/**
 * Copyright 2019 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { GaxiosPromise } from 'gaxios';
import { Compute, JWT, OAuth2Client, UserRefreshClient } from 'google-auth-library';
import { BodyResponseCallback, GlobalOptions, GoogleConfigurable, MethodOptions } from 'googleapis-common';
export declare namespace spanner_v1 {
    interface Options extends GlobalOptions {
        version: 'v1';
    }
    interface StandardParameters {
        /**
         * V1 error format.
         */
        '$.xgafv'?: string;
        /**
         * OAuth access token.
         */
        access_token?: string;
        /**
         * Data format for response.
         */
        alt?: string;
        /**
         * JSONP
         */
        callback?: string;
        /**
         * Selector specifying which fields to include in a partial response.
         */
        fields?: string;
        /**
         * API key. Your API key identifies your project and provides you with API
         * access, quota, and reports. Required unless you provide an OAuth 2.0
         * token.
         */
        key?: string;
        /**
         * OAuth 2.0 token for the current user.
         */
        oauth_token?: string;
        /**
         * Returns response with indentations and line breaks.
         */
        prettyPrint?: boolean;
        /**
         * Available to use for quota purposes for server-side applications. Can be
         * any arbitrary string assigned to a user, but should not exceed 40
         * characters.
         */
        quotaUser?: string;
        /**
         * Legacy upload protocol for media (e.g. "media", "multipart").
         */
        uploadType?: string;
        /**
         * Upload protocol for media (e.g. "raw", "multipart").
         */
        upload_protocol?: string;
    }
    /**
     * Cloud Spanner API
     *
     * Cloud Spanner is a managed, mission-critical, globally consistent and
     * scalable relational database service.
     *
     * @example
     * const {google} = require('googleapis');
     * const spanner = google.spanner('v1');
     *
     * @namespace spanner
     * @type {Function}
     * @version v1
     * @variation v1
     * @param {object=} options Options for Spanner
     */
    class Spanner {
        projects: Resource$Projects;
        constructor(options: GlobalOptions, google?: GoogleConfigurable);
    }
    /**
     * The request for BeginTransaction.
     */
    interface Schema$BeginTransactionRequest {
        /**
         * Required. Options for the new transaction.
         */
        options?: Schema$TransactionOptions;
    }
    /**
     * Associates `members` with a `role`.
     */
    interface Schema$Binding {
        /**
         * Unimplemented. The condition that is associated with this binding. NOTE:
         * an unsatisfied condition will not allow user access via current binding.
         * Different bindings, including their conditions, are examined
         * independently.
         */
        condition?: Schema$Expr;
        /**
         * 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` .
         * * `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`.
         */
        members?: string[];
        /**
         * Role that is assigned to `members`. For example, `roles/viewer`,
         * `roles/editor`, or `roles/owner`.
         */
        role?: string;
    }
    /**
     * Metadata associated with a parent-child relationship appearing in a
     * PlanNode.
     */
    interface Schema$ChildLink {
        /**
         * The node to which the link points.
         */
        childIndex?: number;
        /**
         * The type of the link. For example, in Hash Joins this could be used to
         * distinguish between the build child and the probe child, or in the case
         * of the child being an output variable, to represent the tag associated
         * with the output variable.
         */
        type?: string;
        /**
         * Only present if the child node is SCALAR and corresponds to an output
         * variable of the parent node. The field carries the name of the output
         * variable. For example, a `TableScan` operator that reads rows from a
         * table will have child links to the `SCALAR` nodes representing the output
         * variables created for each column that is read by the operator. The
         * corresponding `variable` fields will be set to the variable names
         * assigned to the columns.
         */
        variable?: string;
    }
    /**
     * The request for Commit.
     */
    interface Schema$CommitRequest {
        /**
         * The mutations to be executed when this transaction commits. All mutations
         * are applied atomically, in the order they appear in this list.
         */
        mutations?: Schema$Mutation[];
        /**
         * Execute mutations in a temporary transaction. Note that unlike commit of
         * a previously-started transaction, commit with a temporary transaction is
         * non-idempotent. That is, if the `CommitRequest` is sent to Cloud Spanner
         * more than once (for instance, due to retries in the application, or in
         * the transport library), it is possible that the mutations are executed
         * more than once. If this is undesirable, use BeginTransaction and Commit
         * instead.
         */
        singleUseTransaction?: Schema$TransactionOptions;
        /**
         * Commit a previously-started transaction.
         */
        transactionId?: string;
    }
    /**
     * The response for Commit.
     */
    interface Schema$CommitResponse {
        /**
         * The Cloud Spanner timestamp at which the transaction committed.
         */
        commitTimestamp?: string;
    }
    /**
     * Metadata type for the operation returned by CreateDatabase.
     */
    interface Schema$CreateDatabaseMetadata {
        /**
         * The database being created.
         */
        database?: string;
    }
    /**
     * The request for CreateDatabase.
     */
    interface Schema$CreateDatabaseRequest {
        /**
         * Required. A `CREATE DATABASE` statement, which specifies the ID of the
         * new database.  The database ID must conform to the regular expression
         * `a-z*[a-z0-9]` and be between 2 and 30 characters in length. If the
         * database ID is a reserved word or if it contains a hyphen, the database
         * ID must be enclosed in backticks (`` ` ``).
         */
        createStatement?: string;
        /**
         * An optional list of DDL statements to run inside the newly created
         * database. Statements can create tables, indexes, etc. These statements
         * execute atomically with the creation of the database: if there is an
         * error in any statement, the database is not created.
         */
        extraStatements?: string[];
    }
    /**
     * Metadata type for the operation returned by CreateInstance.
     */
    interface Schema$CreateInstanceMetadata {
        /**
         * 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.
         */
        cancelTime?: string;
        /**
         * The time at which this operation failed or was completed successfully.
         */
        endTime?: string;
        /**
         * The instance being created.
         */
        instance?: Schema$Instance;
        /**
         * The time at which the CreateInstance request was received.
         */
        startTime?: string;
    }
    /**
     * The request for CreateInstance.
     */
    interface Schema$CreateInstanceRequest {
        /**
         * Required. The instance to create.  The name may be omitted, but if
         * specified must be `<parent>/instances/<instance_id>`.
         */
        instance?: Schema$Instance;
        /**
         * Required. The ID of the instance to create.  Valid identifiers are of the
         * form `a-z*[a-z0-9]` and must be between 6 and 30 characters in length.
         */
        instanceId?: string;
    }
    /**
     * The request for CreateSession.
     */
    interface Schema$CreateSessionRequest {
        /**
         * The session to create.
         */
        session?: Schema$Session;
    }
    /**
     * A Cloud Spanner database.
     */
    interface Schema$Database {
        /**
         * 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.
         */
        name?: string;
        /**
         * Output only. The current database state.
         */
        state?: string;
    }
    /**
     * Arguments to delete operations.
     */
    interface Schema$Delete {
        /**
         * Required. The primary keys of the rows within table to delete. Delete is
         * idempotent. The transaction will succeed even if some or all rows do not
         * exist.
         */
        keySet?: Schema$KeySet;
        /**
         * Required. The table whose rows will be deleted.
         */
        table?: string;
    }
    /**
     * 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 `{}`.
     */
    interface Schema$Empty {
    }
    /**
     * The request for ExecuteSql and ExecuteStreamingSql.
     */
    interface Schema$ExecuteSqlRequest {
        /**
         * The SQL string can contain parameter placeholders. A parameter
         * placeholder consists of `'@'` followed by the parameter name.
         * Parameter names consist of any combination of letters, numbers, and
         * underscores.  Parameters can appear anywhere that a literal value is
         * expected.  The same parameter name can be used more than once, for
         * example:   `"WHERE id > @msg_id AND id < @msg_id + 100"`
         * It is an error to execute an SQL statement with unbound parameters.
         * Parameter values are specified using `params`, which is a JSON object
         * whose keys are parameter names, and whose values are the corresponding
         * parameter values.
         */
        params?: {
            [key: string]: any;
        };
        /**
         * It is not always possible for Cloud Spanner to infer the right SQL type
         * from a JSON value.  For example, values of type `BYTES` and values of
         * type `STRING` both appear in params as JSON strings.  In these cases,
         * `param_types` can be used to specify the exact SQL type for some or all
         * of the SQL statement parameters. See the definition of Type for more
         * information about SQL types.
         */
        paramTypes?: {
            [key: string]: Schema$Type;
        };
        /**
         * If present, results will be restricted to the specified partition
         * previously created using PartitionQuery().  There must be an exact match
         * for the values of fields common to this message and the
         * PartitionQueryRequest message used to create this partition_token.
         */
        partitionToken?: string;
        /**
         * Used to control the amount of debugging information returned in
         * ResultSetStats. If partition_token is set, query_mode can only be set to
         * QueryMode.NORMAL.
         */
        queryMode?: string;
        /**
         * If this request is resuming a previously interrupted SQL statement
         * execution, `resume_token` should be copied from the last PartialResultSet
         * yielded before the interruption. Doing this enables the new SQL statement
         * execution to resume where the last one left off. The rest of the request
         * parameters must exactly match the request that yielded this token.
         */
        resumeToken?: string;
        /**
         * A per-transaction sequence number used to identify this request. This
         * makes each request idempotent such that if the request is received
         * multiple times, at most one will succeed.  The sequence number must be
         * monotonically increasing within the transaction. If a request arrives for
         * the first time with an out-of-order sequence number, the transaction may
         * be aborted. Replays of previously handled requests will yield the same
         * response as the first execution.  Required for DML statements. Ignored
         * for queries.
         */
        seqno?: string;
        /**
         * Required. The SQL string.
         */
        sql?: string;
        /**
         * The transaction to use. If none is provided, the default is a temporary
         * read-only transaction with strong concurrency.  The transaction to use.
         * For queries, if none is provided, the default is a temporary read-only
         * transaction with strong concurrency.  Standard DML statements require a
         * ReadWrite transaction. Single-use transactions are not supported (to
         * avoid replay).  The caller must either supply an existing transaction ID
         * or begin a new transaction.  Partitioned DML requires an existing
         * PartitionedDml transaction ID.
         */
        transaction?: Schema$TransactionSelector;
    }
    /**
     * Represents an expression text. Example:      title: "User account
     * presence"     description: "Determines whether the request has a
     * user account"     expression: "size(request.user) > 0"
     */
    interface Schema$Expr {
        /**
         * An optional description of the expression. This is a longer text which
         * describes the expression, e.g. when hovered over it in a UI.
         */
        description?: string;
        /**
         * Textual representation of an expression in Common Expression Language
         * syntax.  The application context of the containing message determines
         * which well-known feature set of CEL is supported.
         */
        expression?: string;
        /**
         * An optional string indicating the location of the expression for error
         * reporting, e.g. a file name and a position in the file.
         */
        location?: string;
        /**
         * An optional title for the expression, i.e. a short string describing its
         * purpose. This can be used e.g. in UIs which allow to enter the
         * expression.
         */
        title?: string;
    }
    /**
     * Message representing a single field of a struct.
     */
    interface Schema$Field {
        /**
         * The name of the field. For reads, this is the column name. For SQL
         * queries, it is the column alias (e.g., `"Word"` in the query
         * `"SELECT 'hello' AS Word"`), or the column name (e.g.,
         * `"ColName"` in the query `"SELECT ColName FROM
         * Table"`). Some columns might have an empty name (e.g., !"SELECT
         * UPPER(ColName)"`). Note that a query result can contain multiple
         * fields with the same name.
         */
        name?: string;
        /**
         * The type of the field.
         */
        type?: Schema$Type;
    }
    /**
     * The response for GetDatabaseDdl.
     */
    interface Schema$GetDatabaseDdlResponse {
        /**
         * A list of formatted DDL statements defining the schema of the database
         * specified in the request.
         */
        statements?: string[];
    }
    /**
     * Request message for `GetIamPolicy` method.
     */
    interface Schema$GetIamPolicyRequest {
    }
    /**
     * An isolated set of Cloud Spanner resources on which databases can be
     * hosted.
     */
    interface Schema$Instance {
        /**
         * Required. The name of the instance's configuration. Values are of the
         * form `projects/<project>/instanceConfigs/<configuration>`.
         * See also InstanceConfig and ListInstanceConfigs.
         */
        config?: 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.
         */
        displayName?: 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]*[a-z0-9])?`.  * Label
         * values must be between 0 and 63 characters long and must conform    to
         * the regular expression `([a-z]([-a-z0-9]*[a-z0-9])?)?`.  * 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.
         */
        labels?: {
            [key: string]: 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]`. The final segment of
         * the name must be between 6 and 30 characters in length.
         */
        name?: string;
        /**
         * Required. The number of nodes allocated to this instance. This may be
         * zero in API responses for instances that are not yet in state `READY`.
         * See [the
         * documentation](https://cloud.google.com/spanner/docs/instances#node_count)
         * for more information about nodes.
         */
        nodeCount?: number;
        /**
         * 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`.
         */
        state?: string;
    }
    /**
     * A possible configuration for a Cloud Spanner instance. Configurations
     * define the geographic placement of nodes and their replication.
     */
    interface Schema$InstanceConfig {
        /**
         * The name of this instance configuration as it appears in UIs.
