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+<h1><a href="spanner_v1.html">Cloud Spanner API</a> . <a href="spanner_v1.projects.html">projects</a> . <a href="spanner_v1.projects.instances.html">instances</a> . <a href="spanner_v1.projects.instances.databases.html">databases</a></h1>
+<h2>Instance Methods</h2>
+<p class="toc_element">
+  <code><a href="spanner_v1.projects.instances.databases.operations.html">operations()</a></code>
+</p>
+<p class="firstline">Returns the operations Resource.</p>
+
+<p class="toc_element">
+  <code><a href="spanner_v1.projects.instances.databases.sessions.html">sessions()</a></code>
+</p>
+<p class="firstline">Returns the sessions Resource.</p>
+
+<p class="toc_element">
+  <code><a href="#create">create(parent=None, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Creates a new Cloud Spanner database and starts to prepare it for serving.</p>
+<p class="toc_element">
+  <code><a href="#dropDatabase">dropDatabase(database, x__xgafv=None)</a></code></p>
+<p class="firstline">Drops (aka deletes) a Cloud Spanner database.</p>
+<p class="toc_element">
+  <code><a href="#get">get(name=None, x__xgafv=None)</a></code></p>
+<p class="firstline">Gets the state of a Cloud Spanner database.</p>
+<p class="toc_element">
+  <code><a href="#getDdl">getDdl(database, x__xgafv=None)</a></code></p>
+<p class="firstline">Returns the schema of a Cloud Spanner database as a list of formatted</p>
+<p class="toc_element">
+  <code><a href="#getIamPolicy">getIamPolicy(resource, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Gets the access control policy for a database resource. Returns an empty</p>
+<p class="toc_element">
+  <code><a href="#list">list(parent=None, pageToken=None, x__xgafv=None, pageSize=None)</a></code></p>
+<p class="firstline">Lists Cloud Spanner databases.</p>
+<p class="toc_element">
+  <code><a href="#list_next">list_next(previous_request, previous_response)</a></code></p>
+<p class="firstline">Retrieves the next page of results.</p>
+<p class="toc_element">
+  <code><a href="#setIamPolicy">setIamPolicy(resource, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Sets the access control policy on a database resource. Replaces any</p>
+<p class="toc_element">
+  <code><a href="#testIamPermissions">testIamPermissions(resource, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Returns permissions that the caller has on the specified database resource.</p>
+<p class="toc_element">
+  <code><a href="#updateDdl">updateDdl(database, body, x__xgafv=None)</a></code></p>
+<p class="firstline">Updates the schema of a Cloud Spanner database by</p>
+<h3>Method Details</h3>
+<div class="method">
+    <code class="details" id="create">create(parent=None, body, x__xgafv=None)</code>
+  <pre>Creates a new Cloud Spanner database and starts to prepare it for serving.
+The returned long-running operation will
+have a name of the format `<database_name>/operations/<operation_id>` and
+can be used to track preparation of the database. The
+metadata field type is
+CreateDatabaseMetadata. The
+response field type is
+Database, if successful.
+
+Args:
+  parent: string, Required. The name of the instance that will serve the new database.
+Values are of the form `projects/<project>/instances/<instance>`. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # The request for CreateDatabase.
+    "extraStatements": [ # An optional list of DDL statements to run inside the newly created
+        # database. Statements can create tables, indexes, etc. These
+        # statements execute atomically with the creation of the database:
+        # if there is an error in any statement, the database is not created.
+      "A String",
+    ],
+    "createStatement": "A String", # Required. A `CREATE DATABASE` statement, which specifies the ID of the
+        # new database.  The database ID must conform to the regular expression
+        # `a-z*[a-z0-9]` and be between 2 and 30 characters in length.
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # This resource represents a long-running operation that is the result of a
+      # network API call.
+    "metadata": { # Service-specific metadata associated with the operation.  It typically
+        # contains progress information and common metadata such as create time.
+        # Some services might not provide such metadata.  Any method that returns a
+        # long-running operation should document the metadata type, if any.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "done": True or False, # If the value is `false`, it means the operation is still in progress.
+        # If true, the operation is completed, and either `error` or `response` is
+        # available.
+    "response": { # The normal response of the operation in case of success.  If the original
+        # method returns no data on success, such as `Delete`, the response is
+        # `google.protobuf.Empty`.  If the original method is standard
+        # `Get`/`Create`/`Update`, the response should be the resource.  For other
+        # methods, the response should have the type `XxxResponse`, where `Xxx`
+        # is the original method name.  For example, if the original method name
+        # is `TakeSnapshot()`, the inferred response type is
+        # `TakeSnapshotResponse`.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "name": "A String", # The server-assigned name, which is only unique within the same service that
+        # originally returns it. If you use the default HTTP mapping, the
+        # `name` should have the format of `operations/some/unique/name`.
+    "error": { # The `Status` type defines a logical error model that is suitable for different # The error result of the operation in case of failure or cancellation.
+        # programming environments, including REST APIs and RPC APIs. It is used by
+        # [gRPC](https://github.com/grpc). The error model is designed to be:
+        #
+        # - Simple to use and understand for most users
+        # - Flexible enough to meet unexpected needs
+        #
+        # # Overview
+        #
+        # The `Status` message contains three pieces of data: error code, error message,
+        # and error details. The error code should be an enum value of
+        # google.rpc.Code, but it may accept additional error codes if needed.  The
+        # error message should be a developer-facing English message that helps
+        # developers *understand* and *resolve* the error. If a localized user-facing
+        # error message is needed, put the localized message in the error details or
+        # localize it in the client. The optional error details may contain arbitrary
+        # information about the error. There is a predefined set of error detail types
+        # in the package `google.rpc` which can be used for common error conditions.
