Package google.spanner.admin.instance.v1

Index

InstanceAdmin (interface)
CreateInstanceMetadata (message)
CreateInstanceRequest (message)
DeleteInstanceRequest (message)
GetInstanceConfigRequest (message)
GetInstanceRequest (message)
Instance (message)
Instance.State (enum)
InstanceConfig (message)
ListInstanceConfigsRequest (message)
ListInstanceConfigsResponse (message)
ListInstancesRequest (message)
ListInstancesResponse (message)
ReplicaInfo (message)
ReplicaInfo.ReplicaType (enum)
UpdateInstanceMetadata (message)
UpdateInstanceRequest (message)

InstanceAdmin

Cloud Spanner Instance Admin API

The Cloud Spanner Instance Admin API can be used to create, delete, modify and list instances. Instances are dedicated Cloud Spanner serving and storage resources to be used by Cloud Spanner databases.

Each instance has a "configuration", which dictates where the serving resources for the Cloud Spanner instance are located (e.g., US-central, Europe). Configurations are created by Google based on resource availability.

Cloud Spanner billing is based on the instances that exist and their sizes. After an instance exists, there are no additional per-database or per-operation charges for use of the instance (though there may be additional network bandwidth charges). Instances offer isolation: problems with databases in one instance will not affect other instances. However, within an instance databases can affect each other. For example, if one database in an instance receives a lot of requests and consumes most of the instance resources, fewer resources are available for other databases in that instance, and their performance may suffer.

CreateInstance

CreateInstance
`rpc CreateInstance(CreateInstanceRequest) returns (Operation)` Creates an instance and begins preparing it to begin serving. The returned `long-running operation` can be used to track the progress of preparing the new instance. The instance name is assigned by the caller. If the named instance already exists, `CreateInstance` returns `ALREADY_EXISTS`. Immediately upon completion of this request: The instance is readable via the API, with all requested attributes but no allocated resources. Its state is `CREATING`. Until completion of the returned operation: Cancelling the operation renders the instance immediately unreadable via the API. The instance can be deleted. All other attempts to modify the instance are rejected. Upon completion of the returned operation: Billing for all successfully-allocated resources begins (some types may have lower than the requested levels). Databases can be created in the instance. The instance's allocated resource levels are readable via the API. The instance's state becomes `READY`. The returned `long-running operation` will have a name of the format `<instance_name>/operations/<operation_id>` and can be used to track creation of the instance. The `metadata` field type is `CreateInstanceMetadata`. The `response` field type is `Instance`, if successful. Authorization Scopes Requires one of the following OAuth scopes: `https://www.googleapis.com/auth/spanner.admin` `https://www.googleapis.com/auth/cloud-platform` For more information, see the Authentication Overview.

rpc CreateInstance(CreateInstanceRequest) returns (Operation)

Creates an instance and begins preparing it to begin serving. The returned long-running operation can be used to track the progress of preparing the new instance. The instance name is assigned by the caller. If the named instance already exists, CreateInstance returns ALREADY_EXISTS.

Immediately upon completion of this request:

The instance is readable via the API, with all requested attributes but no allocated resources. Its state is CREATING.

Until completion of the returned operation:

Cancelling the operation renders the instance immediately unreadable via the API.
The instance can be deleted.
All other attempts to modify the instance are rejected.

Upon completion of the returned operation:

Billing for all successfully-allocated resources begins (some types may have lower than the requested levels).
Databases can be created in the instance.
The instance's allocated resource levels are readable via the API.
The instance's state becomes READY.

The returned long-running operation will have a name of the format <instance_name>/operations/<operation_id> and can be used to track creation of the instance. The metadata field type is CreateInstanceMetadata. The response field type is Instance, if successful.

Authorization Scopes

Requires one of the following OAuth scopes:

https://www.googleapis.com/auth/spanner.admin
https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

DeleteInstance

DeleteInstance
`rpc DeleteInstance(DeleteInstanceRequest) returns (Empty)` Deletes an instance. Immediately upon completion of the request: Billing ceases for all of the instance's reserved resources. Soon afterward: The instance and all of its databases immediately and irrevocably disappear from the API. All data in the databases is permanently deleted. Authorization Scopes Requires one of the following OAuth scopes: `https://www.googleapis.com/auth/spanner.admin` `https://www.googleapis.com/auth/cloud-platform` For more information, see the Authentication Overview.

rpc DeleteInstance(DeleteInstanceRequest) returns (Empty)

Deletes an instance.

