SCHEMATA_OPTIONS view

The INFORMATION_SCHEMA.SCHEMATA_OPTIONS view contains one row for each option that is set in each dataset in a project.

Before you begin

To query the SCHEMATA_OPTIONS view for dataset metadata, you need the bigquery.datasets.get Identity and Access Management (IAM) permission at the project level.

Each of the following predefined IAM roles includes the permissions that you need in order to get the SCHEMATA_OPTIONS view:

roles/bigquery.admin
roles/bigquery.dataEditor
roles/bigquery.dataOwner
roles/bigquery.dataViewer

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

Schema

When you query the INFORMATION_SCHEMA.SCHEMATA_OPTIONS view, the query results contain one row for each option that is set in each dataset in a project.

The INFORMATION_SCHEMA.SCHEMATA_OPTIONS view has the following schema:

Column name	Data type	Value
`CATALOG_NAME`	`STRING`	The name of the project that contains the dataset
`SCHEMA_NAME`	`STRING`	The name of the dataset, also referred to as the `datasetId`
`OPTION_NAME`	`STRING`	The name of the option. For a list of supported options, see the schema options list.
`OPTION_TYPE`	`STRING`	The data type of the option
`OPTION_VALUE`	`STRING`	The value of the option

Scope and syntax

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

View Name	Resource scope	Region scope
`[PROJECT_ID.]INFORMATION_SCHEMA.SCHEMATA_OPTIONS`	Project level	US region
[PROJECT_ID.]`region-REGION`.INFORMATION_SCHEMA.SCHEMATA_OPTIONS	Project level	`REGION`

Replace the following:

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

Note: You must specify the location to query the INFORMATION_SCHEMA views and the location of the query execution must match the region of the INFORMATION_SCHEMA view.

Example

-- Returns metadata for datasets in a region.
SELECT * FROM region-us.INFORMATION_SCHEMA.SCHEMATA_OPTIONS;

Examples

Retrieve the default table expiration time for all datasets in your project

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

`PROJECT_ID`.INFORMATION_SCHEMA.SCHEMATA_OPTIONS

for example, `myproject`.INFORMATION_SCHEMA.SCHEMATA_OPTIONS.

SELECT
  *
FROM
  INFORMATION_SCHEMA.SCHEMATA_OPTIONS
WHERE
  option_name = 'default_table_expiration_days';

The result is similar to the following:

  +----------------+---------------+-------------------------------+-------------+---------------------+
  |  catalog_name  |  schema_name  |          option_name          | option_type |    option_value     |
  +----------------+---------------+-------------------------------+-------------+---------------------+
  | myproject      | mydataset3    | default_table_expiration_days | FLOAT64     | 0.08333333333333333 |
  | myproject      | mydataset2    | default_table_expiration_days | FLOAT64     | 90.0                |
  | myproject      | mydataset1    | default_table_expiration_days | FLOAT64     | 30.0                |
  +----------------+---------------+-------------------------------+-------------+---------------------+

Retrieve labels for all datasets in your project

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

`PROJECT_ID`.INFORMATION_SCHEMA.SCHEMATA_OPTIONS

; for example, `myproject`.INFORMATION_SCHEMA.SCHEMATA_OPTIONS.

SELECT
  *
FROM
  INFORMATION_SCHEMA.SCHEMATA_OPTIONS
WHERE
  option_name = 'labels';

The result is similar to the following:

  +----------------+---------------+-------------+---------------------------------+------------------------+
  |  catalog_name  |  schema_name  | option_name |          option_type            |      option_value      |
  +----------------+---------------+-------------+---------------------------------+------------------------+
  | myproject      | mydataset1    | labels      | ARRAY<STRUCT<STRING, STRING>>   | [STRUCT("org", "dev")] |
  | myproject      | mydataset2    | labels      | ARRAY<STRUCT<STRING, STRING>>   | [STRUCT("org", "dev")] |
  +----------------+---------------+-------------+---------------------------------+------------------------+