+        #
+        # # Language mapping
+        #
+        # The `Status` message is the logical representation of the error model, but it
+        # is not necessarily the actual wire format. When the `Status` message is
+        # exposed in different client libraries and different wire protocols, it can be
+        # mapped differently. For example, it will likely be mapped to some exceptions
+        # in Java, but more likely mapped to some error codes in C.
+        #
+        # # Other uses
+        #
+        # The error model and the `Status` message can be used in a variety of
+        # environments, either with or without APIs, to provide a
+        # consistent developer experience across different environments.
+        #
+        # Example uses of this error model include:
+        #
+        # - Partial errors. If a service needs to return partial errors to the client,
+        #     it may embed the `Status` in the normal response to indicate the partial
+        #     errors.
+        #
+        # - Workflow errors. A typical workflow has multiple steps. Each step may
+        #     have a `Status` message for error reporting purpose.
+        #
+        # - Batch operations. If a client uses batch request and batch response, the
+        #     `Status` message should be used directly inside batch response, one for
+        #     each error sub-response.
+        #
+        # - Asynchronous operations. If an API call embeds asynchronous operation
+        #     results in its response, the status of those operations should be
+        #     represented directly using the `Status` message.
+        #
+        # - Logging. If some API errors are stored in logs, the message `Status` could
+        #     be used directly after any stripping needed for security/privacy reasons.
+      "message": "A String", # A developer-facing error message, which should be in English. Any
+          # user-facing error message should be localized and sent in the
+          # google.rpc.Status.details field, or localized by the client.
+      "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+      "details": [ # A list of messages that carry the error details.  There will be a
+          # common set of message types for APIs to use.
+        {
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+      ],
+    },
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="dropDatabase">dropDatabase(database, x__xgafv=None)</code>
+  <pre>Drops (aka deletes) a Cloud Spanner database.
+
+Args:
+  database: string, Required. The database to be dropped. (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # A generic empty message that you can re-use to avoid defining duplicated
+      # empty messages in your APIs. A typical example is to use it as the request
+      # or the response type of an API method. For instance:
+      #
+      #     service Foo {
+      #       rpc Bar(google.protobuf.Empty) returns (google.protobuf.Empty);
+      #     }
+      #
+      # The JSON representation for `Empty` is empty JSON object `{}`.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="get">get(name=None, x__xgafv=None)</code>
+  <pre>Gets the state of a Cloud Spanner database.
+
+Args:
+  name: string, Required. The name of the requested database. Values are of the form
+`projects/<project>/instances/<instance>/databases/<database>`. (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # A Cloud Spanner database.
+    "state": "A String", # Output only. The current database state.
+    "name": "A String", # Required. The name of the database. Values are of the form
+        # `projects/<project>/instances/<instance>/databases/<database>`,
+        # where `<database>` is as specified in the `CREATE DATABASE`
+        # statement. This name can be passed to other API methods to
+        # identify the database.
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="getDdl">getDdl(database, x__xgafv=None)</code>
+  <pre>Returns the schema of a Cloud Spanner database as a list of formatted
+DDL statements. This method does not show pending schema updates, those may
+be queried using the Operations API.
+
+Args:
+  database: string, Required. The database whose schema we wish to get. (required)
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # The response for GetDatabaseDdl.
+    "statements": [ # A list of formatted DDL statements defining the schema of the database
+        # specified in the request.
+      "A String",
+    ],
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="getIamPolicy">getIamPolicy(resource, body, x__xgafv=None)</code>
+  <pre>Gets the access control policy for a database resource. Returns an empty
+policy if a database exists but does not have a policy set.
+
+Authorization requires `spanner.databases.getIamPolicy` permission on
+resource.
+
+Args:
+  resource: string, REQUIRED: The Cloud Spanner resource for which the policy is being retrieved. The format is `projects/<project ID>/instances/<instance ID>` for instance resources and `projects/<project ID>/instances/<instance ID>/databases/<database ID>` for database resources. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # Request message for `GetIamPolicy` method.
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Defines an Identity and Access Management (IAM) policy. It is used to
+      # specify access control policies for Cloud Platform resources.
+      #
+      #
+      # A `Policy` consists of a list of `bindings`. A `Binding` binds a list of
+      # `members` to a `role`, where the members can be user accounts, Google groups,
+      # Google domains, and service accounts. A `role` is a named list of permissions
+      # defined by IAM.
+      #
+      # **Example**
+      #
+      #     {
+      #       "bindings": [
+      #         {
+      #           "role": "roles/owner",
+      #           "members": [
+      #             "user:mike@example.com",
+      #             "group:admins@example.com",
+      #             "domain:google.com",
+      #             "serviceAccount:my-other-app@appspot.gserviceaccount.com",
+      #           ]
+      #         },
+      #         {
+      #           "role": "roles/viewer",
+      #           "members": ["user:sean@example.com"]
+      #         }
+      #       ]
+      #     }
+      #
+      # For a description of IAM and its features, see the
+      # [IAM developer's guide](https://cloud.google.com/iam).
+    "auditConfigs": [ # Specifies cloud audit logging configuration for this policy.
+      { # Specifies the audit configuration for a service.
+          # It consists of which permission types are logged, and what identities, if
+          # any, are exempted from logging.
+          # An AuditConifg must have one or more AuditLogConfigs.
+        "exemptedMembers": [ # Specifies the identities that are exempted from "data access" audit
+            # logging for the `service` specified above.
