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Managing Datasets
~~~~~~~~~~~~~~~~~
A dataset represents a collection of tables, and applies several default
policies to tables as they are created:
- An access control list (ACL). When created, a dataset has an ACL
which maps to the ACL inherited from its project.
- A default table expiration period. If set, tables created within the
dataset will have the value as their expiration period.
See BigQuery documentation for more information on
`Datasets <https://cloud.google.com/bigquery/docs/datasets>`_.
Listing Datasets
^^^^^^^^^^^^^^^^
List datasets for a project with the
:func:`~google.cloud.bigquery.client.Client.list_datasets` method:
.. literalinclude:: ../samples/list_datasets.py
:language: python
:dedent: 4
:start-after: [START bigquery_list_datasets]
:end-before: [END bigquery_list_datasets]
List datasets by label for a project with the
:func:`~google.cloud.bigquery.client.Client.list_datasets` method:
.. literalinclude:: ../samples/list_datasets_by_label.py
:language: python
:dedent: 4
:start-after: [START bigquery_list_datasets_by_label]
:end-before: [END bigquery_list_datasets_by_label]
Getting a Dataset
^^^^^^^^^^^^^^^^^
Get a dataset resource (to pick up changes made by another client) with the
:func:`~google.cloud.bigquery.client.Client.get_dataset` method:
.. literalinclude:: ../samples/get_dataset.py
:language: python
:dedent: 4
:start-after: [START bigquery_get_dataset]
:end-before: [END bigquery_get_dataset]
Determine if a dataset exists with the
:func:`~google.cloud.bigquery.client.Client.get_dataset` method:
.. literalinclude:: ../samples/dataset_exists.py
:language: python
:dedent: 4
:start-after: [START bigquery_dataset_exists]
:end-before: [END bigquery_dataset_exists]
Creating a Dataset
^^^^^^^^^^^^^^^^^^
Create a new dataset with the
:func:`~google.cloud.bigquery.client.Client.create_dataset` method:
.. literalinclude:: ../samples/create_dataset.py
:language: python
:dedent: 4
:start-after: [START bigquery_create_dataset]
:end-before: [END bigquery_create_dataset]
Updating a Dataset
^^^^^^^^^^^^^^^^^^
Update a property in a dataset's metadata with the
:func:`~google.cloud.bigquery.client.Client.update_dataset` method:
.. literalinclude:: ../samples/update_dataset_description.py
:language: python
:dedent: 4
:start-after: [START bigquery_update_dataset_description]
:end-before: [END bigquery_update_dataset_description]
Modify user permissions on a dataset with the
:func:`~google.cloud.bigquery.client.Client.update_dataset` method:
.. literalinclude:: ../samples/update_dataset_access.py
:language: python
:dedent: 4
:start-after: [START bigquery_update_dataset_access]
:end-before: [END bigquery_update_dataset_access]
Manage Dataset labels
^^^^^^^^^^^^^^^^^^^^^
Add labels to a dataset with the
:func:`~google.cloud.bigquery.client.Client.update_dataset` method:
.. literalinclude:: ../samples/label_dataset.py
:language: python
:dedent: 4
:start-after: [START bigquery_label_dataset]
:end-before: [END bigquery_label_dataset]
Get dataset's labels with the
:func:`~google.cloud.bigquery.client.Client.get_dataset` method:
.. literalinclude:: ../samples/get_dataset_labels.py
:language: python
:dedent: 4
:start-after: [START bigquery_get_dataset_labels]
:end-before: [END bigquery_get_dataset_labels]
Delete dataset's labels with the
:func:`~google.cloud.bigquery.client.Client.update_dataset` method:
.. literalinclude:: ../samples/delete_dataset_labels.py
:language: python
:dedent: 4
:start-after: [START bigquery_delete_label_dataset]
:end-before: [END bigquery_delete_label_dataset]
Deleting a Dataset
^^^^^^^^^^^^^^^^^^
Delete a dataset with the
:func:`~google.cloud.bigquery.client.Client.delete_dataset` method:
.. literalinclude:: ../samples/delete_dataset.py
:language: python
:dedent: 4
:start-after: [START bigquery_delete_dataset]
:end-before: [END bigquery_delete_dataset]
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