         */
        displayName?: string;
        /**
         * A unique identifier for the instance configuration.  Values are of the
         * form `projects/<project>/instanceConfigs/a-z*`
         */
        name?: string;
    }
    /**
     * KeyRange represents a range of rows in a table or index.  A range has a
     * start key and an end key. These keys can be open or closed, indicating if
     * the range includes rows with that key.  Keys are represented by lists,
     * where the ith value in the list corresponds to the ith component of the
     * table or index primary key. Individual values are encoded as described
     * here.  For example, consider the following table definition:      CREATE
     * TABLE UserEvents (       UserName STRING(MAX),       EventDate STRING(10)
     * ) PRIMARY KEY(UserName, EventDate);  The following keys name rows in this
     * table:      "Bob", "2014-09-23"  Since the `UserEvents`
     * table's `PRIMARY KEY` clause names two columns, each `UserEvents` key
     * has two elements; the first is the `UserName`, and the second is the
     * `EventDate`.  Key ranges with multiple components are interpreted
     * lexicographically by component using the table or index key's declared
     * sort order. For example, the following range returns all events for user
     * `"Bob"` that occurred in the year 2015: "start_closed":
     * ["Bob", "2015-01-01"]     "end_closed":
     * ["Bob", "2015-12-31"]  Start and end keys can omit
     * trailing key components. This affects the inclusion and exclusion of rows
     * that exactly match the provided key components: if the key is closed, then
     * rows that exactly match the provided components are included; if the key is
     * open, then rows that exactly match are not included.  For example, the
     * following range includes all events for `"Bob"` that occurred
     * during and after the year 2000:      "start_closed":
     * ["Bob", "2000-01-01"]     "end_closed":
     * ["Bob"]  The next example retrieves all events for
     * `"Bob"`:      "start_closed": ["Bob"]
     * "end_closed": ["Bob"]  To retrieve events before the
     * year 2000:      "start_closed": ["Bob"]
     * "end_open": ["Bob", "2000-01-01"]  The
     * following range includes all rows in the table: "start_closed":
     * []     "end_closed": []  This range returns all users whose
     * `UserName` begins with any character from A to C: "start_closed":
     * ["A"]     "end_open": ["D"]  This range
     * returns all users whose `UserName` begins with B: "start_closed":
     * ["B"]     "end_open": ["C"]  Key ranges honor
     * column sort order. For example, suppose a table is defined as follows:
     * CREATE TABLE DescendingSortedTable {       Key INT64,       ...     )
     * PRIMARY KEY(Key DESC);  The following range retrieves all rows with key
     * values between 1 and 100 inclusive:      "start_closed":
     * ["100"]     "end_closed": ["1"]  Note that
     * 100 is passed as the start, and 1 is passed as the end, because `Key` is a
     * descending column in the schema.
     */
    interface Schema$KeyRange {
        /**
         * If the end is closed, then the range includes all rows whose first
         * `len(end_closed)` key columns exactly match `end_closed`.
         */
        endClosed?: any[];
        /**
         * If the end is open, then the range excludes rows whose first
         * `len(end_open)` key columns exactly match `end_open`.
         */
        endOpen?: any[];
        /**
         * If the start is closed, then the range includes all rows whose first
         * `len(start_closed)` key columns exactly match `start_closed`.
         */
        startClosed?: any[];
        /**
         * If the start is open, then the range excludes rows whose first
         * `len(start_open)` key columns exactly match `start_open`.
         */
        startOpen?: any[];
    }
    /**
     * `KeySet` defines a collection of Cloud Spanner keys and/or key ranges. All
     * the keys are expected to be in the same table or index. The keys need not
     * be sorted in any particular way.  If the same key is specified multiple
     * times in the set (for example if two ranges, two keys, or a key and a range
     * overlap), Cloud Spanner behaves as if the key were only specified once.
     */
    interface Schema$KeySet {
        /**
         * For convenience `all` can be set to `true` to indicate that this `KeySet`
         * matches all keys in the table or index. Note that any keys specified in
         * `keys` or `ranges` are only yielded once.
         */
        all?: boolean;
        /**
         * A list of specific keys. Entries in `keys` should have exactly as many
         * elements as there are columns in the primary or index key with which this
         * `KeySet` is used.  Individual key values are encoded as described here.
         */
        keys?: any[][];
        /**
         * A list of key ranges. See KeyRange for more information about key range
         * specifications.
         */
        ranges?: Schema$KeyRange[];
    }
    /**
     * The response for ListDatabases.
     */
    interface Schema$ListDatabasesResponse {
        /**
         * Databases that matched the request.
         */
        databases?: Schema$Database[];
        /**
         * `next_page_token` can be sent in a subsequent ListDatabases call to fetch
         * more of the matching databases.
         */
        nextPageToken?: string;
    }
    /**
     * The response for ListInstanceConfigs.
     */
    interface Schema$ListInstanceConfigsResponse {
        /**
         * The list of requested instance configurations.
         */
        instanceConfigs?: Schema$InstanceConfig[];
        /**
         * `next_page_token` can be sent in a subsequent ListInstanceConfigs call to
         * fetch more of the matching instance configurations.
         */
        nextPageToken?: string;
    }
    /**
     * The response for ListInstances.
     */
    interface Schema$ListInstancesResponse {
        /**
         * The list of requested instances.
         */
        instances?: Schema$Instance[];
        /**
         * `next_page_token` can be sent in a subsequent ListInstances call to fetch
         * more of the matching instances.
         */
        nextPageToken?: string;
    }
    /**
     * The response message for Operations.ListOperations.
     */
    interface Schema$ListOperationsResponse {
        /**
         * The standard List next-page token.
         */
        nextPageToken?: string;
        /**
         * A list of operations that matches the specified filter in the request.
         */
        operations?: Schema$Operation[];
    }
    /**
     * The response for ListSessions.
     */
    interface Schema$ListSessionsResponse {
        /**
         * `next_page_token` can be sent in a subsequent ListSessions call to fetch
         * more of the matching sessions.
         */
        nextPageToken?: string;
        /**
         * The list of requested sessions.
         */
        sessions?: Schema$Session[];
    }
    /**
     * A modification to one or more Cloud Spanner rows.  Mutations can be applied
     * to a Cloud Spanner database by sending them in a Commit call.
     */
    interface Schema$Mutation {
        /**
         * Delete rows from a table. Succeeds whether or not the named rows were
         * present.
         */
        delete?: Schema$Delete;
        /**
         * Insert new rows in a table. If any of the rows already exist, the write
         * or transaction fails with error `ALREADY_EXISTS`.
         */
        insert?: Schema$Write;
        /**
         * Like insert, except that if the row already exists, then its column
         * values are overwritten with the ones provided. Any column values not
         * explicitly written are preserved.
         */
        insertOrUpdate?: Schema$Write;
        /**
         * Like insert, except that if the row already exists, it is deleted, and
         * the column values provided are inserted instead. Unlike insert_or_update,
         * this means any values not explicitly written become `NULL`.
         */
        replace?: Schema$Write;
        /**
         * Update existing rows in a table. If any of the rows does not already
         * exist, the transaction fails with error `NOT_FOUND`.
         */
        update?: Schema$Write;
    }
    /**
     * This resource represents a long-running operation that is the result of a
     * network API call.
     */
    interface Schema$Operation {
        /**
         * If the value is `false`, it means the operation is still in progress. If
         * `true`, the operation is completed, and either `error` or `response` is
         * available.
         */
        done?: boolean;
        /**
         * The error result of the operation in case of failure or cancellation.
         */
        error?: Schema$Status;
        /**
         * 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.
         */
        metadata?: {
            [key: string]: any;
        };
        /**
         * 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`.
         */
        name?: string;
        /**
         * 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`.
         */
        response?: {
            [key: string]: any;
        };
    }
    /**
     * Partial results from a streaming read or SQL query. Streaming reads and SQL
     * queries better tolerate large result sets, large rows, and large values,
     * but are a little trickier to consume.
     */
    interface Schema$PartialResultSet {
        /**
         * If true, then the final value in values is chunked, and must be combined
         * with more values from subsequent `PartialResultSet`s to obtain a complete
         * field value.
         */
        chunkedValue?: boolean;
        /**
         * Metadata about the result set, such as row type information. Only present
         * in the first response.
         */
        metadata?: Schema$ResultSetMetadata;
        /**
         * Streaming calls might be interrupted for a variety of reasons, such as
         * TCP connection loss. If this occurs, the stream of results can be resumed
         * by re-sending the original request and including `resume_token`. Note
         * that executing any other transaction in the same session invalidates the
         * token.
         */
        resumeToken?: string;
        /**
         * Query plan and execution statistics for the statement that produced this
         * streaming result set. These can be requested by setting
         * ExecuteSqlRequest.query_mode and are sent only once with the last
         * response in the stream. This field will also be present in the last
         * response for DML statements.
         */
        stats?: Schema$ResultSetStats;
        /**
         * A streamed result set consists of a stream of values, which might be
         * split into many `PartialResultSet` messages to accommodate large rows
         * and/or large values. Every N complete values defines a row, where N is
         * equal to the number of entries in metadata.row_type.fields.  Most values
         * are encoded based on type as described here.  It is possible that the
         * last value in values is "chunked", meaning that the rest of the
         * value is sent in subsequent `PartialResultSet`(s). This is denoted by the
         * chunked_value field. Two or more chunked values can be merged to form a
         * complete value as follows:    * `bool/number/null`: cannot be chunked   *
         * `string`: concatenate the strings   * `list`: concatenate the lists. If
         * the last element in a list is a     `string`, `list`, or `object`, merge
         * it with the first element in     the next list by applying these rules
         * recursively.   * `object`: concatenate the (field name, field value)
         * pairs. If a     field name is duplicated, then apply these rules
         * recursively     to merge the field values.  Some examples of merging: #
         * Strings are concatenated.     "foo", "bar" =>
         * "foobar"      # Lists of non-strings are concatenated.     [2,
         * 3], [4] => [2, 3, 4]      # Lists are concatenated, but the last and
         * first elements are merged     # because they are strings. ["a",
         * "b"], ["c", "d"] => ["a",
         * "bc", "d"]      # Lists are concatenated, but the
         * last and first elements are merged     # because they are lists.
         * Recursively, the last and first elements     # of the inner lists are
         * merged because they are strings.     ["a", ["b",
         * "c"]], [["d"], "e"] => ["a",
         * ["b", "cd"], "e"]      # Non-overlapping
         * object fields are combined.     {"a": "1"},
         * {"b": "2"} => {"a": "1",
         * "b": 2"}      # Overlapping object fields are merged.
         * {"a": "1"}, {"a": "2"} =>
         * {"a": "12"}      # Examples of merging objects
         * containing lists of strings.     {"a": ["1"]},
         * {"a": ["2"]} => {"a": ["12"]}
         * For a more complete example, suppose a streaming SQL query is yielding a
         * result set whose rows contain a single string field. The following
         * `PartialResultSet`s might be yielded:      {       "metadata":
         * { ... }       "values": ["Hello", "W"]
         * "chunked_value": true       "resume_token":
         * "Af65..."     }     {       "values":
         * ["orl"]       "chunked_value": true
         * "resume_token": "Bqp2..."     }     {
         * "values": ["d"]       "resume_token":
         * "Zx1B..."     }  This sequence of `PartialResultSet`s encodes
         * two rows, one containing the field value `"Hello"`, and a
         * second containing the field value `"World" = "W" +
         * "orl" + "d"`.
         */
        values?: any[];
    }
    /**
     * Information returned for each partition returned in a PartitionResponse.
     */
    interface Schema$Partition {
        /**
         * This token can be passed to Read, StreamingRead, ExecuteSql, or
         * ExecuteStreamingSql requests to restrict the results to those identified
         * by this partition token.
         */
        partitionToken?: string;
    }
    /**
     * Message type to initiate a Partitioned DML transaction.
     */
    interface Schema$PartitionedDml {
    }
    /**
     * Options for a PartitionQueryRequest and PartitionReadRequest.
     */
    interface Schema$PartitionOptions {
        /**
         * **Note:** This hint is currently ignored by PartitionQuery and
         * PartitionRead requests.  The desired maximum number of partitions to
         * return.  For example, this may be set to the number of workers available.
         * The default for this option is currently 10,000. The maximum value is
         * currently 200,000.  This is only a hint.  The actual number of partitions
         * returned may be smaller or larger than this maximum count request.
         */
        maxPartitions?: string;
        /**
         * **Note:** This hint is currently ignored by PartitionQuery and
         * PartitionRead requests.  The desired data size for each partition
         * generated.  The default for this option is currently 1 GiB.  This is only
         * a hint. The actual size of each partition may be smaller or larger than
         * this size request.
         */
        partitionSizeBytes?: string;
    }
    /**
     * The request for PartitionQuery
     */
    interface Schema$PartitionQueryRequest {
        /**
         * The SQL query string can contain parameter placeholders. A parameter
         * placeholder consists of `'@'` followed by the parameter name.
         * Parameter names consist of any combination of letters, numbers, and
         * underscores.  Parameters can appear anywhere that a literal value is
         * expected.  The same parameter name can be used more than once, for
         * example:   `"WHERE id > @msg_id AND id < @msg_id + 100"`
         * It is an error to execute an SQL query with unbound parameters. Parameter
         * values are specified using `params`, which is a JSON object whose keys
         * are parameter names, and whose values are the corresponding parameter
         * values.
         */
        params?: {
            [key: string]: any;
        };
        /**
         * It is not always possible for Cloud Spanner to infer the right SQL type
         * from a JSON value.  For example, values of type `BYTES` and values of
         * type `STRING` both appear in params as JSON strings.  In these cases,
         * `param_types` can be used to specify the exact SQL type for some or all
         * of the SQL query parameters. See the definition of Type for more
         * information about SQL types.
         */
        paramTypes?: {
            [key: string]: Schema$Type;
        };
        /**
         * Additional options that affect how many partitions are created.
         */
        partitionOptions?: Schema$PartitionOptions;
        /**
         * The query request to generate partitions for. The request will fail if
         * the query is not root partitionable. The query plan of a root
         * partitionable query has a single distributed union operator. A
         * distributed union operator conceptually divides one or more tables into
         * multiple splits, remotely evaluates a subquery independently on each
         * split, and then unions all results.  This must not contain DML commands,
         * such as INSERT, UPDATE, or DELETE. Use ExecuteStreamingSql with a
         * PartitionedDml transaction for large, partition-friendly DML operations.