+            # Follows the same format of Binding.members.
+            # This field is deprecated in favor of per-permission-type exemptions.
+          "A String",
+        ],
+        "auditLogConfigs": [ # The configuration for logging of each type of permission.
+            # Next ID: 4
+          { # Provides the configuration for logging a type of permissions.
+              # Example:
+              #
+              #     {
+              #       "audit_log_configs": [
+              #         {
+              #           "log_type": "DATA_READ",
+              #           "exempted_members": [
+              #             "user:foo@gmail.com"
+              #           ]
+              #         },
+              #         {
+              #           "log_type": "DATA_WRITE",
+              #         }
+              #       ]
+              #     }
+              #
+              # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting
+              # foo@gmail.com from DATA_READ logging.
+            "exemptedMembers": [ # Specifies the identities that do not cause logging for this type of
+                # permission.
+                # Follows the same format of Binding.members.
+              "A String",
+            ],
+            "logType": "A String", # The log type that this config enables.
+          },
+        ],
+        "service": "A String", # Specifies a service that will be enabled for audit logging.
+            # For example, `resourcemanager`, `storage`, `compute`.
+            # `allServices` is a special value that covers all services.
+      },
+    ],
+    "rules": [ # If more than one rule is specified, the rules are applied in the following
+        # manner:
+        # - All matching LOG rules are always applied.
+        # - If any DENY/DENY_WITH_LOG rule matches, permission is denied.
+        #   Logging will be applied if one or more matching rule requires logging.
+        # - Otherwise, if any ALLOW/ALLOW_WITH_LOG rule matches, permission is
+        #   granted.
+        #   Logging will be applied if one or more matching rule requires logging.
+        # - Otherwise, if no rule applies, permission is denied.
+      { # A rule to be applied in a Policy.
+        "notIn": [ # If one or more 'not_in' clauses are specified, the rule matches
+            # if the PRINCIPAL/AUTHORITY_SELECTOR is in none of the entries.
+            # The format for in and not_in entries is the same as for members in a
+            # Binding (see google/iam/v1/policy.proto).
+          "A String",
+        ],
+        "description": "A String", # Human-readable description of the rule.
+        "in": [ # If one or more 'in' clauses are specified, the rule matches if
+            # the PRINCIPAL/AUTHORITY_SELECTOR is in at least one of these entries.
+          "A String",
+        ],
+        "action": "A String", # Required
+        "conditions": [ # Additional restrictions that must be met
+          { # A condition to be met.
+            "iam": "A String", # Trusted attributes supplied by the IAM system.
+            "svc": "A String", # Trusted attributes discharged by the service.
+            "value": "A String", # DEPRECATED. Use 'values' instead.
+            "sys": "A String", # Trusted attributes supplied by any service that owns resources and uses
+                # the IAM system for access control.
+            "values": [ # The objects of the condition. This is mutually exclusive with 'value'.
+              "A String",
+            ],
+            "op": "A String", # An operator to apply the subject with.
+          },
+        ],
+        "logConfig": [ # The config returned to callers of tech.iam.IAM.CheckPolicy for any entries
+            # that match the LOG action.
+          { # Specifies what kind of log the caller must write
+              # Increment a streamz counter with the specified metric and field names.
+              #
+              # Metric names should start with a '/', generally be lowercase-only,
+              # and end in "_count". Field names should not contain an initial slash.
+              # The actual exported metric names will have "/iam/policy" prepended.
+              #
+              # Field names correspond to IAM request parameters and field values are
+              # their respective values.
+              #
+              # At present the only supported field names are
+              #    - "iam_principal", corresponding to IAMContext.principal;
+              #    - "" (empty string), resulting in one aggretated counter with no field.
+              #
+              # Examples:
+              #   counter { metric: "/debug_access_count"  field: "iam_principal" }
+              #   ==> increment counter /iam/policy/backend_debug_access_count
+              #                         {iam_principal=[value of IAMContext.principal]}
+              #
+              # At this time we do not support:
+              # * multiple field names (though this may be supported in the future)
+              # * decrementing the counter
+              # * incrementing it by anything other than 1
+            "counter": { # Options for counters # Counter options.
+              "field": "A String", # The field value to attribute.
+              "metric": "A String", # The metric to update.
+            },
+            "dataAccess": { # Write a Data Access (Gin) log # Data access options.
+            },
+            "cloudAudit": { # Write a Cloud Audit log # Cloud audit options.
+            },
+          },
+        ],
+        "permissions": [ # A permission is a string of form '<service>.<resource type>.<verb>'
+            # (e.g., 'storage.buckets.list'). A value of '*' matches all permissions,
+            # and a verb part of '*' (e.g., 'storage.buckets.*') matches all verbs.
+          "A String",
+        ],
+      },
+    ],
+    "version": 42, # Version of the `Policy`. The default version is 0.
+    "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
+        # prevent simultaneous updates of a policy from overwriting each other.
+        # It is strongly suggested that systems make use of the `etag` in the
+        # read-modify-write cycle to perform policy updates in order to avoid race
+        # conditions: An `etag` is returned in the response to `getIamPolicy`, and
+        # systems are expected to put that etag in the request to `setIamPolicy` to
+        # ensure that their change will be applied to the same version of the policy.
+        #
+        # If no `etag` is provided in the call to `setIamPolicy`, then the existing
+        # policy is overwritten blindly.
+    "bindings": [ # Associates a list of `members` to a `role`.
+        # Multiple `bindings` must not be specified for the same `role`.
