// Copyright 2022 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.

syntax = "proto3";

package google.cloud.audit;

import "google/iam/v1/policy.proto";
import "google/protobuf/duration.proto";
import "google/protobuf/timestamp.proto";
import "google/rpc/status.proto";

option csharp_namespace = "Google.Cloud.Audit";
option go_package = "google.golang.org/genproto/googleapis/cloud/audit;audit";
option java_multiple_files = true;
option java_outer_classname = "BigQueryAuditMetadataProto";
option java_package = "com.google.cloud.audit";
option objc_class_prefix = "GCA";
option php_namespace = "Google\\Cloud\\Audit";

// Audit log format for BigQuery cloud audit logs metadata.
//
message BigQueryAuditMetadata {
  // Job insertion event.
  message JobInsertion {
    // Describes how the job was inserted.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Job was inserted using the jobs.insert API.
      JOB_INSERT_REQUEST = 1;

      // Job was inserted using the jobs.query RPC.
      QUERY_REQUEST = 2;
    }

    // Job metadata.
    Job job = 1;

    // Describes how the job was inserted.
    Reason reason = 2;
  }

  // Job state change event.
  message JobChange {
    // Job state before the job state change.
    JobState before = 1;

    // Job state after the job state change.
    JobState after = 2;

    // Job metadata.
    Job job = 3;
  }

  // Job deletion event.
  message JobDeletion {
    // Describes how the job was deleted.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Job was deleted using the jobs.delete API.
      JOB_DELETE_REQUEST = 1;
    }

    // Job URI.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 1;

    // Describes how the job was deleted.
    Reason reason = 2;
  }

  // Dataset creation event.
  message DatasetCreation {
    // Describes how the dataset was created.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Dataset was created using the datasets.create API.
      CREATE = 1;

      // Dataset was created using a query job, e.g., CREATE SCHEMA statement.
      QUERY = 2;
    }

    // Dataset metadata.
    Dataset dataset = 1;

    // Describes how the dataset was created.
    Reason reason = 2;

    // The URI of the job that created the dataset.
    // Present if the reason is QUERY.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 3;
  }

  // Dataset change event.
  message DatasetChange {
    // Describes how the dataset was changed.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Dataset was changed using the datasets.update or datasets.patch API.
      UPDATE = 1;

      // Dataset was changed using the SetIamPolicy API.
      SET_IAM_POLICY = 2;

      // Dataset was changed using a query job, e.g., ALTER SCHEMA statement.
      QUERY = 3;
    }

    // Dataset metadata after the change.
    Dataset dataset = 1;

    // Describes how the dataset was changed.
    Reason reason = 2;

    // The URI of the job that updated the dataset.
    // Present if the reason is QUERY.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 3;
  }

  // Dataset deletion event.
  message DatasetDeletion {
    // Describes how the dataset was deleted.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Dataset was deleted using the datasets.delete API.
      DELETE = 1;

      // Dataset was deleted using a query job, e.g., DROP SCHEMA statement.
      QUERY = 2;
    }

    // Describes how the dataset was deleted.
    Reason reason = 1;

    // The URI of the job that deleted the dataset.
    // Present if the reason is QUERY.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 2;
  }

  // Table creation event.
  message TableCreation {
    // Describes how the table was created.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Table was created as a destination table during a query, load or copy
      // job.
      JOB = 1;

      // Table was created using a DDL query.
      QUERY = 2;

      // Table was created using the tables.create API.
      TABLE_INSERT_REQUEST = 3;
    }

    // Table metadata.
    Table table = 1;

    // Describes how the table was created.
    Reason reason = 3;

    // The URI of the job that created a table.
    // Present if the reason is JOB or QUERY.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 4;
  }

  // Model creation event.
  message ModelCreation {
    // Describes how the model was created.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Model was created using a DDL query.
      QUERY = 2;
    }

    // Model metadata.
    Model model = 1;

    // Describes how the model was created.
    Reason reason = 3;

    // The URI of the job that created the model.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 4;
  }

  // Routine creation event.
  message RoutineCreation {
    // Describes how the routine was created.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Routine was created using a DDL query.
      QUERY = 1;