         */
        sql?: string;
        /**
         * Read only snapshot transactions are supported, read/write and single use
         * transactions are not.
         */
        transaction?: Schema$TransactionSelector;
    }
    /**
     * The request for PartitionRead
     */
    interface Schema$PartitionReadRequest {
        /**
         * The columns of table to be returned for each row matching this request.
         */
        columns?: string[];
        /**
         * If non-empty, the name of an index on table. This index is used instead
         * of the table primary key when interpreting key_set and sorting result
         * rows. See key_set for further information.
         */
        index?: string;
        /**
         * Required. `key_set` identifies the rows to be yielded. `key_set` names
         * the primary keys of the rows in table to be yielded, unless index is
         * present. If index is present, then key_set instead names index keys in
         * index.  It is not an error for the `key_set` to name rows that do not
         * exist in the database. Read yields nothing for nonexistent rows.
         */
        keySet?: Schema$KeySet;
        /**
         * Additional options that affect how many partitions are created.
         */
        partitionOptions?: Schema$PartitionOptions;
        /**
         * Required. The name of the table in the database to be read.
         */
        table?: string;
        /**
         * Read only snapshot transactions are supported, read/write and single use
         * transactions are not.
         */
        transaction?: Schema$TransactionSelector;
    }
    /**
     * The response for PartitionQuery or PartitionRead
     */
    interface Schema$PartitionResponse {
        /**
         * Partitions created by this request.
         */
        partitions?: Schema$Partition[];
        /**
         * Transaction created by this request.
         */
        transaction?: Schema$Transaction;
    }
    /**
     * Node information for nodes appearing in a QueryPlan.plan_nodes.
     */
    interface Schema$PlanNode {
        /**
         * List of child node `index`es and their relationship to this parent.
         */
        childLinks?: Schema$ChildLink[];
        /**
         * The display name for the node.
         */
        displayName?: string;
        /**
         * The execution statistics associated with the node, contained in a group
         * of key-value pairs. Only present if the plan was returned as a result of
         * a profile query. For example, number of executions, number of rows/time
         * per execution etc.
         */
        executionStats?: {
            [key: string]: any;
        };
        /**
         * The `PlanNode`'s index in node list.
         */
        index?: number;
        /**
         * Used to determine the type of node. May be needed for visualizing
         * different kinds of nodes differently. For example, If the node is a
         * SCALAR node, it will have a condensed representation which can be used to
         * directly embed a description of the node in its parent.
         */
        kind?: string;
        /**
         * Attributes relevant to the node contained in a group of key-value pairs.
         * For example, a Parameter Reference node could have the following
         * information in its metadata:      { "parameter_reference":
         * "param1",       "parameter_type": "array" }
         */
        metadata?: {
            [key: string]: any;
        };
        /**
         * Condensed representation for SCALAR nodes.
         */
        shortRepresentation?: Schema$ShortRepresentation;
    }
    /**
     * 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.  **JSON 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"]         }       ]     }  **YAML
     * Example**      bindings:     - members:       - user:mike@example.com -
     * group:admins@example.com       - domain:google.com       -
     * serviceAccount:my-other-app@appspot.gserviceaccount.com       role:
     * roles/owner     - members:       - user:sean@example.com       role:
     * roles/viewer   For a description of IAM and its features, see the [IAM
     * developer's guide](https://cloud.google.com/iam/docs).
     */
    interface Schema$Policy {
        /**
         * Associates a list of `members` to a `role`. `bindings` with no members
         * will result in an error.
         */
        bindings?: Schema$Binding[];
        /**
         * `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.
         */
        etag?: string;
        /**
         * Deprecated.
         */
        version?: number;
    }
    /**
     * Contains an ordered list of nodes appearing in the query plan.
     */
    interface Schema$QueryPlan {
        /**
         * The nodes in the query plan. Plan nodes are returned in pre-order
         * starting with the plan root. Each PlanNode's `id` corresponds to its
         * index in `plan_nodes`.
         */
        planNodes?: Schema$PlanNode[];
    }
    /**
     * Message type to initiate a read-only transaction.
     */
    interface Schema$ReadOnly {
        /**
         * Executes all reads at a timestamp that is `exact_staleness` old. The
         * timestamp is chosen soon after the read is started.  Guarantees that all
         * writes that have committed more than the specified number of seconds ago
         * are visible. Because Cloud Spanner chooses the exact timestamp, this mode
         * works even if the client's local clock is substantially skewed from
         * Cloud Spanner commit timestamps.  Useful for reading at nearby replicas
         * without the distributed timestamp negotiation overhead of
         * `max_staleness`.
         */
        exactStaleness?: string;
        /**
         * Read data at a timestamp >= `NOW - max_staleness` seconds. Guarantees
         * that all writes that have committed more than the specified number of
         * seconds ago are visible. Because Cloud Spanner chooses the exact
         * timestamp, this mode works even if the client's local clock is
         * substantially skewed from Cloud Spanner commit timestamps.  Useful for
         * reading the freshest data available at a nearby replica, while bounding
         * the possible staleness if the local replica has fallen behind.  Note that
         * this option can only be used in single-use transactions.
         */
        maxStaleness?: string;
        /**
         * Executes all reads at a timestamp >= `min_read_timestamp`.  This is
         * useful for requesting fresher data than some previous read, or data that
         * is fresh enough to observe the effects of some previously committed
         * transaction whose timestamp is known.  Note that this option can only be
         * used in single-use transactions.  A timestamp in RFC3339 UTC
         * \"Zulu\" format, accurate to nanoseconds. Example:
         * `"2014-10-02T15:01:23.045123456Z"`.
         */
        minReadTimestamp?: string;
        /**
         * Executes all reads at the given timestamp. Unlike other modes, reads at a
         * specific timestamp are repeatable; the same read at the same timestamp
         * always returns the same data. If the timestamp is in the future, the read
         * will block until the specified timestamp, modulo the read's deadline.
         * Useful for large scale consistent reads such as mapreduces, or for
         * coordinating many reads against a consistent snapshot of the data.  A
         * timestamp in RFC3339 UTC \"Zulu\" format, accurate to
         * nanoseconds. Example: `"2014-10-02T15:01:23.045123456Z"`.
         */
        readTimestamp?: string;
        /**
         * If true, the Cloud Spanner-selected read timestamp is included in the
         * Transaction message that describes the transaction.
         */
        returnReadTimestamp?: boolean;
        /**
         * Read at a timestamp where all previously committed transactions are
         * visible.
         */
        strong?: boolean;
    }
    /**
     * The request for Read and StreamingRead.
     */
    interface Schema$ReadRequest {
        /**
         * The columns of table to be returned for each row matching this request.
         */
        columns?: string[];
        /**
         * If non-empty, the name of an index on table. This index is used instead
         * of the table primary key when interpreting key_set and sorting result
         * rows. See key_set for further information.
         */
        index?: string;
        /**
         * Required. `key_set` identifies the rows to be yielded. `key_set` names
         * the primary keys of the rows in table to be yielded, unless index is
         * present. If index is present, then key_set instead names index keys in
         * index.  If the partition_token field is empty, rows are yielded in table
         * primary key order (if index is empty) or index key order (if index is
         * non-empty).  If the partition_token field is not empty, rows will be
         * yielded in an unspecified order.  It is not an error for the `key_set` to
         * name rows that do not exist in the database. Read yields nothing for
         * nonexistent rows.
         */
        keySet?: Schema$KeySet;
        /**
         * If greater than zero, only the first `limit` rows are yielded. If `limit`
         * is zero, the default is no limit. A limit cannot be specified if
         * `partition_token` is set.
         */
        limit?: string;
        /**
         * If present, results will be restricted to the specified partition
         * previously created using PartitionRead().    There must be an exact match
         * for the values of fields common to this message and the
         * PartitionReadRequest message used to create this partition_token.
         */
        partitionToken?: string;
        /**
         * If this request is resuming a previously interrupted read, `resume_token`
         * should be copied from the last PartialResultSet yielded before the
         * interruption. Doing this enables the new read to resume where the last
         * read left off. The rest of the request parameters must exactly match the
         * request that yielded this token.
         */
        resumeToken?: string;
        /**
         * Required. The name of the table in the database to be read.
         */
        table?: string;
        /**
         * The transaction to use. If none is provided, the default is a temporary
         * read-only transaction with strong concurrency.
         */
        transaction?: Schema$TransactionSelector;
    }
    /**
     * Message type to initiate a read-write transaction. Currently this
     * transaction type has no options.
     */
    interface Schema$ReadWrite {
    }
    /**
     * Results from Read or ExecuteSql.
     */
    interface Schema$ResultSet {
        /**
         * Metadata about the result set, such as row type information.
         */
        metadata?: Schema$ResultSetMetadata;
        /**
         * Each element in `rows` is a row whose format is defined by
         * metadata.row_type. The ith element in each row matches the ith field in
         * metadata.row_type. Elements are encoded based on type as described here.
         */
        rows?: any[][];
        /**
         * Query plan and execution statistics for the SQL statement that produced
         * this result set. These can be requested by setting
         * ExecuteSqlRequest.query_mode. DML statements always produce stats
         * containing the number of rows modified, unless executed using the
         * ExecuteSqlRequest.QueryMode.PLAN ExecuteSqlRequest.query_mode. Other
         * fields may or may not be populated, based on the
         * ExecuteSqlRequest.query_mode.
         */
        stats?: Schema$ResultSetStats;
    }
    /**
     * Metadata about a ResultSet or PartialResultSet.
     */
    interface Schema$ResultSetMetadata {
        /**
         * Indicates the field names and types for the rows in the result set.  For
         * example, a SQL query like `"SELECT UserId, UserName FROM
         * Users"` could return a `row_type` value like: "fields": [
         * { "name": "UserId", "type": {
         * "code": "INT64" } },       { "name":
         * "UserName", "type": { "code":
         * "STRING" } },     ]
         */
        rowType?: Schema$StructType;
        /**
         * If the read or SQL query began a transaction as a side-effect, the
         * information about the new transaction is yielded here.
         */
        transaction?: Schema$Transaction;
    }
    /**
     * Additional statistics about a ResultSet or PartialResultSet.
     */
    interface Schema$ResultSetStats {
        /**
         * QueryPlan for the query associated with this result.
         */
        queryPlan?: Schema$QueryPlan;
        /**
         * Aggregated statistics from the execution of the query. Only present when
         * the query is profiled. For example, a query could return the statistics
         * as follows:      {       "rows_returned": "3",
         * "elapsed_time": "1.22 secs", "cpu_time":
         * "1.19 secs"     }
         */
        queryStats?: {
            [key: string]: any;
        };
        /**
         * Standard DML returns an exact count of rows that were modified.
         */
        rowCountExact?: string;
        /**
         * Partitioned DML does not offer exactly-once semantics, so it returns a
         * lower bound of the rows modified.
         */
        rowCountLowerBound?: string;
    }
    /**
     * The request for Rollback.
     */
    interface Schema$RollbackRequest {
        /**
         * Required. The transaction to roll back.
         */
        transactionId?: string;
    }
    /**
     * A session in the Cloud Spanner API.
     */
    interface Schema$Session {
        /**
         * Output only. The approximate timestamp when the session is last used. It
         * is typically earlier than the actual last use time.
         */
        approximateLastUseTime?: string;
        /**
         * Output only. The timestamp when the session is created.
         */
        createTime?: string;
        /**
         * The labels for the session.   * Label keys must be between 1 and 63
         * characters long and must conform to    the following regular expression:
         * `[a-z]([-a-z0-9]*[a-z0-9])?`.  * Label values must be between 0 and 63
         * characters long and must conform    to the regular expression
         * `([a-z]([-a-z0-9]*[a-z0-9])?)?`.  * No more than 64 labels can be
         * associated with a given session.  See https://goo.gl/xmQnxf for more
         * information on and examples of labels.
         */
        labels?: {
            [key: string]: string;
        };
        /**
         * The name of the session. This is always system-assigned; values provided
         * when creating a session are ignored.
         */
        name?: string;
    }
    /**
     * Request message for `SetIamPolicy` method.
     */
    interface Schema$SetIamPolicyRequest {
        /**
         * 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.
         */
        policy?: Schema$Policy;
    }
    /**
     * Condensed representation of a node and its subtree. Only present for
     * `SCALAR` PlanNode(s).
     */
    interface Schema$ShortRepresentation {
        /**
         * A string representation of the expression subtree rooted at this node.
         */
        description?: string;
        /**
         * A mapping of (subquery variable name) -> (subquery node id) for cases
         * where the `description` string of this node references a `SCALAR`
         * subquery contained in the expression subtree rooted at this node. The
         * referenced `SCALAR` subquery may not necessarily be a direct child of
         * this node.
         */
        subqueries?: {
            [key: string]: number;
        };
    }
    /**
     * The `Status` type defines a logical error model that is suitable for
     * different 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` that 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.  - 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.
     */
    interface Schema$Status {
        /**
         * The status code, which should be an enum value of google.rpc.Code.
         */
        code?: number;
        /**
         * A list of messages that carry the error details.  There is a common set
         * of message types for APIs to use.
         */
        details?: Array<{
            [key: string]: any;
        }>;
        /**
         * A developer-facing error message, which should be in English. Any
         * user-facing error message should be localized and sent in the
         * google.rpc.Status.details field, or localized by the client.
         */
        message?: string;
    }
    /**
     * `StructType` defines the fields of a STRUCT type.
     */
    interface Schema$StructType {
        /**
         * The list of fields that make up this struct. Order is significant,
         * because values of this struct type are represented as lists, where the
         * order of field values matches the order of fields in the StructType. In
         * turn, the order of fields matches the order of columns in a read request,
         * or the order of fields in the `SELECT` clause of a query.
         */
        fields?: Schema$Field[];
    }
    /**
     * Request message for `TestIamPermissions` method.