+        # `bindings` with no members will result in an error.
+      { # Associates `members` with a `role`.
+        "role": "A String", # Role that is assigned to `members`.
+            # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+            # Required
+        "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
+            # `members` can have the following values:
+            #
+            # * `allUsers`: A special identifier that represents anyone who is
+            #    on the internet; with or without a Google account.
+            #
+            # * `allAuthenticatedUsers`: A special identifier that represents anyone
+            #    who is authenticated with a Google account or a service account.
+            #
+            # * `user:{emailid}`: An email address that represents a specific Google
+            #    account. For example, `alice@gmail.com` or `joe@example.com`.
+            #
+            #
+            # * `serviceAccount:{emailid}`: An email address that represents a service
+            #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
+            #
+            # * `group:{emailid}`: An email address that represents a Google group.
+            #    For example, `admins@example.com`.
+            #
+            # * `domain:{domain}`: A Google Apps domain name that represents all the
+            #    users of that domain. For example, `google.com` or `example.com`.
+            #
+          "A String",
+        ],
+      },
+    ],
+    "iamOwned": True or False,
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list">list(parent=None, pageToken=None, x__xgafv=None, pageSize=None)</code>
+  <pre>Lists Cloud Spanner databases.
+
+Args:
+  parent: string, Required. The instance whose databases should be listed.
+Values are of the form `projects/<project>/instances/<instance>`. (required)
+  pageToken: string, If non-empty, `page_token` should contain a
+next_page_token from a
+previous ListDatabasesResponse.
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+  pageSize: integer, Number of databases to be returned in the response. If 0 or less,
+defaults to the server's maximum allowed page size.
+
+Returns:
+  An object of the form:
+
+    { # The response for ListDatabases.
+    "nextPageToken": "A String", # `next_page_token` can be sent in a subsequent
+        # ListDatabases call to fetch more
+        # of the matching databases.
+    "databases": [ # Databases that matched the request.
+      { # A Cloud Spanner database.
+        "state": "A String", # Output only. The current database state.
+        "name": "A String", # Required. The name of the database. Values are of the form
+            # `projects/<project>/instances/<instance>/databases/<database>`,
+            # where `<database>` is as specified in the `CREATE DATABASE`
+            # statement. This name can be passed to other API methods to
+            # identify the database.
+      },
+    ],
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="list_next">list_next(previous_request, previous_response)</code>
+  <pre>Retrieves the next page of results.
+
+Args:
+  previous_request: The request for the previous page. (required)
+  previous_response: The response from the request for the previous page. (required)
+
+Returns:
+  A request object that you can call 'execute()' on to request the next
+  page. Returns None if there are no more items in the collection.
+    </pre>
+</div>
+
+<div class="method">
+    <code class="details" id="setIamPolicy">setIamPolicy(resource, body, x__xgafv=None)</code>
+  <pre>Sets the access control policy on a database resource. Replaces any
+existing policy.
+
+Authorization requires `spanner.databases.setIamPolicy` permission on
+resource.
+
+Args:
+  resource: string, REQUIRED: The Cloud Spanner resource for which the policy is being set. The format is `projects/<project ID>/instances/<instance ID>` for instance resources and `projects/<project ID>/instances/<instance ID>/databases/<database ID>` for databases resources. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # Request message for `SetIamPolicy` method.
+    "policy": { # Defines an Identity and Access Management (IAM) policy. It is used to # REQUIRED: The complete policy to be applied to the `resource`. The size of
+        # the policy is limited to a few 10s of KB. An empty policy is a
+        # valid policy but certain Cloud Platform services (such as Projects)
+        # might reject them.
+        # specify access control policies for Cloud Platform resources.
+        #
+        #
+        # A `Policy` consists of a list of `bindings`. A `Binding` binds a list of
+        # `members` to a `role`, where the members can be user accounts, Google groups,
+        # Google domains, and service accounts. A `role` is a named list of permissions
+        # defined by IAM.
+        #
+        # **Example**
+        #
+        #     {
+        #       "bindings": [
+        #         {
+        #           "role": "roles/owner",
+        #           "members": [
+        #             "user:mike@example.com",
+        #             "group:admins@example.com",
+        #             "domain:google.com",
+        #             "serviceAccount:my-other-app@appspot.gserviceaccount.com",
+        #           ]
+        #         },
+        #         {
+        #           "role": "roles/viewer",
+        #           "members": ["user:sean@example.com"]
+        #         }
+        #       ]
+        #     }
+        #
+        # For a description of IAM and its features, see the
+        # [IAM developer's guide](https://cloud.google.com/iam).
+      "auditConfigs": [ # Specifies cloud audit logging configuration for this policy.
+        { # Specifies the audit configuration for a service.
+            # It consists of which permission types are logged, and what identities, if
+            # any, are exempted from logging.
+            # An AuditConifg must have one or more AuditLogConfigs.
+          "exemptedMembers": [ # Specifies the identities that are exempted from "data access" audit
+              # logging for the `service` specified above.
+              # Follows the same format of Binding.members.
+              # This field is deprecated in favor of per-permission-type exemptions.
+            "A String",
+          ],
+          "auditLogConfigs": [ # The configuration for logging of each type of permission.
+              # Next ID: 4
+            { # Provides the configuration for logging a type of permissions.
+                # Example:
+                #
+                #     {
+                #       "audit_log_configs": [
+                #         {
+                #           "log_type": "DATA_READ",
+                #           "exempted_members": [
+                #             "user:foo@gmail.com"
+                #           ]
+                #         },
+                #         {
+                #           "log_type": "DATA_WRITE",
+                #         }
+                #       ]
+                #     }
+                #
+                # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting
+                # foo@gmail.com from DATA_READ logging.
