Class Instance (1.10.0)

Instance(
    instance_id, client, configuration_name=None, node_count=1, display_name=None
)

Representation of a Cloud Spanner Instance.

We can use a Instance to:

  • reload itself
  • create itself
  • update itself
  • delete itself

Parameters

NameDescription
instance_id str

The ID of the instance.

client Client

The client that owns the instance. Provides authorization and a project ID.

configuration_name str

Name of the instance configuration defining how the instance will be created. Required for instances which do not yet exist.

node_count int

(Optional) Number of nodes allocated to the instance.

display_name str

(Optional) The display name for the instance in the Cloud Console UI. (Must be between 4 and 30 characters.) If this value is not set in the constructor, will fall back to the instance ID.

Properties

name

Instance name used in requests.

"projects/{project}/instances/{instance_id}"

Returns
TypeDescription
strThe instance name.

Methods

copy

copy()

Make a copy of this instance.

Copies the local data stored as simple types and copies the client attached to this instance.

Returns
TypeDescription
InstanceA copy of the current instance.

create

create()

Create this instance.

See https://cloud.google.com/spanner/reference/rpc/google.spanner.admin.instance.v1#google.spanner.admin.instance.v1.InstanceAdmin.CreateInstance

Exceptions
TypeDescription
Conflictif the instance already exists
Returns
TypeDescription
google.api_core.operation.Operationan operation instance

database

database(database_id, ddl_statements=(), pool=None)

Factory to create a database within this instance.

Parameters
NameDescription
database_id str

The ID of the instance.

ddl_statements list of string

(Optional) DDL statements, excluding the 'CREATE DATABSE' statement.

pool concrete subclass of AbstractSessionPool.

(Optional) session pool to be used by database.

Returns
TypeDescription
Databasea database owned by this instance.

delete

delete()

Mark an instance and all of its databases for permanent deletion.

See https://cloud.google.com/spanner/reference/rpc/google.spanner.admin.instance.v1#google.spanner.admin.instance.v1.InstanceAdmin.DeleteInstance

Immediately upon completion of the request:

  • Billing will cease for all of the instance's reserved resources.

Soon afterward:

  • The instance and all databases within the instance will be deleteed. All data in the databases will be permanently deleted.

exists

exists()
Returns
TypeDescription
boolTrue if the instance exists, else false

from_pb

from_pb(instance_pb, client)

Creates an instance from a protobuf.

Parameters
NameDescription
instance_pb google.spanner.v2.spanner_instance_admin_pb2.Instance

A instance protobuf object.

client Client

The client that owns the instance.

Exceptions
TypeDescription
ValueErrorif the instance name does not match projects/{project}/instances/{instance_id} or if the parsed project ID does not match the project ID on the client.
Returns
TypeDescription
InstanceThe instance parsed from the protobuf response.

list_databases

list_databases(page_size=None, page_token=None)
Parameters
NameDescription
page_size int

Optional. The maximum number of databases in each page of results from this request. Non-positive values are ignored. Defaults to a sensible value set by the API.

page_token str

Optional. If present, return the next batch of databases, using the value, which must correspond to the nextPageToken value returned in the previous response. Deprecated: use the pages property of the returned iterator instead of manually passing the token.

Returns
TypeDescription
google.api._ore.page_iterator.IteratorIterator of Database resources within the current instance.

reload

reload()
Exceptions
TypeDescription
NotFoundif the instance does not exist

update

update()

Update this instance.

See https://cloud.google.com/spanner/reference/rpc/google.spanner.admin.instance.v1#google.spanner.admin.instance.v1.InstanceAdmin.UpdateInstance

Exceptions
TypeDescription
NotFoundif the instance does not exist
Returns
TypeDescription
google.api_core.operation.Operationan operation instance