --project=project_id --format=prettyjson dataset.materialized_view_replica

Replace the following:

• project_id: the project ID. You only need to include this flag to get information about a materialized view replica in a different project than the default project.
• dataset: the name of the dataset that contains the materialized view replica.
• materialized_view_replica: the name of the materialized view replica that you want information about.

Example:

Enter the following command to show information about the materialized view replica my_mv_replica in the report_views dataset in the myproject project.

bq show --project=myproject --format=prettyjson report_views.my_mv_replica

API

To get materialized view replica information by using the API, call the tables.get method.

Delete materialized view replicas

You can delete a materialized view replica through the Google Cloud console.

Caution: Deleting a materialized view replica can't be undone.

Required permissions

To delete materialized view replicas, you need the bigquery.tables.delete IAM permission.

Each of the following predefined IAM roles includes the permissions that you need in order to delete a materialized view replica:

• bigquery.dataEditor
• bigquery.dataOwner
• bigquery.admin

For more information about BigQuery Identity and Access Management (IAM), see Predefined roles and permissions.

1. In the Explorer pane, expand your project and select the materialized view replica.

2. Expand the Actions option and click Delete.

3. In the Delete materialized view? dialog, type delete into the field, and then click Delete.