+              "exemptedMembers": [ # Specifies the identities that do not cause logging for this type of
+                  # permission.
+                  # Follows the same format of Binding.members.
+                "A String",
+              ],
+              "logType": "A String", # The log type that this config enables.
+            },
+          ],
+          "service": "A String", # Specifies a service that will be enabled for audit logging.
+              # For example, `resourcemanager`, `storage`, `compute`.
+              # `allServices` is a special value that covers all services.
+        },
+      ],
+      "rules": [ # If more than one rule is specified, the rules are applied in the following
+          # manner:
+          # - All matching LOG rules are always applied.
+          # - If any DENY/DENY_WITH_LOG rule matches, permission is denied.
+          #   Logging will be applied if one or more matching rule requires logging.
+          # - Otherwise, if any ALLOW/ALLOW_WITH_LOG rule matches, permission is
+          #   granted.
+          #   Logging will be applied if one or more matching rule requires logging.
+          # - Otherwise, if no rule applies, permission is denied.
+        { # A rule to be applied in a Policy.
+          "notIn": [ # If one or more 'not_in' clauses are specified, the rule matches
+              # if the PRINCIPAL/AUTHORITY_SELECTOR is in none of the entries.
+              # The format for in and not_in entries is the same as for members in a
+              # Binding (see google/iam/v1/policy.proto).
+            "A String",
+          ],
+          "description": "A String", # Human-readable description of the rule.
+          "in": [ # If one or more 'in' clauses are specified, the rule matches if
+              # the PRINCIPAL/AUTHORITY_SELECTOR is in at least one of these entries.
+            "A String",
+          ],
+          "action": "A String", # Required
+          "conditions": [ # Additional restrictions that must be met
+            { # A condition to be met.
+              "iam": "A String", # Trusted attributes supplied by the IAM system.
+              "svc": "A String", # Trusted attributes discharged by the service.
+              "value": "A String", # DEPRECATED. Use 'values' instead.
+              "sys": "A String", # Trusted attributes supplied by any service that owns resources and uses
+                  # the IAM system for access control.
+              "values": [ # The objects of the condition. This is mutually exclusive with 'value'.
+                "A String",
+              ],
+              "op": "A String", # An operator to apply the subject with.
+            },
+          ],
+          "logConfig": [ # The config returned to callers of tech.iam.IAM.CheckPolicy for any entries
+              # that match the LOG action.
+            { # Specifies what kind of log the caller must write
+                # Increment a streamz counter with the specified metric and field names.
+                #
+                # Metric names should start with a '/', generally be lowercase-only,
+                # and end in "_count". Field names should not contain an initial slash.
+                # The actual exported metric names will have "/iam/policy" prepended.
+                #
+                # Field names correspond to IAM request parameters and field values are
+                # their respective values.
+                #
+                # At present the only supported field names are
+                #    - "iam_principal", corresponding to IAMContext.principal;
+                #    - "" (empty string), resulting in one aggretated counter with no field.
+                #
+                # Examples:
+                #   counter { metric: "/debug_access_count"  field: "iam_principal" }
+                #   ==> increment counter /iam/policy/backend_debug_access_count
+                #                         {iam_principal=[value of IAMContext.principal]}
+                #
+                # At this time we do not support:
+                # * multiple field names (though this may be supported in the future)
+                # * decrementing the counter
+                # * incrementing it by anything other than 1
+              "counter": { # Options for counters # Counter options.
+                "field": "A String", # The field value to attribute.
+                "metric": "A String", # The metric to update.
+              },
+              "dataAccess": { # Write a Data Access (Gin) log # Data access options.
+              },
+              "cloudAudit": { # Write a Cloud Audit log # Cloud audit options.
+              },
+            },
+          ],
+          "permissions": [ # A permission is a string of form '<service>.<resource type>.<verb>'
+              # (e.g., 'storage.buckets.list'). A value of '*' matches all permissions,
+              # and a verb part of '*' (e.g., 'storage.buckets.*') matches all verbs.
+            "A String",
+          ],
+        },
+      ],
+      "version": 42, # Version of the `Policy`. The default version is 0.
+      "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
+          # prevent simultaneous updates of a policy from overwriting each other.
+          # It is strongly suggested that systems make use of the `etag` in the
+          # read-modify-write cycle to perform policy updates in order to avoid race
+          # conditions: An `etag` is returned in the response to `getIamPolicy`, and
+          # systems are expected to put that etag in the request to `setIamPolicy` to
+          # ensure that their change will be applied to the same version of the policy.
+          #
+          # If no `etag` is provided in the call to `setIamPolicy`, then the existing
+          # policy is overwritten blindly.
+      "bindings": [ # Associates a list of `members` to a `role`.
+          # Multiple `bindings` must not be specified for the same `role`.
+          # `bindings` with no members will result in an error.
+        { # Associates `members` with a `role`.
+          "role": "A String", # Role that is assigned to `members`.
+              # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+              # Required
+          "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
+              # `members` can have the following values:
+              #
+              # * `allUsers`: A special identifier that represents anyone who is
+              #    on the internet; with or without a Google account.
+              #
+              # * `allAuthenticatedUsers`: A special identifier that represents anyone
+              #    who is authenticated with a Google account or a service account.
+              #
+              # * `user:{emailid}`: An email address that represents a specific Google
+              #    account. For example, `alice@gmail.com` or `joe@example.com`.