Immediately upon completion of the request:

Billing ceases for all of the instance's reserved resources.

Soon afterward:

The instance and all of its databases immediately and irrevocably disappear from the API. All data in the databases is permanently deleted.

Authorization Scopes

Requires one of the following OAuth scopes:

https://www.googleapis.com/auth/spanner.admin
https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

GetIamPolicy

GetIamPolicy
`rpc GetIamPolicy(GetIamPolicyRequest) returns (Policy)` Gets the access control policy for an instance resource. Returns an empty policy if an instance exists but does not have a policy set. Authorization requires `spanner.instances.getIamPolicy` on `resource`. Authorization Scopes Requires one of the following OAuth scopes: `https://www.googleapis.com/auth/spanner.admin` `https://www.googleapis.com/auth/cloud-platform` For more information, see the Authentication Overview.

rpc GetIamPolicy(GetIamPolicyRequest) returns (Policy)

Gets the access control policy for an instance resource. Returns an empty policy if an instance exists but does not have a policy set.

Authorization requires spanner.instances.getIamPolicy on resource.

Authorization Scopes

Requires one of the following OAuth scopes:

https://www.googleapis.com/auth/spanner.admin
https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

GetInstance

GetInstance
`rpc GetInstance(GetInstanceRequest) returns (Instance)` Gets information about a particular instance. Authorization Scopes Requires one of the following OAuth scopes: `https://www.googleapis.com/auth/spanner.admin` `https://www.googleapis.com/auth/cloud-platform` For more information, see the Authentication Overview.

rpc GetInstance(GetInstanceRequest) returns (Instance)

Gets information about a particular instance.

Authorization Scopes

Requires one of the following OAuth scopes:

https://www.googleapis.com/auth/spanner.admin
https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

GetInstanceConfig

GetInstanceConfig
`rpc GetInstanceConfig(GetInstanceConfigRequest) returns (InstanceConfig)` Gets information about a particular instance configuration. Authorization Scopes Requires one of the following OAuth scopes: `https://www.googleapis.com/auth/spanner.admin` `https://www.googleapis.com/auth/cloud-platform` For more information, see the Authentication Overview.

rpc GetInstanceConfig(GetInstanceConfigRequest) returns (InstanceConfig)

Gets information about a particular instance configuration.

Authorization Scopes

Requires one of the following OAuth scopes:

https://www.googleapis.com/auth/spanner.admin
https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

ListInstanceConfigs

ListInstanceConfigs
`rpc ListInstanceConfigs(ListInstanceConfigsRequest) returns (ListInstanceConfigsResponse)` Lists the supported instance configurations for a given project. Authorization Scopes Requires one of the following OAuth scopes: `https://www.googleapis.com/auth/spanner.admin` `https://www.googleapis.com/auth/cloud-platform` For more information, see the Authentication Overview.

rpc ListInstanceConfigs(ListInstanceConfigsRequest) returns (ListInstanceConfigsResponse)

Lists the supported instance configurations for a given project.

Authorization Scopes

Requires one of the following OAuth scopes:

https://www.googleapis.com/auth/spanner.admin
https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

ListInstances

ListInstances
`rpc ListInstances(ListInstancesRequest) returns (ListInstancesResponse)` Lists all instances in the given project. Authorization Scopes Requires one of the following OAuth scopes: `https://www.googleapis.com/auth/spanner.admin` `https://www.googleapis.com/auth/cloud-platform` For more information, see the Authentication Overview.

rpc ListInstances(ListInstancesRequest) returns (ListInstancesResponse)

Lists all instances in the given project.

Authorization Scopes

Requires one of the following OAuth scopes:

https://www.googleapis.com/auth/spanner.admin
https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

SetIamPolicy

SetIamPolicy
`rpc SetIamPolicy(SetIamPolicyRequest) returns (Policy)` Sets the access control policy on an instance resource. Replaces any existing policy. Authorization requires `spanner.instances.setIamPolicy` on `resource`. Authorization Scopes Requires one of the following OAuth scopes: `https://www.googleapis.com/auth/spanner.admin` `https://www.googleapis.com/auth/cloud-platform` For more information, see the Authentication Overview.

rpc SetIamPolicy(SetIamPolicyRequest) returns (Policy)

Sets the access control policy on an instance resource. Replaces any existing policy.