     */
    interface Schema$TestIamPermissionsRequest {
        /**
         * REQUIRED: The set of permissions to check for &#39;resource&#39;.
         * Permissions with wildcards (such as &#39;*&#39;, &#39;spanner.*&#39;,
         * &#39;spanner.instances.*&#39;) are not allowed.
         */
        permissions?: string[];
    }
    /**
     * Response message for `TestIamPermissions` method.
     */
    interface Schema$TestIamPermissionsResponse {
        /**
         * A subset of `TestPermissionsRequest.permissions` that the caller is
         * allowed.
         */
        permissions?: string[];
    }
    /**
     * A transaction.
     */
    interface Schema$Transaction {
        /**
         * `id` may be used to identify the transaction in subsequent Read,
         * ExecuteSql, Commit, or Rollback calls.  Single-use read-only transactions
         * do not have IDs, because single-use transactions do not support multiple
         * requests.
         */
        id?: string;
        /**
         * For snapshot read-only transactions, the read timestamp chosen for the
         * transaction. Not returned by default: see
         * TransactionOptions.ReadOnly.return_read_timestamp.  A timestamp in
         * RFC3339 UTC \&quot;Zulu\&quot; format, accurate to nanoseconds. Example:
         * `&quot;2014-10-02T15:01:23.045123456Z&quot;`.
         */
        readTimestamp?: string;
    }
    /**
     * # Transactions   Each session can have at most one active transaction at a
     * time. After the active transaction is completed, the session can
     * immediately be re-used for the next transaction. It is not necessary to
     * create a new session for each transaction.  # Transaction Modes  Cloud
     * Spanner supports three transaction modes:    1. Locking read-write. This
     * type of transaction is the only way      to write data into Cloud Spanner.
     * These transactions rely on      pessimistic locking and, if necessary,
     * two-phase commit.      Locking read-write transactions may abort, requiring
     * the      application to retry.    2. Snapshot read-only. This transaction
     * type provides guaranteed      consistency across several reads, but does
     * not allow      writes. Snapshot read-only transactions can be configured to
     * read at timestamps in the past. Snapshot read-only      transactions do not
     * need to be committed.    3. Partitioned DML. This type of transaction is
     * used to execute      a single Partitioned DML statement. Partitioned DML
     * partitions      the key space and runs the DML statement over each
     * partition      in parallel using separate, internal transactions that
     * commit      independently. Partitioned DML transactions do not need to be
     * committed.  For transactions that only read, snapshot read-only
     * transactions provide simpler semantics and are almost always faster. In
     * particular, read-only transactions do not take locks, so they do not
     * conflict with read-write transactions. As a consequence of not taking
     * locks, they also do not abort, so retry loops are not needed.  Transactions
     * may only read/write data in a single database. They may, however,
     * read/write data in different tables within that database.  ## Locking
     * Read-Write Transactions  Locking transactions may be used to atomically
     * read-modify-write data anywhere in a database. This type of transaction is
     * externally consistent.  Clients should attempt to minimize the amount of
     * time a transaction is active. Faster transactions commit with higher
     * probability and cause less contention. Cloud Spanner attempts to keep read
     * locks active as long as the transaction continues to do reads, and the
     * transaction has not been terminated by Commit or Rollback.  Long periods of
     * inactivity at the client may cause Cloud Spanner to release a
     * transaction&#39;s locks and abort it.  Conceptually, a read-write
     * transaction consists of zero or more reads or SQL statements followed by
     * Commit. At any time before Commit, the client can send a Rollback request
     * to abort the transaction.  ### Semantics  Cloud Spanner can commit the
     * transaction if all read locks it acquired are still valid at commit time,
     * and it is able to acquire write locks for all writes. Cloud Spanner can
     * abort the transaction for any reason. If a commit attempt returns
     * `ABORTED`, Cloud Spanner guarantees that the transaction has not modified
     * any user data in Cloud Spanner.  Unless the transaction commits, Cloud
     * Spanner makes no guarantees about how long the transaction&#39;s locks were
     * held for. It is an error to use Cloud Spanner locks for any sort of mutual
     * exclusion other than between Cloud Spanner transactions themselves.  ###
     * Retrying Aborted Transactions  When a transaction aborts, the application
     * can choose to retry the whole transaction again. To maximize the chances of
     * successfully committing the retry, the client should execute the retry in
     * the same session as the original attempt. The original session&#39;s lock
     * priority increases with each consecutive abort, meaning that each attempt
     * has a slightly better chance of success than the previous.  Under some
     * circumstances (e.g., many transactions attempting to modify the same
     * row(s)), a transaction can abort many times in a short period before
     * successfully committing. Thus, it is not a good idea to cap the number of
     * retries a transaction can attempt; instead, it is better to limit the total
     * amount of wall time spent retrying.  ### Idle Transactions  A transaction
     * is considered idle if it has no outstanding reads or SQL queries and has
     * not started a read or SQL query within the last 10 seconds. Idle
     * transactions can be aborted by Cloud Spanner so that they don&#39;t hold on
     * to locks indefinitely. In that case, the commit will fail with error
     * `ABORTED`.  If this behavior is undesirable, periodically executing a
     * simple SQL query in the transaction (e.g., `SELECT 1`) prevents the
     * transaction from becoming idle.  ## Snapshot Read-Only Transactions
     * Snapshot read-only transactions provides a simpler method than locking
     * read-write transactions for doing several consistent reads. However, this
     * type of transaction does not support writes.  Snapshot transactions do not
     * take locks. Instead, they work by choosing a Cloud Spanner timestamp, then
     * executing all reads at that timestamp. Since they do not acquire locks,
     * they do not block concurrent read-write transactions.  Unlike locking
     * read-write transactions, snapshot read-only transactions never abort. They
     * can fail if the chosen read timestamp is garbage collected; however, the
     * default garbage collection policy is generous enough that most applications
     * do not need to worry about this in practice.  Snapshot read-only
     * transactions do not need to call Commit or Rollback (and in fact are not
     * permitted to do so).  To execute a snapshot transaction, the client
     * specifies a timestamp bound, which tells Cloud Spanner how to choose a read
     * timestamp.  The types of timestamp bound are:    - Strong (the default). -
     * Bounded staleness.   - Exact staleness.  If the Cloud Spanner database to
     * be read is geographically distributed, stale read-only transactions can
     * execute more quickly than strong or read-write transaction, because they
     * are able to execute far from the leader replica.  Each type of timestamp
     * bound is discussed in detail below.  ### Strong  Strong reads are
     * guaranteed to see the effects of all transactions that have committed
     * before the start of the read. Furthermore, all rows yielded by a single
     * read are consistent with each other -- if any part of the read observes a
     * transaction, all parts of the read see the transaction.  Strong reads are
     * not repeatable: two consecutive strong read-only transactions might return
     * inconsistent results if there are concurrent writes. If consistency across
     * reads is required, the reads should be executed within a transaction or at
     * an exact read timestamp.  See TransactionOptions.ReadOnly.strong.  ###
     * Exact Staleness  These timestamp bounds execute reads at a user-specified
     * timestamp. Reads at a timestamp are guaranteed to see a consistent prefix
     * of the global transaction history: they observe modifications done by all
     * transactions with a commit timestamp &lt;= the read timestamp, and observe
     * none of the modifications done by transactions with a larger commit
     * timestamp. They will block until all conflicting transactions that may be
     * assigned commit timestamps &lt;= the read timestamp have finished.  The
     * timestamp can either be expressed as an absolute Cloud Spanner commit
     * timestamp or a staleness relative to the current time.  These modes do not
     * require a &quot;negotiation phase&quot; to pick a timestamp. As a result,
     * they execute slightly faster than the equivalent boundedly stale
     * concurrency modes. On the other hand, boundedly stale reads usually return
     * fresher results.  See TransactionOptions.ReadOnly.read_timestamp and
     * TransactionOptions.ReadOnly.exact_staleness.  ### Bounded Staleness Bounded
     * staleness modes allow Cloud Spanner to pick the read timestamp, subject to
     * a user-provided staleness bound. Cloud Spanner chooses the newest timestamp
     * within the staleness bound that allows execution of the reads at the
     * closest available replica without blocking.  All rows yielded are
     * consistent with each other -- if any part of the read observes a
     * transaction, all parts of the read see the transaction. Boundedly stale
     * reads are not repeatable: two stale reads, even if they use the same
     * staleness bound, can execute at different timestamps and thus return
     * inconsistent results.  Boundedly stale reads execute in two phases: the
     * first phase negotiates a timestamp among all replicas needed to serve the
     * read. In the second phase, reads are executed at the negotiated timestamp.
     * As a result of the two phase execution, bounded staleness reads are usually
     * a little slower than comparable exact staleness reads. However, they are
     * typically able to return fresher results, and are more likely to execute at
     * the closest replica.  Because the timestamp negotiation requires up-front
     * knowledge of which rows will be read, it can only be used with single-use
     * read-only transactions.  See TransactionOptions.ReadOnly.max_staleness and
     * TransactionOptions.ReadOnly.min_read_timestamp.  ### Old Read Timestamps
     * and Garbage Collection  Cloud Spanner continuously garbage collects deleted
     * and overwritten data in the background to reclaim storage space. This
     * process is known as &quot;version GC&quot;. By default, version GC reclaims
     * versions after they are one hour old. Because of this, Cloud Spanner cannot
     * perform reads at read timestamps more than one hour in the past. This
     * restriction also applies to in-progress reads and/or SQL queries whose
     * timestamp become too old while executing. Reads and SQL queries with
     * too-old read timestamps fail with the error `FAILED_PRECONDITION`.  ##
     * Partitioned DML Transactions  Partitioned DML transactions are used to
     * execute DML statements with a different execution strategy that provides
     * different, and often better, scalability properties for large, table-wide
     * operations than DML in a ReadWrite transaction. Smaller scoped statements,
     * such as an OLTP workload, should prefer using ReadWrite transactions.
     * Partitioned DML partitions the keyspace and runs the DML statement on each
     * partition in separate, internal transactions. These transactions commit
     * automatically when complete, and run independently from one another.  To
     * reduce lock contention, this execution strategy only acquires read locks on
     * rows that match the WHERE clause of the statement. Additionally, the
     * smaller per-partition transactions hold locks for less time.  That said,
     * Partitioned DML is not a drop-in replacement for standard DML used in
     * ReadWrite transactions.   - The DML statement must be fully-partitionable.
     * Specifically, the statement    must be expressible as the union of many
     * statements which each access only    a single row of the table.   - The
     * statement is not applied atomically to all rows of the table. Rather, the
     * statement is applied atomically to partitions of the table, in independent
     * transactions. Secondary index rows are updated atomically    with the base
     * table rows.   - Partitioned DML does not guarantee exactly-once execution
     * semantics    against a partition. The statement will be applied at least
     * once to each    partition. It is strongly recommended that the DML
     * statement should be    idempotent to avoid unexpected results. For
     * instance, it is potentially    dangerous to run a statement such as `UPDATE
     * table SET column = column + 1` as it could be run multiple times    against
     * some rows.   - The partitions are committed automatically - there is no
     * support for    Commit or Rollback. If the call returns an error, or if the
     * client issuing    the ExecuteSql call dies, it is possible that some rows
     * had the statement    executed on them successfully. It is also possible
     * that statement was    never executed against other rows.   - Partitioned
     * DML transactions may only contain the execution of a single    DML
     * statement via ExecuteSql or ExecuteStreamingSql.   - If any error is
     * encountered during the execution of the partitioned DML    operation (for
     * instance, a UNIQUE INDEX violation, division by zero, or a    value that
     * cannot be stored due to schema constraints), then the    operation is
     * stopped at that point and an error is returned. It is    possible that at
     * this point, some partitions have been committed (or even    committed
     * multiple times), and other partitions have not been run at all.  Given the
     * above, Partitioned DML is good fit for large, database-wide, operations
     * that are idempotent, such as deleting old rows from a very large table.
     */
    interface Schema$TransactionOptions {
        /**
         * Partitioned DML transaction.  Authorization to begin a Partitioned DML
         * transaction requires `spanner.databases.beginPartitionedDmlTransaction`
         * permission on the `session` resource.
         */
        partitionedDml?: Schema$PartitionedDml;
        /**
         * Transaction will not write.  Authorization to begin a read-only
         * transaction requires `spanner.databases.beginReadOnlyTransaction`
         * permission on the `session` resource.
         */
        readOnly?: Schema$ReadOnly;
        /**
         * Transaction may write.  Authorization to begin a read-write transaction
         * requires `spanner.databases.beginOrRollbackReadWriteTransaction`
         * permission on the `session` resource.
         */
        readWrite?: Schema$ReadWrite;
    }
    /**
     * This message is used to select the transaction in which a Read or
     * ExecuteSql call runs.  See TransactionOptions for more information about
     * transactions.
     */
    interface Schema$TransactionSelector {
        /**
         * Begin a new transaction and execute this read or SQL query in it. The
         * transaction ID of the new transaction is returned in
         * ResultSetMetadata.transaction, which is a Transaction.
         */
        begin?: Schema$TransactionOptions;
        /**
         * Execute the read or SQL query in a previously-started transaction.
         */
        id?: string;
        /**
         * Execute the read or SQL query in a temporary transaction. This is the
         * most efficient way to execute a transaction that consists of a single SQL
         * query.
         */
        singleUse?: Schema$TransactionOptions;
    }
    /**
     * `Type` indicates the type of a Cloud Spanner value, as might be stored in a
     * table cell or returned from an SQL query.
     */
    interface Schema$Type {
        /**
         * If code == ARRAY, then `array_element_type` is the type of the array
         * elements.
         */
        arrayElementType?: Schema$Type;
        /**
         * Required. The TypeCode for this type.
         */
        code?: string;
        /**
         * If code == STRUCT, then `struct_type` provides type information for the
         * struct&#39;s fields.