+              #
+              #
+              # * `serviceAccount:{emailid}`: An email address that represents a service
+              #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
+              #
+              # * `group:{emailid}`: An email address that represents a Google group.
+              #    For example, `admins@example.com`.
+              #
+              # * `domain:{domain}`: A Google Apps domain name that represents all the
+              #    users of that domain. For example, `google.com` or `example.com`.
+              #
+            "A String",
+          ],
+        },
+      ],
+      "iamOwned": True or False,
+    },
+    "updateMask": "A String", # OPTIONAL: A FieldMask specifying which fields of the policy to modify. Only
+        # the fields in the mask will be modified. If no mask is provided, a default
+        # mask is used:
+        # paths: "bindings, etag"
+        # This field is only used by Cloud IAM.
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Defines an Identity and Access Management (IAM) policy. It is used to
+      # specify access control policies for Cloud Platform resources.
+      #
+      #
+      # A `Policy` consists of a list of `bindings`. A `Binding` binds a list of
+      # `members` to a `role`, where the members can be user accounts, Google groups,
+      # Google domains, and service accounts. A `role` is a named list of permissions
+      # defined by IAM.
+      #
+      # **Example**
+      #
+      #     {
+      #       "bindings": [
+      #         {
+      #           "role": "roles/owner",
+      #           "members": [
+      #             "user:mike@example.com",
+      #             "group:admins@example.com",
+      #             "domain:google.com",
+      #             "serviceAccount:my-other-app@appspot.gserviceaccount.com",
+      #           ]
+      #         },
+      #         {
+      #           "role": "roles/viewer",
+      #           "members": ["user:sean@example.com"]
+      #         }
+      #       ]
+      #     }
+      #
+      # For a description of IAM and its features, see the
+      # [IAM developer's guide](https://cloud.google.com/iam).
+    "auditConfigs": [ # Specifies cloud audit logging configuration for this policy.
+      { # Specifies the audit configuration for a service.
+          # It consists of which permission types are logged, and what identities, if
+          # any, are exempted from logging.
+          # An AuditConifg must have one or more AuditLogConfigs.
+        "exemptedMembers": [ # Specifies the identities that are exempted from "data access" audit
+            # logging for the `service` specified above.
+            # Follows the same format of Binding.members.
+            # This field is deprecated in favor of per-permission-type exemptions.
+          "A String",
+        ],
+        "auditLogConfigs": [ # The configuration for logging of each type of permission.
+            # Next ID: 4
+          { # Provides the configuration for logging a type of permissions.
+              # Example:
+              #
+              #     {
+              #       "audit_log_configs": [
+              #         {
+              #           "log_type": "DATA_READ",
+              #           "exempted_members": [
+              #             "user:foo@gmail.com"
+              #           ]
+              #         },
+              #         {
+              #           "log_type": "DATA_WRITE",
+              #         }
+              #       ]
+              #     }
+              #
+              # This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting
+              # foo@gmail.com from DATA_READ logging.
+            "exemptedMembers": [ # Specifies the identities that do not cause logging for this type of
+                # permission.
+                # Follows the same format of Binding.members.
+              "A String",
+            ],
+            "logType": "A String", # The log type that this config enables.
+          },
+        ],
+        "service": "A String", # Specifies a service that will be enabled for audit logging.
+            # For example, `resourcemanager`, `storage`, `compute`.
+            # `allServices` is a special value that covers all services.
+      },
+    ],
+    "rules": [ # If more than one rule is specified, the rules are applied in the following
+        # manner:
+        # - All matching LOG rules are always applied.
+        # - If any DENY/DENY_WITH_LOG rule matches, permission is denied.
+        #   Logging will be applied if one or more matching rule requires logging.
+        # - Otherwise, if any ALLOW/ALLOW_WITH_LOG rule matches, permission is
+        #   granted.
+        #   Logging will be applied if one or more matching rule requires logging.
+        # - Otherwise, if no rule applies, permission is denied.
+      { # A rule to be applied in a Policy.
+        "notIn": [ # If one or more 'not_in' clauses are specified, the rule matches
+            # if the PRINCIPAL/AUTHORITY_SELECTOR is in none of the entries.
+            # The format for in and not_in entries is the same as for members in a
+            # Binding (see google/iam/v1/policy.proto).
+          "A String",
+        ],
+        "description": "A String", # Human-readable description of the rule.
+        "in": [ # If one or more 'in' clauses are specified, the rule matches if
+            # the PRINCIPAL/AUTHORITY_SELECTOR is in at least one of these entries.
+          "A String",
+        ],
+        "action": "A String", # Required
+        "conditions": [ # Additional restrictions that must be met
+          { # A condition to be met.
+            "iam": "A String", # Trusted attributes supplied by the IAM system.
+            "svc": "A String", # Trusted attributes discharged by the service.
+            "value": "A String", # DEPRECATED. Use 'values' instead.
+            "sys": "A String", # Trusted attributes supplied by any service that owns resources and uses
+                # the IAM system for access control.
+            "values": [ # The objects of the condition. This is mutually exclusive with 'value'.
+              "A String",
+            ],
+            "op": "A String", # An operator to apply the subject with.
+          },
+        ],
+        "logConfig": [ # The config returned to callers of tech.iam.IAM.CheckPolicy for any entries
+            # that match the LOG action.
+          { # Specifies what kind of log the caller must write
+              # Increment a streamz counter with the specified metric and field names.
+              #
+              # Metric names should start with a '/', generally be lowercase-only,
+              # and end in "_count". Field names should not contain an initial slash.