Authorization requires spanner.instances.setIamPolicy on resource.

Authorization Scopes

Requires one of the following OAuth scopes:

https://www.googleapis.com/auth/spanner.admin
https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

TestIamPermissions

TestIamPermissions
`rpc TestIamPermissions(TestIamPermissionsRequest) returns (TestIamPermissionsResponse)` Returns permissions that the caller has on the specified instance resource. Attempting this RPC on a non-existent Cloud Spanner instance resource will result in a NOT_FOUND error if the user has `spanner.instances.list` permission on the containing Google Cloud Project. Otherwise returns an empty set of permissions. Authorization Scopes Requires one of the following OAuth scopes: `https://www.googleapis.com/auth/spanner.admin` `https://www.googleapis.com/auth/cloud-platform` For more information, see the Authentication Overview.

rpc TestIamPermissions(TestIamPermissionsRequest) returns (TestIamPermissionsResponse)

Returns permissions that the caller has on the specified instance resource.

Attempting this RPC on a non-existent Cloud Spanner instance resource will result in a NOT_FOUND error if the user has spanner.instances.list permission on the containing Google Cloud Project. Otherwise returns an empty set of permissions.

Authorization Scopes

Requires one of the following OAuth scopes:

https://www.googleapis.com/auth/spanner.admin
https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

UpdateInstance

UpdateInstance
`rpc UpdateInstance(UpdateInstanceRequest) returns (Operation)` Updates an instance, and begins allocating or releasing resources as requested. The returned `long-running operation` can be used to track the progress of updating the instance. If the named instance does not exist, returns `NOT_FOUND`. Immediately upon completion of this request: For resource types for which a decrease in the instance's allocation has been requested, billing is based on the newly-requested level. Until completion of the returned operation: Cancelling the operation sets its metadata's `cancel_time`, and begins restoring resources to their pre-request values. The operation is guaranteed to succeed at undoing all resource changes, after which point it terminates with a `CANCELLED` status. All other attempts to modify the instance are rejected. Reading the instance via the API continues to give the pre-request resource levels. Upon completion of the returned operation: Billing begins for all successfully-allocated resources (some types may have lower than the requested levels). All newly-reserved resources are available for serving the instance's tables. The instance's new resource levels are readable via the API. The returned `long-running operation` will have a name of the format `<instance_name>/operations/<operation_id>` and can be used to track the instance modification. The `metadata` field type is `UpdateInstanceMetadata`. The `response` field type is `Instance`, if successful. Authorization requires `spanner.instances.update` permission on the resource `name`. Authorization Scopes Requires one of the following OAuth scopes: `https://www.googleapis.com/auth/spanner.admin` `https://www.googleapis.com/auth/cloud-platform` For more information, see the Authentication Overview.

rpc UpdateInstance(UpdateInstanceRequest) returns (Operation)

Updates an instance, and begins allocating or releasing resources as requested. The returned long-running operation can be used to track the progress of updating the instance. If the named instance does not exist, returns NOT_FOUND.

Immediately upon completion of this request:

For resource types for which a decrease in the instance's allocation has been requested, billing is based on the newly-requested level.

Until completion of the returned operation:

Cancelling the operation sets its metadata's cancel_time, and begins restoring resources to their pre-request values. The operation is guaranteed to succeed at undoing all resource changes, after which point it terminates with a CANCELLED status.
All other attempts to modify the instance are rejected.
Reading the instance via the API continues to give the pre-request resource levels.

Upon completion of the returned operation:

Billing begins for all successfully-allocated resources (some types may have lower than the requested levels).
All newly-reserved resources are available for serving the instance's tables.
The instance's new resource levels are readable via the API.

The returned long-running operation will have a name of the format <instance_name>/operations/<operation_id> and can be used to track the instance modification. The metadata field type is UpdateInstanceMetadata. The response field type is Instance, if successful.

Authorization requires spanner.instances.update permission on the resource name.