         */
        structType?: Schema$StructType;
    }
    /**
     * Metadata type for the operation returned by UpdateDatabaseDdl.
     */
    interface Schema$UpdateDatabaseDdlMetadata {
        /**
         * Reports the commit timestamps of all statements that have succeeded so
         * far, where `commit_timestamps[i]` is the commit timestamp for the
         * statement `statements[i]`.
         */
        commitTimestamps?: string[];
        /**
         * The database being modified.
         */
        database?: string;
        /**
         * For an update this list contains all the statements. For an individual
         * statement, this list contains only that statement.
         */
        statements?: string[];
    }
    /**
     * Enqueues the given DDL statements to be applied, in order but not
     * necessarily all at once, to the database schema at some point (or points)
     * in the future. The server checks that the statements are executable
     * (syntactically valid, name tables that exist, etc.) before enqueueing them,
     * but they may still fail upon later execution (e.g., if a statement from
     * another batch of statements is applied first and it conflicts in some way,
     * or if there is some data-related problem like a `NULL` value in a column to
     * which `NOT NULL` would be added). If a statement fails, all subsequent
     * statements in the batch are automatically cancelled.  Each batch of
     * statements is assigned a name which can be used with the Operations API to
     * monitor progress. See the operation_id field for more details.
     */
    interface Schema$UpdateDatabaseDdlRequest {
        /**
         * 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:
         * `&lt;database&gt;/operations/&lt;operation_id&gt;`.  `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`.
         */
        operationId?: string;
        /**
         * DDL statements to be applied to the database.
         */
        statements?: string[];
    }
    /**
     * Metadata type for the operation returned by UpdateInstance.
     */
    interface Schema$UpdateInstanceMetadata {
        /**
         * The time at which this operation was cancelled. If set, this operation is
         * in the process of undoing itself (which is guaranteed to succeed) and
         * cannot be cancelled again.
         */
        cancelTime?: string;
        /**
         * The time at which this operation failed or was completed successfully.
         */
        endTime?: string;
        /**
         * The desired end state of the update.
         */
        instance?: Schema$Instance;
        /**
         * The time at which UpdateInstance request was received.
         */
        startTime?: string;
    }
    /**
     * The request for UpdateInstance.
     */
    interface Schema$UpdateInstanceRequest {
        /**
         * Required. A mask specifying which fields in
         * [][google.spanner.admin.instance.v1.UpdateInstanceRequest.instance]
         * should be updated. The field mask must always be specified; this prevents
         * any future fields in [][google.spanner.admin.instance.v1.Instance] from
         * being erased accidentally by clients that do not know about them.
         */
        fieldMask?: string;
        /**
         * Required. The instance to update, which must always include the instance
         * name.  Otherwise, only fields mentioned in
         * [][google.spanner.admin.instance.v1.UpdateInstanceRequest.field_mask]
         * need be included.
         */
        instance?: Schema$Instance;
    }
    /**
     * Arguments to insert, update, insert_or_update, and replace operations.
     */
    interface Schema$Write {
        /**
         * The names of the columns in table to be written.  The list of columns
         * must contain enough columns to allow Cloud Spanner to derive values for
         * all primary key columns in the row(s) to be modified.
         */
        columns?: string[];
        /**
         * Required. The table whose rows will be written.
         */
        table?: string;
        /**
         * The values to be written. `values` can contain more than one list of
         * values. If it does, then multiple rows are written, one for each entry in
         * `values`. Each list in `values` must have exactly as many entries as
         * there are entries in columns above. Sending multiple lists is equivalent
         * to sending multiple `Mutation`s, each containing one `values` entry and
         * repeating table and columns. Individual values in each list are encoded
         * as described here.
         */
        values?: any[][];
    }
    class Resource$Projects {
        instanceConfigs: Resource$Projects$Instanceconfigs;
        instances: Resource$Projects$Instances;
        constructor();
    }
    class Resource$Projects$Instanceconfigs {
        constructor();
        /**
         * spanner.projects.instanceConfigs.get
         * @desc Gets information about a particular instance configuration.
         * @alias spanner.projects.instanceConfigs.get
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name Required. The name of the requested instance configuration. Values are of the form `projects/<project>/instanceConfigs/<config>`.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        get(params?: Params$Resource$Projects$Instanceconfigs$Get, options?: MethodOptions): GaxiosPromise<Schema$InstanceConfig>;
        get(params: Params$Resource$Projects$Instanceconfigs$Get, options: MethodOptions | BodyResponseCallback<Schema$InstanceConfig>, callback: BodyResponseCallback<Schema$InstanceConfig>): void;
        get(params: Params$Resource$Projects$Instanceconfigs$Get, callback: BodyResponseCallback<Schema$InstanceConfig>): void;
        get(callback: BodyResponseCallback<Schema$InstanceConfig>): void;
        /**
         * spanner.projects.instanceConfigs.list
         * @desc Lists the supported instance configurations for a given project.
         * @alias spanner.projects.instanceConfigs.list
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {integer=} params.pageSize Number of instance configurations to be returned in the response. If 0 or less, defaults to the server's maximum allowed page size.
         * @param {string=} params.pageToken If non-empty, `page_token` should contain a next_page_token from a previous ListInstanceConfigsResponse.
         * @param {string} params.parent Required. The name of the project for which a list of supported instance configurations is requested. Values are of the form `projects/<project>`.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        list(params?: Params$Resource$Projects$Instanceconfigs$List, options?: MethodOptions): GaxiosPromise<Schema$ListInstanceConfigsResponse>;
        list(params: Params$Resource$Projects$Instanceconfigs$List, options: MethodOptions | BodyResponseCallback<Schema$ListInstanceConfigsResponse>, callback: BodyResponseCallback<Schema$ListInstanceConfigsResponse>): void;
        list(params: Params$Resource$Projects$Instanceconfigs$List, callback: BodyResponseCallback<Schema$ListInstanceConfigsResponse>): void;
        list(callback: BodyResponseCallback<Schema$ListInstanceConfigsResponse>): void;
    }
    interface Params$Resource$Projects$Instanceconfigs$Get extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The name of the requested instance configuration. Values are of
         * the form `projects/<project>/instanceConfigs/<config>`.
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instanceconfigs$List extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Number of instance configurations to be returned in the response. If 0 or
         * less, defaults to the server's maximum allowed page size.
         */
        pageSize?: number;
        /**
         * If non-empty, `page_token` should contain a next_page_token from a
         * previous ListInstanceConfigsResponse.
         */
        pageToken?: string;
        /**
         * Required. The name of the project for which a list of supported instance
         * configurations is requested. Values are of the form `projects/<project>`.
         */
        parent?: string;
    }
    class Resource$Projects$Instances {
        databases: Resource$Projects$Instances$Databases;
        operations: Resource$Projects$Instances$Operations;
        constructor();
        /**
         * spanner.projects.instances.create
         * @desc 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.
         * @alias spanner.projects.instances.create
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.parent Required. The name of the project in which to create the instance. Values are of the form `projects/<project>`.
         * @param {().CreateInstanceRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        create(params?: Params$Resource$Projects$Instances$Create, options?: MethodOptions): GaxiosPromise<Schema$Operation>;
        create(params: Params$Resource$Projects$Instances$Create, options: MethodOptions | BodyResponseCallback<Schema$Operation>, callback: BodyResponseCallback<Schema$Operation>): void;
        create(params: Params$Resource$Projects$Instances$Create, callback: BodyResponseCallback<Schema$Operation>): void;
        create(callback: BodyResponseCallback<Schema$Operation>): void;
        /**
         * spanner.projects.instances.delete
         * @desc Deletes an instance.  Immediately upon completion of the request:
         * * Billing ceases for all of the instance's reserved resources.  Soon
         * afterward:    * The instance and *all of its databases* immediately and
         * irrevocably disappear from the API. All data in the databases     is
         * permanently deleted.
         * @alias spanner.projects.instances.delete
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name Required. The name of the instance to be deleted. Values are of the form `projects/<project>/instances/<instance>`
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        delete(params?: Params$Resource$Projects$Instances$Delete, options?: MethodOptions): GaxiosPromise<Schema$Empty>;
        delete(params: Params$Resource$Projects$Instances$Delete, options: MethodOptions | BodyResponseCallback<Schema$Empty>, callback: BodyResponseCallback<Schema$Empty>): void;
        delete(params: Params$Resource$Projects$Instances$Delete, callback: BodyResponseCallback<Schema$Empty>): void;
        delete(callback: BodyResponseCallback<Schema$Empty>): void;
        /**
         * spanner.projects.instances.get
         * @desc Gets information about a particular instance.
         * @alias spanner.projects.instances.get
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name Required. The name of the requested instance. Values are of the form `projects/<project>/instances/<instance>`.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        get(params?: Params$Resource$Projects$Instances$Get, options?: MethodOptions): GaxiosPromise<Schema$Instance>;
        get(params: Params$Resource$Projects$Instances$Get, options: MethodOptions | BodyResponseCallback<Schema$Instance>, callback: BodyResponseCallback<Schema$Instance>): void;
        get(params: Params$Resource$Projects$Instances$Get, callback: BodyResponseCallback<Schema$Instance>): void;
        get(callback: BodyResponseCallback<Schema$Instance>): void;
        /**
         * spanner.projects.instances.getIamPolicy
         * @desc Gets the access control policy for an instance resource. Returns an
         * empty policy if an instance exists but does not have a policy set.
         * Authorization requires `spanner.instances.getIamPolicy` on resource.
         * @alias spanner.projects.instances.getIamPolicy
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.resource_ REQUIRED: The Cloud Spanner resource for which the policy is being retrieved. The format is `projects/<project ID>/instances/<instance ID>` for instance resources and `projects/<project ID>/instances/<instance ID>/databases/<database ID>` for database resources.
         * @param {().GetIamPolicyRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        getIamPolicy(params?: Params$Resource$Projects$Instances$Getiampolicy, options?: MethodOptions): GaxiosPromise<Schema$Policy>;
        getIamPolicy(params: Params$Resource$Projects$Instances$Getiampolicy, options: MethodOptions | BodyResponseCallback<Schema$Policy>, callback: BodyResponseCallback<Schema$Policy>): void;
        getIamPolicy(params: Params$Resource$Projects$Instances$Getiampolicy, callback: BodyResponseCallback<Schema$Policy>): void;
        getIamPolicy(callback: BodyResponseCallback<Schema$Policy>): void;
        /**
         * spanner.projects.instances.list
         * @desc Lists all instances in the given project.
         * @alias spanner.projects.instances.list
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string=} params.filter 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".
         * @param {integer=} params.pageSize Number of instances to be returned in the response. If 0 or less, defaults to the server's maximum allowed page size.
         * @param {string=} params.pageToken If non-empty, `page_token` should contain a next_page_token from a previous ListInstancesResponse.
         * @param {string} params.parent Required. The name of the project for which a list of instances is requested. Values are of the form `projects/<project>`.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        list(params?: Params$Resource$Projects$Instances$List, options?: MethodOptions): GaxiosPromise<Schema$ListInstancesResponse>;
        list(params: Params$Resource$Projects$Instances$List, options: MethodOptions | BodyResponseCallback<Schema$ListInstancesResponse>, callback: BodyResponseCallback<Schema$ListInstancesResponse>): void;
        list(params: Params$Resource$Projects$Instances$List, callback: BodyResponseCallback<Schema$ListInstancesResponse>): void;
        list(callback: BodyResponseCallback<Schema$ListInstancesResponse>): void;
        /**
         * spanner.projects.instances.patch
         * @desc 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 resource name.
         * @alias spanner.projects.instances.patch
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name 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]`. The final segment of the name must be between 6 and 30 characters in length.
         * @param {().UpdateInstanceRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        patch(params?: Params$Resource$Projects$Instances$Patch, options?: MethodOptions): GaxiosPromise<Schema$Operation>;
        patch(params: Params$Resource$Projects$Instances$Patch, options: MethodOptions | BodyResponseCallback<Schema$Operation>, callback: BodyResponseCallback<Schema$Operation>): void;
        patch(params: Params$Resource$Projects$Instances$Patch, callback: BodyResponseCallback<Schema$Operation>): void;
        patch(callback: BodyResponseCallback<Schema$Operation>): void;
        /**
         * spanner.projects.instances.setIamPolicy
         * @desc Sets the access control policy on an instance resource. Replaces
         * any existing policy.  Authorization requires
         * `spanner.instances.setIamPolicy` on resource.
         * @alias spanner.projects.instances.setIamPolicy
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.resource_ 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.
         * @param {().SetIamPolicyRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        setIamPolicy(params?: Params$Resource$Projects$Instances$Setiampolicy, options?: MethodOptions): GaxiosPromise<Schema$Policy>;
        setIamPolicy(params: Params$Resource$Projects$Instances$Setiampolicy, options: MethodOptions | BodyResponseCallback<Schema$Policy>, callback: BodyResponseCallback<Schema$Policy>): void;
        setIamPolicy(params: Params$Resource$Projects$Instances$Setiampolicy, callback: BodyResponseCallback<Schema$Policy>): void;
        setIamPolicy(callback: BodyResponseCallback<Schema$Policy>): void;
        /**
         * spanner.projects.instances.testIamPermissions
         * @desc Returns permissions that the caller has on the specified instance
         * resource.  Attempting this RPC on a non-existent Cloud Spanner instance
         * resource will result in a NOT_FOUND error if the user has
         * `spanner.instances.list` permission on the containing Google Cloud
         * Project. Otherwise returns an empty set of permissions.
         * @alias spanner.projects.instances.testIamPermissions
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.resource_ REQUIRED: The Cloud Spanner resource for which permissions are being tested. The format is `projects/<project ID>/instances/<instance ID>` for instance resources and `projects/<project ID>/instances/<instance ID>/databases/<database ID>` for database resources.