+              # The actual exported metric names will have "/iam/policy" prepended.
+              #
+              # Field names correspond to IAM request parameters and field values are
+              # their respective values.
+              #
+              # At present the only supported field names are
+              #    - "iam_principal", corresponding to IAMContext.principal;
+              #    - "" (empty string), resulting in one aggretated counter with no field.
+              #
+              # Examples:
+              #   counter { metric: "/debug_access_count"  field: "iam_principal" }
+              #   ==> increment counter /iam/policy/backend_debug_access_count
+              #                         {iam_principal=[value of IAMContext.principal]}
+              #
+              # At this time we do not support:
+              # * multiple field names (though this may be supported in the future)
+              # * decrementing the counter
+              # * incrementing it by anything other than 1
+            "counter": { # Options for counters # Counter options.
+              "field": "A String", # The field value to attribute.
+              "metric": "A String", # The metric to update.
+            },
+            "dataAccess": { # Write a Data Access (Gin) log # Data access options.
+            },
+            "cloudAudit": { # Write a Cloud Audit log # Cloud audit options.
+            },
+          },
+        ],
+        "permissions": [ # A permission is a string of form '<service>.<resource type>.<verb>'
+            # (e.g., 'storage.buckets.list'). A value of '*' matches all permissions,
+            # and a verb part of '*' (e.g., 'storage.buckets.*') matches all verbs.
+          "A String",
+        ],
+      },
+    ],
+    "version": 42, # Version of the `Policy`. The default version is 0.
+    "etag": "A String", # `etag` is used for optimistic concurrency control as a way to help
+        # prevent simultaneous updates of a policy from overwriting each other.
+        # It is strongly suggested that systems make use of the `etag` in the
+        # read-modify-write cycle to perform policy updates in order to avoid race
+        # conditions: An `etag` is returned in the response to `getIamPolicy`, and
+        # systems are expected to put that etag in the request to `setIamPolicy` to
+        # ensure that their change will be applied to the same version of the policy.
+        #
+        # If no `etag` is provided in the call to `setIamPolicy`, then the existing
+        # policy is overwritten blindly.
+    "bindings": [ # Associates a list of `members` to a `role`.
+        # Multiple `bindings` must not be specified for the same `role`.
+        # `bindings` with no members will result in an error.
+      { # Associates `members` with a `role`.
+        "role": "A String", # Role that is assigned to `members`.
+            # For example, `roles/viewer`, `roles/editor`, or `roles/owner`.
+            # Required
+        "members": [ # Specifies the identities requesting access for a Cloud Platform resource.
+            # `members` can have the following values:
+            #
+            # * `allUsers`: A special identifier that represents anyone who is
+            #    on the internet; with or without a Google account.
+            #
+            # * `allAuthenticatedUsers`: A special identifier that represents anyone
+            #    who is authenticated with a Google account or a service account.
+            #
+            # * `user:{emailid}`: An email address that represents a specific Google
+            #    account. For example, `alice@gmail.com` or `joe@example.com`.
+            #
+            #
+            # * `serviceAccount:{emailid}`: An email address that represents a service
+            #    account. For example, `my-other-app@appspot.gserviceaccount.com`.
+            #
+            # * `group:{emailid}`: An email address that represents a Google group.
+            #    For example, `admins@example.com`.
+            #
+            # * `domain:{domain}`: A Google Apps domain name that represents all the
+            #    users of that domain. For example, `google.com` or `example.com`.
+            #
+          "A String",
+        ],
+      },
+    ],
+    "iamOwned": True or False,
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="testIamPermissions">testIamPermissions(resource, body, x__xgafv=None)</code>
+  <pre>Returns permissions that the caller has on the specified database resource.
+
+Attempting this RPC on a non-existent Cloud Spanner database will result in
+a NOT_FOUND error if the user has `spanner.databases.list` permission on
+the containing Cloud Spanner instance. Otherwise returns an empty set of
+permissions.
+
+Args:
+  resource: string, REQUIRED: The Cloud Spanner resource for which permissions are being tested. The format is `projects/<project ID>/instances/<instance ID>` for instance resources and `projects/<project ID>/instances/<instance ID>/databases/<database ID>` for database resources. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # Request message for `TestIamPermissions` method.
+    "permissions": [ # REQUIRED: The set of permissions to check for 'resource'.
+        # Permissions with wildcards (such as '*', 'spanner.*', 'spanner.instances.*') are not allowed.
+      "A String",
+    ],
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # Response message for `TestIamPermissions` method.
+    "permissions": [ # A subset of `TestPermissionsRequest.permissions` that the caller is
+        # allowed.
+      "A String",
+    ],
+  }</pre>
+</div>
+
+<div class="method">
+    <code class="details" id="updateDdl">updateDdl(database, body, x__xgafv=None)</code>
+  <pre>Updates the schema of a Cloud Spanner database by
+creating/altering/dropping tables, columns, indexes, etc. The returned
+long-running operation will have a name of
+the format `<database_name>/operations/<operation_id>` and can be used to
+track execution of the schema change(s). The
+metadata field type is
+UpdateDatabaseDdlMetadata.  The operation has no response.
+
+Args:
+  database: string, Required. The database to update. (required)
+  body: object, The request body. (required)
+    The object takes the form of:
+
+{ # Enqueues the given DDL statements to be applied, in order but not
+      # necessarily all at once, to the database schema at some point (or
+      # points) in the future. The server checks that the statements
+      # are executable (syntactically valid, name tables that exist, etc.)