      // Routine was created using the routines.create API.
      ROUTINE_INSERT_REQUEST = 2;
    }

    // Created routine.
    Routine routine = 1;

    // Describes how the routine was created.
    Reason reason = 3;

    // The URI of the job that created the routine.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 4;
  }

  // Table data read event.
  message TableDataRead {
    // Describes how the table data was read.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Table was used as a source table during a BigQuery job.
      JOB = 1;

      // Table data was accessed using the tabledata.list API.
      TABLEDATA_LIST_REQUEST = 2;

      // Table data was accessed using the jobs.getQueryResults API.
      GET_QUERY_RESULTS_REQUEST = 3;

      // Table data was accessed using the jobs.query RPC.
      QUERY_REQUEST = 4;

      // Table data was accessed using storage.CreateReadSession API.
      CREATE_READ_SESSION = 5;

      // Table data was accessed during a materialized view refresh.
      MATERIALIZED_VIEW_REFRESH = 6;
    }

    // List of the accessed fields. Entire list is truncated if the record size
    // exceeds 100K.
    repeated string fields = 2;

    // True if the fields list was truncated.
    bool fields_truncated = 8;

    // List of the referenced policy tags. That is, policy tags attached to the
    // accessed fields or their ancestors.
    // Policy tag resource name is a string of the format:
    // `projects/<project_id>/locations/<location_id>/taxonomies/<taxonomy_id>/policyTags/<policy_tag_id>`
    repeated string policy_tags = 9;

    // True if the policy tag list was truncated. At most 100 policy tags can be
    // saved.
    bool policy_tags_truncated = 10;

    // Describes how the table data was read.
    Reason reason = 3;

    // The URI of the job that read a table.
    // Present if the reason is JOB but can be redacted for privacy reasons.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 4;

    // The URI of the read session that read a table.
    // Present if the reason is CREATE_READ_SESSION.
    //
    // Format:
    // `projects/<project_id>/locations/<location>/sessions/<session_id>`.
    string session_name = 5;
  }

  // Table metadata change event.
  message TableChange {
    // Describes how the table metadata was changed.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Table metadata was updated using the tables.update or tables.patch API.
      TABLE_UPDATE_REQUEST = 1;

      // Table was used as a job destination table.
      JOB = 2;

      // Table metadata was updated using a DML or DDL query.
      QUERY = 3;
    }

    // Updated table metadata.
    Table table = 1;

    // True if the table was truncated.
    bool truncated = 4;

    // Describes how the table metadata was changed.
    Reason reason = 5;

    // The URI of the job that changed a table.
    // Present if the reason is JOB or QUERY.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 6;
  }

  // Model metadata change event.
  message ModelMetadataChange {
    // Describes how the model metadata was changed.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Model metadata was updated using the models.patch API.
      MODEL_PATCH_REQUEST = 1;

      // Model metadata was updated using a DDL query.
      QUERY = 2;
    }

    // Updated model.
    Model model = 1;

    // Describes how the model metadata was changed.
    Reason reason = 2;

    // The URI of the job that changed the model metadata.
    // Present if and only if the reason is QUERY.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 3;
  }

  // Routine change event.
  message RoutineChange {
    // Describes how the routine was updated.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Routine was updated using a DDL query.
      QUERY = 1;

      // Routine was updated using the routines.update or routines.patch API.
      ROUTINE_UPDATE_REQUEST = 2;
    }

    // Updated routine.
    Routine routine = 1;

    // Describes how the routine was updated.
    Reason reason = 3;

    // The URI of the job that updated the routine.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 4;
  }

  // Table data change event.
  message TableDataChange {
    // Describes how the table data was changed.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Table was used as a job destination table.
      JOB = 1;

      // Table data was updated using a DML or DDL query.
      QUERY = 2;

      // Table data was updated during a materialized view refresh.
      MATERIALIZED_VIEW_REFRESH = 3;

      // Table data was added using the Write API.
      WRITE_API = 4;
    }

    // Number of deleted rows.
    int64 deleted_rows_count = 1;