         * @param {().TestIamPermissionsRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        testIamPermissions(params?: Params$Resource$Projects$Instances$Testiampermissions, options?: MethodOptions): GaxiosPromise<Schema$TestIamPermissionsResponse>;
        testIamPermissions(params: Params$Resource$Projects$Instances$Testiampermissions, options: MethodOptions | BodyResponseCallback<Schema$TestIamPermissionsResponse>, callback: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
        testIamPermissions(params: Params$Resource$Projects$Instances$Testiampermissions, callback: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
        testIamPermissions(callback: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
    }
    interface Params$Resource$Projects$Instances$Create extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The name of the project in which to create the instance. Values
         * are of the form `projects/<project>`.
         */
        parent?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$CreateInstanceRequest;
    }
    interface Params$Resource$Projects$Instances$Delete extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The name of the instance to be deleted. Values are of the form
         * `projects/<project>/instances/<instance>`
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instances$Get extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The name of the requested instance. Values are of the form
         * `projects/<project>/instances/<instance>`.
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instances$Getiampolicy extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * REQUIRED: The Cloud Spanner resource for which the policy is being
         * retrieved. The format is `projects/<project ID>/instances/<instance ID>`
         * for instance resources and `projects/<project ID>/instances/<instance
         * ID>/databases/<database ID>` for database resources.
         */
        resource?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$GetIamPolicyRequest;
    }
    interface Params$Resource$Projects$Instances$List extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * 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".
         */
        filter?: string;
        /**
         * Number of instances to be returned in the response. If 0 or less,
         * defaults to the server's maximum allowed page size.
         */
        pageSize?: number;
        /**
         * If non-empty, `page_token` should contain a next_page_token from a
         * previous ListInstancesResponse.
         */
        pageToken?: string;
        /**
         * Required. The name of the project for which a list of instances is
         * requested. Values are of the form `projects/<project>`.
         */
        parent?: string;
    }
    interface Params$Resource$Projects$Instances$Patch extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * 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]`. The final segment of the
         * name must be between 6 and 30 characters in length.
         */
        name?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$UpdateInstanceRequest;
    }
    interface Params$Resource$Projects$Instances$Setiampolicy extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * REQUIRED: The Cloud Spanner resource for which the policy is being set.
         * The format is `projects/<project ID>/instances/<instance ID>` for
         * instance resources and `projects/<project ID>/instances/<instance
         * ID>/databases/<database ID>` for databases resources.
         */
        resource?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$SetIamPolicyRequest;
    }
    interface Params$Resource$Projects$Instances$Testiampermissions extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * 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.
         */
        resource?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$TestIamPermissionsRequest;
    }
    class Resource$Projects$Instances$Databases {
        operations: Resource$Projects$Instances$Databases$Operations;
        sessions: Resource$Projects$Instances$Databases$Sessions;
        constructor();
        /**
         * spanner.projects.instances.databases.create
         * @desc 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.
         * @alias spanner.projects.instances.databases.create
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.parent Required. The name of the instance that will serve the new database. Values are of the form `projects/<project>/instances/<instance>`.
         * @param {().CreateDatabaseRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        create(params?: Params$Resource$Projects$Instances$Databases$Create, options?: MethodOptions): GaxiosPromise<Schema$Operation>;
        create(params: Params$Resource$Projects$Instances$Databases$Create, options: MethodOptions | BodyResponseCallback<Schema$Operation>, callback: BodyResponseCallback<Schema$Operation>): void;
        create(params: Params$Resource$Projects$Instances$Databases$Create, callback: BodyResponseCallback<Schema$Operation>): void;
        create(callback: BodyResponseCallback<Schema$Operation>): void;
        /**
         * spanner.projects.instances.databases.dropDatabase
         * @desc Drops (aka deletes) a Cloud Spanner database.
         * @alias spanner.projects.instances.databases.dropDatabase
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.database Required. The database to be dropped.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        dropDatabase(params?: Params$Resource$Projects$Instances$Databases$Dropdatabase, options?: MethodOptions): GaxiosPromise<Schema$Empty>;
        dropDatabase(params: Params$Resource$Projects$Instances$Databases$Dropdatabase, options: MethodOptions | BodyResponseCallback<Schema$Empty>, callback: BodyResponseCallback<Schema$Empty>): void;
        dropDatabase(params: Params$Resource$Projects$Instances$Databases$Dropdatabase, callback: BodyResponseCallback<Schema$Empty>): void;
        dropDatabase(callback: BodyResponseCallback<Schema$Empty>): void;
        /**
         * spanner.projects.instances.databases.get
         * @desc Gets the state of a Cloud Spanner database.
         * @alias spanner.projects.instances.databases.get
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name Required. The name of the requested database. Values are of the form `projects/<project>/instances/<instance>/databases/<database>`.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        get(params?: Params$Resource$Projects$Instances$Databases$Get, options?: MethodOptions): GaxiosPromise<Schema$Database>;
        get(params: Params$Resource$Projects$Instances$Databases$Get, options: MethodOptions | BodyResponseCallback<Schema$Database>, callback: BodyResponseCallback<Schema$Database>): void;
        get(params: Params$Resource$Projects$Instances$Databases$Get, callback: BodyResponseCallback<Schema$Database>): void;
        get(callback: BodyResponseCallback<Schema$Database>): void;
        /**
         * spanner.projects.instances.databases.getDdl
         * @desc 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.
         * @alias spanner.projects.instances.databases.getDdl
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.database Required. The database whose schema we wish to get.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        getDdl(params?: Params$Resource$Projects$Instances$Databases$Getddl, options?: MethodOptions): GaxiosPromise<Schema$GetDatabaseDdlResponse>;
        getDdl(params: Params$Resource$Projects$Instances$Databases$Getddl, options: MethodOptions | BodyResponseCallback<Schema$GetDatabaseDdlResponse>, callback: BodyResponseCallback<Schema$GetDatabaseDdlResponse>): void;
        getDdl(params: Params$Resource$Projects$Instances$Databases$Getddl, callback: BodyResponseCallback<Schema$GetDatabaseDdlResponse>): void;
        getDdl(callback: BodyResponseCallback<Schema$GetDatabaseDdlResponse>): void;
        /**
         * spanner.projects.instances.databases.getIamPolicy
         * @desc 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.
         * @alias spanner.projects.instances.databases.getIamPolicy
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.resource_ 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.
         * @param {().GetIamPolicyRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        getIamPolicy(params?: Params$Resource$Projects$Instances$Databases$Getiampolicy, options?: MethodOptions): GaxiosPromise<Schema$Policy>;
        getIamPolicy(params: Params$Resource$Projects$Instances$Databases$Getiampolicy, options: MethodOptions | BodyResponseCallback<Schema$Policy>, callback: BodyResponseCallback<Schema$Policy>): void;
        getIamPolicy(params: Params$Resource$Projects$Instances$Databases$Getiampolicy, callback: BodyResponseCallback<Schema$Policy>): void;
        getIamPolicy(callback: BodyResponseCallback<Schema$Policy>): void;
        /**
         * spanner.projects.instances.databases.list
         * @desc Lists Cloud Spanner databases.
         * @alias spanner.projects.instances.databases.list
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {integer=} params.pageSize Number of databases to be returned in the response. If 0 or less, defaults to the server's maximum allowed page size.
         * @param {string=} params.pageToken If non-empty, `page_token` should contain a next_page_token from a previous ListDatabasesResponse.
         * @param {string} params.parent Required. The instance whose databases should be listed. Values are of the form `projects/<project>/instances/<instance>`.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        list(params?: Params$Resource$Projects$Instances$Databases$List, options?: MethodOptions): GaxiosPromise<Schema$ListDatabasesResponse>;
        list(params: Params$Resource$Projects$Instances$Databases$List, options: MethodOptions | BodyResponseCallback<Schema$ListDatabasesResponse>, callback: BodyResponseCallback<Schema$ListDatabasesResponse>): void;
        list(params: Params$Resource$Projects$Instances$Databases$List, callback: BodyResponseCallback<Schema$ListDatabasesResponse>): void;
        list(callback: BodyResponseCallback<Schema$ListDatabasesResponse>): void;
        /**
         * spanner.projects.instances.databases.setIamPolicy
         * @desc Sets the access control policy on a database resource. Replaces any
         * existing policy.  Authorization requires `spanner.databases.setIamPolicy`
         * permission on resource.
         * @alias spanner.projects.instances.databases.setIamPolicy
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.resource_ 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.
         * @param {().SetIamPolicyRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        setIamPolicy(params?: Params$Resource$Projects$Instances$Databases$Setiampolicy, options?: MethodOptions): GaxiosPromise<Schema$Policy>;
        setIamPolicy(params: Params$Resource$Projects$Instances$Databases$Setiampolicy, options: MethodOptions | BodyResponseCallback<Schema$Policy>, callback: BodyResponseCallback<Schema$Policy>): void;
        setIamPolicy(params: Params$Resource$Projects$Instances$Databases$Setiampolicy, callback: BodyResponseCallback<Schema$Policy>): void;
        setIamPolicy(callback: BodyResponseCallback<Schema$Policy>): void;
        /**
         * spanner.projects.instances.databases.testIamPermissions
         * @desc 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.
         * @alias spanner.projects.instances.databases.testIamPermissions
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.resource_ 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.
         * @param {().TestIamPermissionsRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        testIamPermissions(params?: Params$Resource$Projects$Instances$Databases$Testiampermissions, options?: MethodOptions): GaxiosPromise<Schema$TestIamPermissionsResponse>;
        testIamPermissions(params: Params$Resource$Projects$Instances$Databases$Testiampermissions, options: MethodOptions | BodyResponseCallback<Schema$TestIamPermissionsResponse>, callback: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
        testIamPermissions(params: Params$Resource$Projects$Instances$Databases$Testiampermissions, callback: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
        testIamPermissions(callback: BodyResponseCallback<Schema$TestIamPermissionsResponse>): void;
        /**
         * spanner.projects.instances.databases.updateDdl
         * @desc 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.
         * @alias spanner.projects.instances.databases.updateDdl
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.database Required. The database to update.
         * @param {().UpdateDatabaseDdlRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        updateDdl(params?: Params$Resource$Projects$Instances$Databases$Updateddl, options?: MethodOptions): GaxiosPromise<Schema$Operation>;
        updateDdl(params: Params$Resource$Projects$Instances$Databases$Updateddl, options: MethodOptions | BodyResponseCallback<Schema$Operation>, callback: BodyResponseCallback<Schema$Operation>): void;
        updateDdl(params: Params$Resource$Projects$Instances$Databases$Updateddl, callback: BodyResponseCallback<Schema$Operation>): void;
        updateDdl(callback: BodyResponseCallback<Schema$Operation>): void;
    }
    interface Params$Resource$Projects$Instances$Databases$Create extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The name of the instance that will serve the new database.
         * Values are of the form `projects/<project>/instances/<instance>`.
         */
        parent?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$CreateDatabaseRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Dropdatabase extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The database to be dropped.
         */
        database?: string;
    }
    interface Params$Resource$Projects$Instances$Databases$Get extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The name of the requested database. Values are of the form
         * `projects/<project>/instances/<instance>/databases/<database>`.
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instances$Databases$Getddl extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The database whose schema we wish to get.
         */
        database?: string;
    }
    interface Params$Resource$Projects$Instances$Databases$Getiampolicy extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * 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.
         */
        resource?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$GetIamPolicyRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$List extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Number of databases to be returned in the response. If 0 or less,
         * defaults to the server's maximum allowed page size.
         */
        pageSize?: number;
        /**
         * If non-empty, `page_token` should contain a next_page_token from a
         * previous ListDatabasesResponse.
         */
        pageToken?: string;
        /**
         * Required. The instance whose databases should be listed. Values are of
         * the form `projects/<project>/instances/<instance>`.
         */
        parent?: string;
    }
    interface Params$Resource$Projects$Instances$Databases$Setiampolicy extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * REQUIRED: The Cloud Spanner resource for which the policy is being set.
         * The format is `projects/<project ID>/instances/<instance ID>` for
         * instance resources and `projects/<project ID>/instances/<instance
         * ID>/databases/<database ID>` for databases resources.
         */
        resource?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$SetIamPolicyRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Testiampermissions extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * REQUIRED: The Cloud Spanner resource for which permissions are being
         * tested. The format is `projects/<project ID>/instances/<instance ID>` for
         * instance resources and `projects/<project ID>/instances/<instance
         * ID>/databases/<database ID>` for database resources.
         */
        resource?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$TestIamPermissionsRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Updateddl extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The database to update.
         */
        database?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$UpdateDatabaseDdlRequest;
    }
    class Resource$Projects$Instances$Databases$Operations {
        constructor();
        /**
         * spanner.projects.instances.databases.operations.cancel
         * @desc Starts asynchronous cancellation on a long-running operation.  The
         * server makes a best effort to cancel the operation, but success is not
         * guaranteed.  If the server doesn't support this method, it returns
         * `google.rpc.Code.UNIMPLEMENTED`.  Clients can use Operations.GetOperation
         * or other methods to check whether the cancellation succeeded or whether
         * the operation completed despite cancellation. On successful cancellation,
         * the operation is not deleted; instead, it becomes an operation with an
         * Operation.error value with a google.rpc.Status.code of 1, corresponding
         * to `Code.CANCELLED`.