+      # before enqueueing them, but they may still fail upon
+      # later execution (e.g., if a statement from another batch of
+      # statements is applied first and it conflicts in some way, or if
+      # there is some data-related problem like a `NULL` value in a column to
+      # which `NOT NULL` would be added). If a statement fails, all
+      # subsequent statements in the batch are automatically cancelled.
+      # 
+      # Each batch of statements is assigned a name which can be used with
+      # the Operations API to monitor
+      # progress. See the
+      # operation_id field for more
+      # details.
+    "statements": [ # DDL statements to be applied to the database.
+      "A String",
+    ],
+    "operationId": "A String", # If empty, the new update request is assigned an
+        # automatically-generated operation ID. Otherwise, `operation_id`
+        # is used to construct the name of the resulting
+        # Operation.
+        # 
+        # Specifying an explicit operation ID simplifies determining
+        # whether the statements were executed in the event that the
+        # UpdateDatabaseDdl call is replayed,
+        # or the return value is otherwise lost: the database and
+        # `operation_id` fields can be combined to form the
+        # name of the resulting
+        # longrunning.Operation: `<database>/operations/<operation_id>`.
+        # 
+        # `operation_id` should be unique within the database, and must be
+        # a valid identifier: `a-z*`. Note that
+        # automatically-generated operation IDs always begin with an
+        # underscore. If the named operation already exists,
+        # UpdateDatabaseDdl returns
+        # `ALREADY_EXISTS`.
+  }
+
+  x__xgafv: string, V1 error format.
+    Allowed values
+      1 - v1 error format
+      2 - v2 error format
+
+Returns:
+  An object of the form:
+
+    { # This resource represents a long-running operation that is the result of a
+      # network API call.
+    "metadata": { # Service-specific metadata associated with the operation.  It typically
+        # contains progress information and common metadata such as create time.
+        # Some services might not provide such metadata.  Any method that returns a
+        # long-running operation should document the metadata type, if any.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "done": True or False, # If the value is `false`, it means the operation is still in progress.
+        # If true, the operation is completed, and either `error` or `response` is
+        # available.
+    "response": { # The normal response of the operation in case of success.  If the original
+        # method returns no data on success, such as `Delete`, the response is
+        # `google.protobuf.Empty`.  If the original method is standard
+        # `Get`/`Create`/`Update`, the response should be the resource.  For other
+        # methods, the response should have the type `XxxResponse`, where `Xxx`
+        # is the original method name.  For example, if the original method name
+        # is `TakeSnapshot()`, the inferred response type is
+        # `TakeSnapshotResponse`.
+      "a_key": "", # Properties of the object. Contains field @type with type URL.
+    },
+    "name": "A String", # The server-assigned name, which is only unique within the same service that
+        # originally returns it. If you use the default HTTP mapping, the
+        # `name` should have the format of `operations/some/unique/name`.
+    "error": { # The `Status` type defines a logical error model that is suitable for different # The error result of the operation in case of failure or cancellation.
+        # programming environments, including REST APIs and RPC APIs. It is used by
+        # [gRPC](https://github.com/grpc). The error model is designed to be:
+        #
+        # - Simple to use and understand for most users
+        # - Flexible enough to meet unexpected needs
+        #
+        # # Overview
+        #
+        # The `Status` message contains three pieces of data: error code, error message,
+        # and error details. The error code should be an enum value of
+        # google.rpc.Code, but it may accept additional error codes if needed.  The
+        # error message should be a developer-facing English message that helps
+        # developers *understand* and *resolve* the error. If a localized user-facing
+        # error message is needed, put the localized message in the error details or
+        # localize it in the client. The optional error details may contain arbitrary
+        # information about the error. There is a predefined set of error detail types
+        # in the package `google.rpc` which can be used for common error conditions.
+        #
+        # # Language mapping
+        #
+        # The `Status` message is the logical representation of the error model, but it
+        # is not necessarily the actual wire format. When the `Status` message is
+        # exposed in different client libraries and different wire protocols, it can be
+        # mapped differently. For example, it will likely be mapped to some exceptions
+        # in Java, but more likely mapped to some error codes in C.
+        #
+        # # Other uses
+        #
+        # The error model and the `Status` message can be used in a variety of
+        # environments, either with or without APIs, to provide a
+        # consistent developer experience across different environments.
+        #
+        # Example uses of this error model include:
+        #
+        # - Partial errors. If a service needs to return partial errors to the client,
+        #     it may embed the `Status` in the normal response to indicate the partial
+        #     errors.
+        #
+        # - Workflow errors. A typical workflow has multiple steps. Each step may
+        #     have a `Status` message for error reporting purpose.
+        #
+        # - Batch operations. If a client uses batch request and batch response, the
+        #     `Status` message should be used directly inside batch response, one for
+        #     each error sub-response.
+        #
+        # - Asynchronous operations. If an API call embeds asynchronous operation
+        #     results in its response, the status of those operations should be
+        #     represented directly using the `Status` message.
+        #
+        # - Logging. If some API errors are stored in logs, the message `Status` could
+        #     be used directly after any stripping needed for security/privacy reasons.
+      "message": "A String", # A developer-facing error message, which should be in English. Any
+          # user-facing error message should be localized and sent in the
+          # google.rpc.Status.details field, or localized by the client.
+      "code": 42, # The status code, which should be an enum value of google.rpc.Code.
+      "details": [ # A list of messages that carry the error details.  There will be a
+          # common set of message types for APIs to use.
+        {
+          "a_key": "", # Properties of the object. Contains field @type with type URL.
+        },
+      ],
+    },
+  }</pre>
+</div>
+
+</body></html>
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