Authorization Scopes

Requires one of the following OAuth scopes:

https://www.googleapis.com/auth/spanner.admin
https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

CreateInstanceMetadata

Metadata type for the operation returned by CreateInstance.

Fields
`instance`	`Instance` The instance being created.
`start_time`	`Timestamp` The time at which the `CreateInstance` request was received.
`cancel_time`	`Timestamp` The time at which this operation was cancelled. If set, this operation is in the process of undoing itself (which is guaranteed to succeed) and cannot be cancelled again.
`end_time`	`Timestamp` The time at which this operation failed or was completed successfully.

CreateInstanceRequest

The request for CreateInstance.

Fields

Fields
`parent`	`string` Required. The name of the project in which to create the instance. Values are of the form `projects/<project>`. Authorization requires the following IAM permission on the specified resource `parent`: `spanner.instances.create`
`instance_id`	`string` Required. The ID of the instance to create. Valid identifiers are of the form `[a-z][-a-z0-9]*[a-z0-9]` and must be between 2 and 64 characters in length.
`instance`	`Instance` Required. The instance to create. The name may be omitted, but if specified must be `<parent>/instances/<instance_id>`.

parent

string

Required. The name of the project in which to create the instance. Values are of the form projects/<project>.

Authorization requires the following IAM permission on the specified resource parent:

spanner.instances.create

instance_id

string

Required. The ID of the instance to create. Valid identifiers are of the form [a-z][-a-z0-9]*[a-z0-9] and must be between 2 and 64 characters in length.

instance

Instance

Required. The instance to create. The name may be omitted, but if specified must be <parent>/instances/<instance_id>.

DeleteInstanceRequest

The request for DeleteInstance.

Fields

Fields
`name`	`string` Required. The name of the instance to be deleted. Values are of the form `projects/<project>/instances/<instance>` Authorization requires the following IAM permission on the specified resource `name`: `spanner.instances.delete`

name

string

Required. The name of the instance to be deleted. Values are of the form projects/<project>/instances/<instance>

Authorization requires the following IAM permission on the specified resource name:

spanner.instances.delete

GetInstanceConfigRequest

The request for GetInstanceConfigRequest.

Fields

Fields
`name`	`string` Required. The name of the requested instance configuration. Values are of the form `projects/<project>/instanceConfigs/<config>`. Authorization requires the following IAM permission on the specified resource `name`: `spanner.instanceConfigs.get`

name

string

Required. The name of the requested instance configuration. Values are of the form projects/<project>/instanceConfigs/<config>.

Authorization requires the following IAM permission on the specified resource name:

spanner.instanceConfigs.get

GetInstanceRequest

The request for GetInstance.

Fields

Fields
`name`	`string` Required. The name of the requested instance. Values are of the form `projects/<project>/instances/<instance>`. Authorization requires the following IAM permission on the specified resource `name`: `spanner.instances.get`
`field_mask`	`FieldMask` If field_mask is present, specifies the subset of `Instance` fields that should be returned. If absent, all `Instance` fields are returned.

name

string

Required. The name of the requested instance. Values are of the form projects/<project>/instances/<instance>.

Authorization requires the following IAM permission on the specified resource name:

spanner.instances.get

field_mask

FieldMask

If field_mask is present, specifies the subset of Instance fields that should be returned. If absent, all Instance fields are returned.

Instance

An isolated set of Cloud Spanner resources on which databases can be hosted.