         * @alias spanner.projects.instances.databases.operations.cancel
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name The name of the operation resource to be cancelled.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        cancel(params?: Params$Resource$Projects$Instances$Databases$Operations$Cancel, options?: MethodOptions): GaxiosPromise<Schema$Empty>;
        cancel(params: Params$Resource$Projects$Instances$Databases$Operations$Cancel, options: MethodOptions | BodyResponseCallback<Schema$Empty>, callback: BodyResponseCallback<Schema$Empty>): void;
        cancel(params: Params$Resource$Projects$Instances$Databases$Operations$Cancel, callback: BodyResponseCallback<Schema$Empty>): void;
        cancel(callback: BodyResponseCallback<Schema$Empty>): void;
        /**
         * spanner.projects.instances.databases.operations.delete
         * @desc Deletes a long-running operation. This method indicates that the
         * client is no longer interested in the operation result. It does not
         * cancel the operation. If the server doesn't support this method, it
         * returns `google.rpc.Code.UNIMPLEMENTED`.
         * @alias spanner.projects.instances.databases.operations.delete
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name The name of the operation resource to be deleted.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        delete(params?: Params$Resource$Projects$Instances$Databases$Operations$Delete, options?: MethodOptions): GaxiosPromise<Schema$Empty>;
        delete(params: Params$Resource$Projects$Instances$Databases$Operations$Delete, options: MethodOptions | BodyResponseCallback<Schema$Empty>, callback: BodyResponseCallback<Schema$Empty>): void;
        delete(params: Params$Resource$Projects$Instances$Databases$Operations$Delete, callback: BodyResponseCallback<Schema$Empty>): void;
        delete(callback: BodyResponseCallback<Schema$Empty>): void;
        /**
         * spanner.projects.instances.databases.operations.get
         * @desc Gets the latest state of a long-running operation.  Clients can use
         * this method to poll the operation result at intervals as recommended by
         * the API service.
         * @alias spanner.projects.instances.databases.operations.get
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name The name of the operation resource.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        get(params?: Params$Resource$Projects$Instances$Databases$Operations$Get, options?: MethodOptions): GaxiosPromise<Schema$Operation>;
        get(params: Params$Resource$Projects$Instances$Databases$Operations$Get, options: MethodOptions | BodyResponseCallback<Schema$Operation>, callback: BodyResponseCallback<Schema$Operation>): void;
        get(params: Params$Resource$Projects$Instances$Databases$Operations$Get, callback: BodyResponseCallback<Schema$Operation>): void;
        get(callback: BodyResponseCallback<Schema$Operation>): void;
        /**
         * spanner.projects.instances.databases.operations.list
         * @desc Lists operations that match the specified filter in the request. If
         * the server doesn't support this method, it returns `UNIMPLEMENTED`. NOTE:
         * the `name` binding allows API services to override the binding to use
         * different resource name schemes, such as `users/x/operations`. To
         * override the binding, API services can add a binding such as
         * `"/v1/{name=users/x}/operations"` to their service configuration. For
         * backwards compatibility, the default name includes the operations
         * collection id, however overriding users must ensure the name binding is
         * the parent resource, without the operations collection id.
         * @alias spanner.projects.instances.databases.operations.list
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string=} params.filter The standard list filter.
         * @param {string} params.name The name of the operation's parent resource.
         * @param {integer=} params.pageSize The standard list page size.
         * @param {string=} params.pageToken The standard list page token.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        list(params?: Params$Resource$Projects$Instances$Databases$Operations$List, options?: MethodOptions): GaxiosPromise<Schema$ListOperationsResponse>;
        list(params: Params$Resource$Projects$Instances$Databases$Operations$List, options: MethodOptions | BodyResponseCallback<Schema$ListOperationsResponse>, callback: BodyResponseCallback<Schema$ListOperationsResponse>): void;
        list(params: Params$Resource$Projects$Instances$Databases$Operations$List, callback: BodyResponseCallback<Schema$ListOperationsResponse>): void;
        list(callback: BodyResponseCallback<Schema$ListOperationsResponse>): void;
    }
    interface Params$Resource$Projects$Instances$Databases$Operations$Cancel extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * The name of the operation resource to be cancelled.
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instances$Databases$Operations$Delete extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * The name of the operation resource to be deleted.
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instances$Databases$Operations$Get extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * The name of the operation resource.
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instances$Databases$Operations$List extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * The standard list filter.
         */
        filter?: string;
        /**
         * The name of the operation's parent resource.
         */
        name?: string;
        /**
         * The standard list page size.
         */
        pageSize?: number;
        /**
         * The standard list page token.
         */
        pageToken?: string;
    }
    class Resource$Projects$Instances$Databases$Sessions {
        constructor();
        /**
         * spanner.projects.instances.databases.sessions.beginTransaction
         * @desc Begins a new transaction. This step can often be skipped: Read,
         * ExecuteSql and Commit can begin a new transaction as a side-effect.
         * @alias spanner.projects.instances.databases.sessions.beginTransaction
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.session Required. The session in which the transaction runs.
         * @param {().BeginTransactionRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        beginTransaction(params?: Params$Resource$Projects$Instances$Databases$Sessions$Begintransaction, options?: MethodOptions): GaxiosPromise<Schema$Transaction>;
        beginTransaction(params: Params$Resource$Projects$Instances$Databases$Sessions$Begintransaction, options: MethodOptions | BodyResponseCallback<Schema$Transaction>, callback: BodyResponseCallback<Schema$Transaction>): void;
        beginTransaction(params: Params$Resource$Projects$Instances$Databases$Sessions$Begintransaction, callback: BodyResponseCallback<Schema$Transaction>): void;
        beginTransaction(callback: BodyResponseCallback<Schema$Transaction>): void;
        /**
         * spanner.projects.instances.databases.sessions.commit
         * @desc Commits a transaction. The request includes the mutations to be
         * applied to rows in the database.  `Commit` might return an `ABORTED`
         * error. This can occur at any time; commonly, the cause is conflicts with
         * concurrent transactions. However, it can also happen for a variety of
         * other reasons. If `Commit` returns `ABORTED`, the caller should
         * re-attempt the transaction from the beginning, re-using the same session.
         * @alias spanner.projects.instances.databases.sessions.commit
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.session Required. The session in which the transaction to be committed is running.
         * @param {().CommitRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        commit(params?: Params$Resource$Projects$Instances$Databases$Sessions$Commit, options?: MethodOptions): GaxiosPromise<Schema$CommitResponse>;
        commit(params: Params$Resource$Projects$Instances$Databases$Sessions$Commit, options: MethodOptions | BodyResponseCallback<Schema$CommitResponse>, callback: BodyResponseCallback<Schema$CommitResponse>): void;
        commit(params: Params$Resource$Projects$Instances$Databases$Sessions$Commit, callback: BodyResponseCallback<Schema$CommitResponse>): void;
        commit(callback: BodyResponseCallback<Schema$CommitResponse>): void;
        /**
         * spanner.projects.instances.databases.sessions.create
         * @desc Creates a new session. A session can be used to perform
         * transactions that read and/or modify data in a Cloud Spanner database.
         * Sessions are meant to be reused for many consecutive transactions.
         * Sessions can only execute one transaction at a time. To execute multiple
         * concurrent read-write/write-only transactions, create multiple sessions.
         * Note that standalone reads and queries use a transaction internally, and
         * count toward the one transaction limit.  Cloud Spanner limits the number
         * of sessions that can exist at any given time; thus, it is a good idea to
         * delete idle and/or unneeded sessions. Aside from explicit deletes, Cloud
         * Spanner can delete sessions for which no operations are sent for more
         * than an hour. If a session is deleted, requests to it return `NOT_FOUND`.
         * Idle sessions can be kept alive by sending a trivial SQL query
         * periodically, e.g., `"SELECT 1"`.
         * @alias spanner.projects.instances.databases.sessions.create
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.database Required. The database in which the new session is created.
         * @param {().CreateSessionRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        create(params?: Params$Resource$Projects$Instances$Databases$Sessions$Create, options?: MethodOptions): GaxiosPromise<Schema$Session>;
        create(params: Params$Resource$Projects$Instances$Databases$Sessions$Create, options: MethodOptions | BodyResponseCallback<Schema$Session>, callback: BodyResponseCallback<Schema$Session>): void;
        create(params: Params$Resource$Projects$Instances$Databases$Sessions$Create, callback: BodyResponseCallback<Schema$Session>): void;
        create(callback: BodyResponseCallback<Schema$Session>): void;
        /**
         * spanner.projects.instances.databases.sessions.delete
         * @desc Ends a session, releasing server resources associated with it.
         * @alias spanner.projects.instances.databases.sessions.delete
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name Required. The name of the session to delete.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        delete(params?: Params$Resource$Projects$Instances$Databases$Sessions$Delete, options?: MethodOptions): GaxiosPromise<Schema$Empty>;
        delete(params: Params$Resource$Projects$Instances$Databases$Sessions$Delete, options: MethodOptions | BodyResponseCallback<Schema$Empty>, callback: BodyResponseCallback<Schema$Empty>): void;
        delete(params: Params$Resource$Projects$Instances$Databases$Sessions$Delete, callback: BodyResponseCallback<Schema$Empty>): void;
        delete(callback: BodyResponseCallback<Schema$Empty>): void;
        /**
         * spanner.projects.instances.databases.sessions.executeSql
         * @desc Executes an SQL statement, returning all results in a single reply.
         * This method cannot be used to return a result set larger than 10 MiB; if
         * the query yields more data than that, the query fails with a
         * `FAILED_PRECONDITION` error.  Operations inside read-write transactions
         * might return `ABORTED`. If this occurs, the application should restart
         * the transaction from the beginning. See Transaction for more details.
         * Larger result sets can be fetched in streaming fashion by calling
         * ExecuteStreamingSql instead.
         * @alias spanner.projects.instances.databases.sessions.executeSql
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.session Required. The session in which the SQL query should be performed.
         * @param {().ExecuteSqlRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        executeSql(params?: Params$Resource$Projects$Instances$Databases$Sessions$Executesql, options?: MethodOptions): GaxiosPromise<Schema$ResultSet>;
        executeSql(params: Params$Resource$Projects$Instances$Databases$Sessions$Executesql, options: MethodOptions | BodyResponseCallback<Schema$ResultSet>, callback: BodyResponseCallback<Schema$ResultSet>): void;
        executeSql(params: Params$Resource$Projects$Instances$Databases$Sessions$Executesql, callback: BodyResponseCallback<Schema$ResultSet>): void;
        executeSql(callback: BodyResponseCallback<Schema$ResultSet>): void;
        /**
         * spanner.projects.instances.databases.sessions.executeStreamingSql
         * @desc Like ExecuteSql, except returns the result set as a stream. Unlike
         * ExecuteSql, there is no limit on the size of the returned result set.
         * However, no individual row in the result set can exceed 100 MiB, and no
         * column value can exceed 10 MiB.
         * @alias spanner.projects.instances.databases.sessions.executeStreamingSql
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.session Required. The session in which the SQL query should be performed.
         * @param {().ExecuteSqlRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        executeStreamingSql(params?: Params$Resource$Projects$Instances$Databases$Sessions$Executestreamingsql, options?: MethodOptions): GaxiosPromise<Schema$PartialResultSet>;
        executeStreamingSql(params: Params$Resource$Projects$Instances$Databases$Sessions$Executestreamingsql, options: MethodOptions | BodyResponseCallback<Schema$PartialResultSet>, callback: BodyResponseCallback<Schema$PartialResultSet>): void;
        executeStreamingSql(params: Params$Resource$Projects$Instances$Databases$Sessions$Executestreamingsql, callback: BodyResponseCallback<Schema$PartialResultSet>): void;
        executeStreamingSql(callback: BodyResponseCallback<Schema$PartialResultSet>): void;
        /**
         * spanner.projects.instances.databases.sessions.get
         * @desc Gets a session. Returns `NOT_FOUND` if the session does not exist.
         * This is mainly useful for determining whether a session is still alive.
         * @alias spanner.projects.instances.databases.sessions.get
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name Required. The name of the session to retrieve.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        get(params?: Params$Resource$Projects$Instances$Databases$Sessions$Get, options?: MethodOptions): GaxiosPromise<Schema$Session>;
        get(params: Params$Resource$Projects$Instances$Databases$Sessions$Get, options: MethodOptions | BodyResponseCallback<Schema$Session>, callback: BodyResponseCallback<Schema$Session>): void;
        get(params: Params$Resource$Projects$Instances$Databases$Sessions$Get, callback: BodyResponseCallback<Schema$Session>): void;
        get(callback: BodyResponseCallback<Schema$Session>): void;
        /**
         * spanner.projects.instances.databases.sessions.list
         * @desc Lists all sessions in a given database.
         * @alias spanner.projects.instances.databases.sessions.list
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.database Required. The database in which to list sessions.
         * @param {string=} params.filter An expression for filtering the results of the request. Filter rules are case insensitive. The fields eligible for filtering are:    * `labels.key` where key is the name of a label  Some examples of using filters are:    * `labels.env:*` --> The session has the label "env".   * `labels.env:dev` --> The session has the label "env" and the value of                        the label contains the string "dev".
         * @param {integer=} params.pageSize Number of sessions to be returned in the response. If 0 or less, defaults to the server's maximum allowed page size.
         * @param {string=} params.pageToken If non-empty, `page_token` should contain a next_page_token from a previous ListSessionsResponse.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        list(params?: Params$Resource$Projects$Instances$Databases$Sessions$List, options?: MethodOptions): GaxiosPromise<Schema$ListSessionsResponse>;
        list(params: Params$Resource$Projects$Instances$Databases$Sessions$List, options: MethodOptions | BodyResponseCallback<Schema$ListSessionsResponse>, callback: BodyResponseCallback<Schema$ListSessionsResponse>): void;
        list(params: Params$Resource$Projects$Instances$Databases$Sessions$List, callback: BodyResponseCallback<Schema$ListSessionsResponse>): void;
        list(callback: BodyResponseCallback<Schema$ListSessionsResponse>): void;
        /**
         * spanner.projects.instances.databases.sessions.partitionQuery
         * @desc Creates a set of partition tokens that can be used to execute a
         * query operation in parallel.  Each of the returned partition tokens can
         * be used by ExecuteStreamingSql to specify a subset of the query result to
         * read.  The same session and read-only transaction must be used by the
         * PartitionQueryRequest used to create the partition tokens and the
         * ExecuteSqlRequests that use the partition tokens.  Partition tokens
         * become invalid when the session used to create them is deleted, is idle
         * for too long, begins a new transaction, or becomes too old.  When any of
         * these happen, it is not possible to resume the query, and the whole
         * operation must be restarted from the beginning.