    // Number of inserted rows.
    int64 inserted_rows_count = 2;

    // True if the table was truncated.
    bool truncated = 3;

    // Describes how the table data was changed.
    Reason reason = 4;

    // The URI of the job that changed a table.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 5;

    // If written from WRITE_API, the name of the stream.
    //
    // Format:
    // `projects/<project_id>/datasets/<dataset_id>/tables/<table_id>/streams/<stream_id>`
    string stream_name = 6;
  }

  // Model data change event.
  message ModelDataChange {
    // Describes how the model data was changed.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Model data was changed using a DDL query.
      QUERY = 1;
    }

    // Describes how the model data was changed.
    Reason reason = 1;

    // The URI of the job that changed the model data.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 2;
  }

  // Model data read event.
  message ModelDataRead {
    // Describes how the model data was read.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Model was used as a source model during a BigQuery job.
      JOB = 1;
    }

    // Describes how the model data was read.
    Reason reason = 1;

    // The URI of the job that read the model data.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 2;
  }

  // Table deletion event.
  message TableDeletion {
    // Describes how the table was deleted.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Table was deleted using the tables.delete API.
      TABLE_DELETE_REQUEST = 2;

      // Table expired.
      EXPIRED = 3;

      // Table deleted using a DDL query.
      QUERY = 4;
    }

    // Describes how table was deleted.
    Reason reason = 1;

    // The URI of the job that deleted a table.
    // Present if the reason is QUERY.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 2;
  }

  // Model deletion event.
  message ModelDeletion {
    // Describes how the model was deleted.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Model was deleted using the models.delete API.
      MODEL_DELETE_REQUEST = 1;

      // Model expired.
      EXPIRED = 2;

      // Model was deleted using DDL query.
      QUERY = 3;
    }

    // Describes how the model was deleted.
    Reason reason = 1;

    // The URI of the job that deleted a model.
    // Present if the reason is QUERY.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 2;
  }

  // Routine deletion event.
  message RoutineDeletion {
    // Describes how the routine was deleted.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Routine was deleted using DDL query.
      QUERY = 1;

      // Routine was deleted using the API.
      ROUTINE_DELETE_REQUEST = 2;
    }

    // Deleted routine.
    Routine routine = 1;

    // Describes how the routine was deleted.
    Reason reason = 3;

    // The URI of the job that deleted the routine.
    // Present if the reason is QUERY.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 4;
  }

  // Row access policy creation event.
  message RowAccessPolicyCreation {
    // The row access policy created by this event.
    RowAccessPolicy row_access_policy = 1;

    // The URI of the job that created this row access policy.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 2;
  }

  // Row access policy change event.
  message RowAccessPolicyChange {
    // The row access policy that was changed by this event.
    RowAccessPolicy row_access_policy = 1;

    // The URI of the job that created this row access policy.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 2;
  }

  // Row access policy deletion event.
  message RowAccessPolicyDeletion {
    // The row access policies that were deleted. At present, only populated
    // when a single policy is dropped.
    repeated RowAccessPolicy row_access_policies = 1;

    // The job that deleted these row access policies.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 2;

    // This field is set to true when a DROP ALL command has been executed, thus
    // removing all row access policies on the table.
    bool all_row_access_policies_dropped = 3;
  }

  // Unlink linked dataset from its source dataset event
  message UnlinkDataset {
    // Describes how the unlinking operation occurred.
    enum Reason {
      // Unknown.
      REASON_UNSPECIFIED = 0;

      // Linked dataset unlinked via API
      UNLINK_API = 1;
    }

    // The linked dataset URI which is unlinked from its source.
    //
    // Format: `projects/<project_id>/datasets/<dataset_id>`.
    string linked_dataset = 1;

    // The source dataset URI from which the linked dataset is unlinked.
    //
    // Format: `projects/<project_id>/datasets/<dataset_id>`.
    string source_dataset = 2;

    // Reason for unlinking linked dataset
    Reason reason = 3;
  }

  // BigQuery job.
  message Job {
    // Job URI.
    //
    // Format: `projects/<project_id>/jobs/<job_id>`.
    string job_name = 1;