Fields
`name`	`string` Required. A unique identifier for the instance, which cannot be changed after the instance is created. Values are of the form `projects/<project>/instances/[a-z][-a-z0-9]*[a-z0-9]`. The final segment of the name must be between 2 and 64 characters in length.
`config`	`string` Required. The name of the instance's configuration. Values are of the form `projects/<project>/instanceConfigs/<configuration>`. See also `InstanceConfig` and `ListInstanceConfigs`.
`display_name`	`string` Required. The descriptive name for this instance as it appears in UIs. Must be unique per project and between 4 and 30 characters in length.
`node_count`	`int32` The number of nodes allocated to this instance. At most one of either node_count or processing_units should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`. See the documentation for more information about nodes and processing units.
`processing_units`	`int32` The number of processing units allocated to this instance. At most one of processing_units or node_count should be present in the message. This may be zero in API responses for instances that are not yet in state `READY`. See the documentation for more information about nodes and processing units.
`state`	`State` Output only. The current instance state. For `CreateInstance`, the state must be either omitted or set to `CREATING`. For `UpdateInstance`, the state must be either omitted or set to `READY`.
`labels`	`map<string, string>` Cloud Labels are a flexible and lightweight mechanism for organizing cloud resources into groups that reflect a customer's organizational needs and deployment strategies. Cloud Labels can be used to filter collections of resources. They can be used to control how resource metrics are aggregated. And they can be used as arguments to policy management rules (e.g. route, firewall, load balancing, etc.). Label keys must be between 1 and 63 characters long and must conform to the following regular expression: `[a-z][a-z0-9_-]{0,62}`. Label values must be between 0 and 63 characters long and must conform to the regular expression `[a-z0-9_-]{0,63}`. No more than 64 labels can be associated with a given resource. See https://goo.gl/xmQnxf for more information on and examples of labels. If you plan to use labels in your own code, please note that additional characters may be allowed in the future. And so you are advised to use an internal label representation, such as JSON, which doesn't rely upon specific characters being disallowed. For example, representing labels as the string: name + "_" + value would prove problematic if we were to allow "_" in a future release.
`endpoint_uris[]`	`string` Deprecated. This field is not populated.
`create_time`	`Timestamp` Output only. The time at which the instance was created.
`update_time`	`Timestamp` Output only. The time at which the instance was most recently updated.

State

Indicates the current state of the instance.

Enums
`STATE_UNSPECIFIED`	Not specified.
`CREATING`	The instance is still being created. Resources may not be available yet, and operations such as database creation may not work.
`READY`	The instance is fully created and ready to do work such as creating databases.

InstanceConfig

A possible configuration for a Cloud Spanner instance. Configurations define the geographic placement of nodes and their replication.

Fields
`name`	`string` A unique identifier for the instance configuration. Values are of the form `projects/<project>/instanceConfigs/[a-z][-a-z0-9]*`.
`display_name`	`string` The name of this instance configuration as it appears in UIs.
`replicas[]`	`ReplicaInfo` The geographic placement of nodes in this instance configuration and their replication properties.
`leader_options[]`	`string` Allowed values of the "default_leader" schema option for databases in instances that use this instance configuration.

ListInstanceConfigsRequest

The request for ListInstanceConfigs.

Fields

Fields
`parent`	`string` Required. The name of the project for which a list of supported instance configurations is requested. Values are of the form `projects/<project>`. Authorization requires the following IAM permission on the specified resource `parent`: `spanner.instanceConfigs.list`
`page_size`	`int32` Number of instance configurations to be returned in the response. If 0 or less, defaults to the server's maximum allowed page size.
`page_token`	`string` If non-empty, `page_token` should contain a `next_page_token` from a previous `ListInstanceConfigsResponse`.

parent

string

Required. The name of the project for which a list of supported instance configurations is requested. Values are of the form projects/<project>.

Authorization requires the following IAM permission on the specified resource parent:

spanner.instanceConfigs.list

page_size

int32

Number of instance configurations to be returned in the response. If 0 or less, defaults to the server's maximum allowed page size.

page_token

string

If non-empty, page_token should contain a next_page_token from a previous ListInstanceConfigsResponse.

ListInstanceConfigsResponse

The response for ListInstanceConfigs.

Fields

Fields
`instance_configs[]`	`InstanceConfig` The list of requested instance configurations.
`next_page_token`	`string` `next_page_token` can be sent in a subsequent `ListInstanceConfigs` call to fetch more of the matching instance configurations.

instance_configs[]

InstanceConfig

The list of requested instance configurations.

next_page_token

string

next_page_token can be sent in a subsequent ListInstanceConfigs call to fetch more of the matching instance configurations.

ListInstancesRequest

The request for ListInstances.