         * @alias spanner.projects.instances.databases.sessions.partitionQuery
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.session Required. The session used to create the partitions.
         * @param {().PartitionQueryRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        partitionQuery(params?: Params$Resource$Projects$Instances$Databases$Sessions$Partitionquery, options?: MethodOptions): GaxiosPromise<Schema$PartitionResponse>;
        partitionQuery(params: Params$Resource$Projects$Instances$Databases$Sessions$Partitionquery, options: MethodOptions | BodyResponseCallback<Schema$PartitionResponse>, callback: BodyResponseCallback<Schema$PartitionResponse>): void;
        partitionQuery(params: Params$Resource$Projects$Instances$Databases$Sessions$Partitionquery, callback: BodyResponseCallback<Schema$PartitionResponse>): void;
        partitionQuery(callback: BodyResponseCallback<Schema$PartitionResponse>): void;
        /**
         * spanner.projects.instances.databases.sessions.partitionRead
         * @desc Creates a set of partition tokens that can be used to execute a
         * read operation in parallel.  Each of the returned partition tokens can be
         * used by StreamingRead to specify a subset of the read result to read. The
         * same session and read-only transaction must be used by the
         * PartitionReadRequest used to create the partition tokens and the
         * ReadRequests that use the partition tokens.  There are no ordering
         * guarantees on rows returned among the returned partition tokens, or even
         * within each individual StreamingRead call issued with a partition_token.
         * Partition tokens become invalid when the session used to create them is
         * deleted, is idle for too long, begins a new transaction, or becomes too
         * old.  When any of these happen, it is not possible to resume the read,
         * and the whole operation must be restarted from the beginning.
         * @alias spanner.projects.instances.databases.sessions.partitionRead
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.session Required. The session used to create the partitions.
         * @param {().PartitionReadRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        partitionRead(params?: Params$Resource$Projects$Instances$Databases$Sessions$Partitionread, options?: MethodOptions): GaxiosPromise<Schema$PartitionResponse>;
        partitionRead(params: Params$Resource$Projects$Instances$Databases$Sessions$Partitionread, options: MethodOptions | BodyResponseCallback<Schema$PartitionResponse>, callback: BodyResponseCallback<Schema$PartitionResponse>): void;
        partitionRead(params: Params$Resource$Projects$Instances$Databases$Sessions$Partitionread, callback: BodyResponseCallback<Schema$PartitionResponse>): void;
        partitionRead(callback: BodyResponseCallback<Schema$PartitionResponse>): void;
        /**
         * spanner.projects.instances.databases.sessions.read
         * @desc Reads rows from the database using key lookups and scans, as a
         * simple key/value style alternative to ExecuteSql.  This method cannot be
         * used to return a result set larger than 10 MiB; if the read matches more
         * data than that, the read fails with a `FAILED_PRECONDITION` error.  Reads
         * inside read-write transactions might return `ABORTED`. If this occurs,
         * the application should restart the transaction from the beginning. See
         * Transaction for more details.  Larger result sets can be yielded in
         * streaming fashion by calling StreamingRead instead.
         * @alias spanner.projects.instances.databases.sessions.read
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.session Required. The session in which the read should be performed.
         * @param {().ReadRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        read(params?: Params$Resource$Projects$Instances$Databases$Sessions$Read, options?: MethodOptions): GaxiosPromise<Schema$ResultSet>;
        read(params: Params$Resource$Projects$Instances$Databases$Sessions$Read, options: MethodOptions | BodyResponseCallback<Schema$ResultSet>, callback: BodyResponseCallback<Schema$ResultSet>): void;
        read(params: Params$Resource$Projects$Instances$Databases$Sessions$Read, callback: BodyResponseCallback<Schema$ResultSet>): void;
        read(callback: BodyResponseCallback<Schema$ResultSet>): void;
        /**
         * spanner.projects.instances.databases.sessions.rollback
         * @desc Rolls back a transaction, releasing any locks it holds. It is a
         * good idea to call this for any transaction that includes one or more Read
         * or ExecuteSql requests and ultimately decides not to commit.  `Rollback`
         * returns `OK` if it successfully aborts the transaction, the transaction
         * was already aborted, or the transaction is not found. `Rollback` never
         * returns `ABORTED`.
         * @alias spanner.projects.instances.databases.sessions.rollback
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.session Required. The session in which the transaction to roll back is running.
         * @param {().RollbackRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        rollback(params?: Params$Resource$Projects$Instances$Databases$Sessions$Rollback, options?: MethodOptions): GaxiosPromise<Schema$Empty>;
        rollback(params: Params$Resource$Projects$Instances$Databases$Sessions$Rollback, options: MethodOptions | BodyResponseCallback<Schema$Empty>, callback: BodyResponseCallback<Schema$Empty>): void;
        rollback(params: Params$Resource$Projects$Instances$Databases$Sessions$Rollback, callback: BodyResponseCallback<Schema$Empty>): void;
        rollback(callback: BodyResponseCallback<Schema$Empty>): void;
        /**
         * spanner.projects.instances.databases.sessions.streamingRead
         * @desc Like Read, except returns the result set as a stream. Unlike Read,
         * there is no limit on the size of the returned result set. However, no
         * individual row in the result set can exceed 100 MiB, and no column value
         * can exceed 10 MiB.
         * @alias spanner.projects.instances.databases.sessions.streamingRead
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.session Required. The session in which the read should be performed.
         * @param {().ReadRequest} params.resource Request body data
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        streamingRead(params?: Params$Resource$Projects$Instances$Databases$Sessions$Streamingread, options?: MethodOptions): GaxiosPromise<Schema$PartialResultSet>;
        streamingRead(params: Params$Resource$Projects$Instances$Databases$Sessions$Streamingread, options: MethodOptions | BodyResponseCallback<Schema$PartialResultSet>, callback: BodyResponseCallback<Schema$PartialResultSet>): void;
        streamingRead(params: Params$Resource$Projects$Instances$Databases$Sessions$Streamingread, callback: BodyResponseCallback<Schema$PartialResultSet>): void;
        streamingRead(callback: BodyResponseCallback<Schema$PartialResultSet>): void;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Begintransaction extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The session in which the transaction runs.
         */
        session?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$BeginTransactionRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Commit extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The session in which the transaction to be committed is
         * running.
         */
        session?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$CommitRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Create extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The database in which the new session is created.
         */
        database?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$CreateSessionRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Delete extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The name of the session to delete.
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Executesql extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The session in which the SQL query should be performed.
         */
        session?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$ExecuteSqlRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Executestreamingsql extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The session in which the SQL query should be performed.
         */
        session?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$ExecuteSqlRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Get extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The name of the session to retrieve.
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$List extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The database in which to list sessions.
         */
        database?: string;
        /**
         * An expression for filtering the results of the request. Filter rules are
         * case insensitive. The fields eligible for filtering are:    *
         * `labels.key` where key is the name of a label  Some examples of using
         * filters are:    * `labels.env:*` --> The session has the label "env".   *
         * `labels.env:dev` --> The session has the label "env" and the value of the
         * label contains the string "dev".
         */
        filter?: string;
        /**
         * Number of sessions to be returned in the response. If 0 or less, defaults
         * to the server's maximum allowed page size.
         */
        pageSize?: number;
        /**
         * If non-empty, `page_token` should contain a next_page_token from a
         * previous ListSessionsResponse.
         */
        pageToken?: string;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Partitionquery extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The session used to create the partitions.
         */
        session?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$PartitionQueryRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Partitionread extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The session used to create the partitions.
         */
        session?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$PartitionReadRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Read extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The session in which the read should be performed.
         */
        session?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$ReadRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Rollback extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The session in which the transaction to roll back is running.
         */
        session?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$RollbackRequest;
    }
    interface Params$Resource$Projects$Instances$Databases$Sessions$Streamingread extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * Required. The session in which the read should be performed.
         */
        session?: string;
        /**
         * Request body metadata
         */
        requestBody?: Schema$ReadRequest;
    }
    class Resource$Projects$Instances$Operations {
        constructor();
        /**
         * spanner.projects.instances.operations.cancel
         * @desc Starts asynchronous cancellation on a long-running operation.  The
         * server makes a best effort to cancel the operation, but success is not
         * guaranteed.  If the server doesn't support this method, it returns
         * `google.rpc.Code.UNIMPLEMENTED`.  Clients can use Operations.GetOperation
         * or other methods to check whether the cancellation succeeded or whether
         * the operation completed despite cancellation. On successful cancellation,
         * the operation is not deleted; instead, it becomes an operation with an
         * Operation.error value with a google.rpc.Status.code of 1, corresponding
         * to `Code.CANCELLED`.
         * @alias spanner.projects.instances.operations.cancel
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name The name of the operation resource to be cancelled.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        cancel(params?: Params$Resource$Projects$Instances$Operations$Cancel, options?: MethodOptions): GaxiosPromise<Schema$Empty>;
        cancel(params: Params$Resource$Projects$Instances$Operations$Cancel, options: MethodOptions | BodyResponseCallback<Schema$Empty>, callback: BodyResponseCallback<Schema$Empty>): void;
        cancel(params: Params$Resource$Projects$Instances$Operations$Cancel, callback: BodyResponseCallback<Schema$Empty>): void;
        cancel(callback: BodyResponseCallback<Schema$Empty>): void;
        /**
         * spanner.projects.instances.operations.delete
         * @desc Deletes a long-running operation. This method indicates that the
         * client is no longer interested in the operation result. It does not
         * cancel the operation. If the server doesn't support this method, it
         * returns `google.rpc.Code.UNIMPLEMENTED`.
         * @alias spanner.projects.instances.operations.delete
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name The name of the operation resource to be deleted.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        delete(params?: Params$Resource$Projects$Instances$Operations$Delete, options?: MethodOptions): GaxiosPromise<Schema$Empty>;
        delete(params: Params$Resource$Projects$Instances$Operations$Delete, options: MethodOptions | BodyResponseCallback<Schema$Empty>, callback: BodyResponseCallback<Schema$Empty>): void;
        delete(params: Params$Resource$Projects$Instances$Operations$Delete, callback: BodyResponseCallback<Schema$Empty>): void;
        delete(callback: BodyResponseCallback<Schema$Empty>): void;
        /**
         * spanner.projects.instances.operations.get
         * @desc Gets the latest state of a long-running operation.  Clients can use
         * this method to poll the operation result at intervals as recommended by
         * the API service.
         * @alias spanner.projects.instances.operations.get
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string} params.name The name of the operation resource.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        get(params?: Params$Resource$Projects$Instances$Operations$Get, options?: MethodOptions): GaxiosPromise<Schema$Operation>;
        get(params: Params$Resource$Projects$Instances$Operations$Get, options: MethodOptions | BodyResponseCallback<Schema$Operation>, callback: BodyResponseCallback<Schema$Operation>): void;
        get(params: Params$Resource$Projects$Instances$Operations$Get, callback: BodyResponseCallback<Schema$Operation>): void;
        get(callback: BodyResponseCallback<Schema$Operation>): void;
        /**
         * spanner.projects.instances.operations.list
         * @desc Lists operations that match the specified filter in the request. If
         * the server doesn't support this method, it returns `UNIMPLEMENTED`. NOTE:
         * the `name` binding allows API services to override the binding to use
         * different resource name schemes, such as `users/x/operations`. To
         * override the binding, API services can add a binding such as
         * `"/v1/{name=users/x}/operations"` to their service configuration. For
         * backwards compatibility, the default name includes the operations
         * collection id, however overriding users must ensure the name binding is
         * the parent resource, without the operations collection id.
         * @alias spanner.projects.instances.operations.list
         * @memberOf! ()
         *
         * @param {object} params Parameters for request
         * @param {string=} params.filter The standard list filter.
         * @param {string} params.name The name of the operation's parent resource.
         * @param {integer=} params.pageSize The standard list page size.
         * @param {string=} params.pageToken The standard list page token.
         * @param {object} [options] Optionally override request options, such as `url`, `method`, and `encoding`.
         * @param {callback} callback The callback that handles the response.
         * @return {object} Request object
         */
        list(params?: Params$Resource$Projects$Instances$Operations$List, options?: MethodOptions): GaxiosPromise<Schema$ListOperationsResponse>;
        list(params: Params$Resource$Projects$Instances$Operations$List, options: MethodOptions | BodyResponseCallback<Schema$ListOperationsResponse>, callback: BodyResponseCallback<Schema$ListOperationsResponse>): void;
        list(params: Params$Resource$Projects$Instances$Operations$List, callback: BodyResponseCallback<Schema$ListOperationsResponse>): void;
        list(callback: BodyResponseCallback<Schema$ListOperationsResponse>): void;
    }
    interface Params$Resource$Projects$Instances$Operations$Cancel extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * The name of the operation resource to be cancelled.
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instances$Operations$Delete extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * The name of the operation resource to be deleted.
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instances$Operations$Get extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * The name of the operation resource.
         */
        name?: string;
    }
    interface Params$Resource$Projects$Instances$Operations$List extends StandardParameters {
        /**
         * Auth client or API Key for the request
         */
        auth?: string | OAuth2Client | JWT | Compute | UserRefreshClient;
        /**
         * The standard list filter.
         */
        filter?: string;
        /**
         * The name of the operation's parent resource.
         */
        name?: string;
        /**
         * The standard list page size.
         */
        pageSize?: number;
        /**
         * The standard list page token.
         */
        pageToken?: string;
    }
}