    // Job configuration.
    JobConfig job_config = 2;

    // Job status.
    JobStatus job_status = 3;

    // Job statistics.
    JobStats job_stats = 4;
  }

  // Job configuration.
  // See the [Jobs](https://cloud.google.com/bigquery/docs/reference/v2/jobs)
  // API resource for more details on individual fields.
  message JobConfig {
    // Job type.
    enum Type {
      // Unknown.
      TYPE_UNSPECIFIED = 0;

      // Query job.
      QUERY = 1;

      // Table copy job.
      COPY = 2;

      // Export (extract) job.
      EXPORT = 3;

      // Import (load) job.
      IMPORT = 4;
    }

    // Query job configuration.
    message Query {
      // Priority given to the query.
      enum Priority {
        // Unknown.
        PRIORITY_UNSPECIFIED = 0;

        // Interactive query.
        QUERY_INTERACTIVE = 1;

        // Batch query.
        QUERY_BATCH = 2;
      }

      // The SQL query to run. Truncated if exceeds 50K.
      string query = 1;

      // True if the query field was truncated.
      bool query_truncated = 10;

      // The destination table for the query results.
      string destination_table = 2;

      // Destination table create disposition.
      CreateDisposition create_disposition = 3;

      // Destination table write disposition.
      WriteDisposition write_disposition = 4;

      // Default dataset for the query.
      string default_dataset = 5;

      // External data sources used in the query.
      repeated TableDefinition table_definitions = 6;

      // Priority given to the query.
      Priority priority = 7;

      // Result table encryption information. Set when non-default encryption is
      // used.
      EncryptionInfo destination_table_encryption = 8;

      // Type of the query.
      QueryStatementType statement_type = 9;
    }

    // Load job configuration.
    message Load {
      // URIs for the data to be imported. Entire list is truncated if exceeds
      // 40K.
      repeated string source_uris = 1;

      // True if the source_URIs field was truncated.
      bool source_uris_truncated = 7;

      // The table schema in JSON format. Entire field is truncated if exceeds
      // 40K.
      string schema_json = 2;

      // True if the schema_json field was truncated.
      bool schema_json_truncated = 8;

      // The destination table for the import.
      string destination_table = 3;

      // Destination table create disposition.
      CreateDisposition create_disposition = 4;

      // Destination table write disposition.
      WriteDisposition write_disposition = 5;

      // Result table encryption information. Set when non-default encryption is
      // used.
      EncryptionInfo destination_table_encryption = 6;
    }

    // Extract job configuration.
    message Extract {
      // URIs where extracted data should be written. Entire list is truncated
      // if exceeds 50K.
      repeated string destination_uris = 1;

      // True if the destination_URIs field was truncated.
      bool destination_uris_truncated = 3;

      oneof source {
        // The source table.
        string source_table = 2;

        // The source model.
        string source_model = 4;
      }
    }

    // Table copy job configuration.
    message TableCopy {
      // Source tables. Entire list is truncated if exceeds 50K.
      repeated string source_tables = 1;

      // True if the source_tables field was truncated.
      bool source_tables_truncated = 6;

      // Destination table.
      string destination_table = 2;

      // Destination table create disposition.
      CreateDisposition create_disposition = 3;

      // Destination table write disposition.
      WriteDisposition write_disposition = 4;

      // Result table encryption information. Set when non-default encryption is
      // used.
      EncryptionInfo destination_table_encryption = 5;

      // Supported operation types in the table copy job.
      OperationType operation_type = 7;

      // Expiration time set on the destination table. Expired tables will be
      // deleted and their storage reclaimed.
      google.protobuf.Timestamp destination_expiration_time = 8;
    }

    // Job type.
    Type type = 1;

    // Job configuration information.
    oneof config {
      // Query job information.
      Query query_config = 2;

      // Load job information.
      Load load_config = 3;

      // Extract job information.
      Extract extract_config = 4;