Fields
`parent`	`string` Required. The name of the project for which a list of instances is requested. Values are of the form `projects/<project>`. Authorization requires the following IAM permission on the specified resource `parent`: `spanner.instances.list`
`page_size`	`int32` Number of instances to be returned in the response. If 0 or less, defaults to the server's maximum allowed page size.
`page_token`	`string` If non-empty, `page_token` should contain a `next_page_token` from a previous `ListInstancesResponse`.
`filter`	`string` An expression for filtering the results of the request. Filter rules are case insensitive. The fields eligible for filtering are: `name` `display_name` `labels.key` where key is the name of a label Some examples of using filters are: `name:` --> The instance has a name. `name:Howl` --> The instance's name contains the string "howl". `name:HOWL` --> Equivalent to above. `NAME:howl` --> Equivalent to above. `labels.env:` --> The instance has the label "env". `labels.env:dev` --> The instance has the label "env" and the value of the label contains the string "dev". `name:howl labels.env:dev` --> The instance's name contains "howl" and it has the label "env" with its value containing "dev".
`instance_deadline`	`Timestamp` Deadline used while retrieving metadata for instances. Instances whose metadata cannot be retrieved within this deadline will be added to `unreachable` in `ListInstancesResponse`.

ListInstancesResponse

The response for ListInstances.

Fields

Fields
`instances[]`	`Instance` The list of requested instances.
`next_page_token`	`string` `next_page_token` can be sent in a subsequent `ListInstances` call to fetch more of the matching instances.
`unreachable[]`	`string` The list of unreachable instances. It includes the names of instances whose metadata could not be retrieved within `instance_deadline`.

instances[]

Instance

The list of requested instances.

next_page_token

string

next_page_token can be sent in a subsequent ListInstances call to fetch more of the matching instances.

unreachable[]

string

The list of unreachable instances. It includes the names of instances whose metadata could not be retrieved within instance_deadline.

ReplicaInfo

Fields

Fields
`location`	`string` The location of the serving resources, e.g. "us-central1".
`type`	`ReplicaType` The type of replica.
`default_leader_location`	`bool` If true, this location is designated as the default leader location where leader replicas are placed. See the region types documentation for more details.

location

string

The location of the serving resources, e.g. "us-central1".

type

ReplicaType

The type of replica.

default_leader_location

bool

If true, this location is designated as the default leader location where leader replicas are placed. See the region types documentation for more details.

ReplicaType

Indicates the type of replica. See the replica types documentation for more details.

Enums
`TYPE_UNSPECIFIED`	Not specified.
`READ_WRITE`	Read-write replicas support both reads and writes. These replicas: Maintain a full copy of your data. Serve reads. Can vote whether to commit a write. Participate in leadership election. Are eligible to become a leader.
`READ_ONLY`	Read-only replicas only support reads (not writes). Read-only replicas: Maintain a full copy of your data. Serve reads. Do not participate in voting to commit writes. Are not eligible to become a leader.
`WITNESS`	Witness replicas don't support reads but do participate in voting to commit writes. Witness replicas: Do not maintain a full copy of data. Do not serve reads. Vote whether to commit writes. Participate in leader election but are not eligible to become leader.

UpdateInstanceMetadata

Metadata type for the operation returned by UpdateInstance.

Fields
`instance`	`Instance` The desired end state of the update.
`start_time`	`Timestamp` The time at which `UpdateInstance` request was received.
`cancel_time`	`Timestamp` The time at which this operation was cancelled. If set, this operation is in the process of undoing itself (which is guaranteed to succeed) and cannot be cancelled again.
`end_time`	`Timestamp` The time at which this operation failed or was completed successfully.

UpdateInstanceRequest

The request for UpdateInstance.

Fields

Fields
`instance`	`Instance` Required. The instance to update, which must always include the instance name. Otherwise, only fields mentioned in `field_mask` need be included. Authorization requires the following IAM permission on the specified resource `instance`: `spanner.instances.update`
`field_mask`	`FieldMask` Required. A mask specifying which fields in `Instance` should be updated. The field mask must always be specified; this prevents any future fields in `Instance` from being erased accidentally by clients that do not know about them.

instance

Instance

Required. The instance to update, which must always include the instance name. Otherwise, only fields mentioned in field_mask need be included.

Authorization requires the following IAM permission on the specified resource instance:

spanner.instances.update

field_mask

FieldMask

Required. A mask specifying which fields in Instance should be updated. The field mask must always be specified; this prevents any future fields in Instance from being erased accidentally by clients that do not know about them.