      // TableCopy job information.
      TableCopy table_copy_config = 5;
    }

    // Labels provided for the job.
    map<string, string> labels = 6;
  }

  // Definition of an external data source used in a query.
  message TableDefinition {
    // Name of the table, used in queries.
    string name = 1;

    // URIs for the data.
    repeated string source_uris = 2;
  }

  // Describes whether a job should create a destination table if it doesn't
  // exist.
  enum CreateDisposition {
    // Unknown.
    CREATE_DISPOSITION_UNSPECIFIED = 0;

    // This job should never create tables.
    CREATE_NEVER = 1;

    // This job should create a table if it doesn't already exist.
    CREATE_IF_NEEDED = 2;
  }

  // Describes whether a job should overwrite or append the existing destination
  // table if it already exists.
  enum WriteDisposition {
    // Unknown.
    WRITE_DISPOSITION_UNSPECIFIED = 0;

    // This job should only be writing to empty tables.
    WRITE_EMPTY = 1;

    // This job will truncate the existing table data.
    WRITE_TRUNCATE = 2;

    // This job will append to the table.
    WRITE_APPEND = 3;
  }

  // Table copy job operation type.
  enum OperationType {
    // Unspecified operation type.
    OPERATION_TYPE_UNSPECIFIED = 0;

    // The source and the destination table have the same table type.
    COPY = 1;

    // The source table type is TABLE and
    // the destination table type is SNAPSHOT.
    SNAPSHOT = 2;

    // The source table type is SNAPSHOT and
    // the destination table type is TABLE.
    RESTORE = 3;
  }

  // State of a job.
  enum JobState {
    // State unknown.
    JOB_STATE_UNSPECIFIED = 0;

    // Job is waiting for the resources.
    PENDING = 1;

    // Job is running.
    RUNNING = 2;

    // Job is done.
    DONE = 3;
  }

  // Type of the statement (e.g. SELECT, INSERT, CREATE_TABLE, CREATE_MODEL..)
  enum QueryStatementType {
    // Unknown.
    QUERY_STATEMENT_TYPE_UNSPECIFIED = 0;

    // SELECT ... FROM &lt;Table list&gt; ...
    SELECT = 1;

    // ASSERT &lt;condition&gt; AS 'description'
    ASSERT = 23;

    // INSERT INTO &lt;Table&gt; ....
    INSERT = 2;

    // UPDATE &lt;Table&gt; SET ...
    UPDATE = 3;

    // DELETE &lt;Table&gt; ...
    DELETE = 4;

    // MERGE INTO &lt;Table&gt; ....
    MERGE = 5;

    // CREATE TABLE &lt;Table&gt; &lt;column list&gt;
    CREATE_TABLE = 6;

    // CREATE TABLE &lt;Table&gt; AS SELECT
    CREATE_TABLE_AS_SELECT = 7;

    // CREATE VIEW &lt;View&gt;
    CREATE_VIEW = 8;

    // CREATE MODEL &lt;Model&gt; AS &lt;Query&gt;
    CREATE_MODEL = 9;

    // CREATE MATERIALIZED VIEW &lt;View&gt; AS ...
    CREATE_MATERIALIZED_VIEW = 13;

    // CREATE FUNCTION &lt;Function&gt;(&lt;Signature&gt;) AS ...
    CREATE_FUNCTION = 14;

    // CREATE TABLE FUNCTION &lt;Function&gt;(&lt;Signature&gt;) AS ...
    CREATE_TABLE_FUNCTION = 56;

    // CREATE PROCEDURE &lt;Procedure&gt;
    CREATE_PROCEDURE = 20;

    // CREATE ROW ACCESS POLICY &lt;RowAccessPolicy&gt ON &lt;Table&gt;
    CREATE_ROW_ACCESS_POLICY = 24;

    // CREATE SCHEMA &lt;Schema&gt;
    CREATE_SCHEMA = 53;

    // CREATE SNAPSHOT TABLE &lt;Snapshot&gt CLONE &lt;Table&gt;
    CREATE_SNAPSHOT_TABLE = 59;

    // DROP TABLE &lt;Table&gt;
    DROP_TABLE = 10;

    // DROP EXTERNAL TABLE &lt;Table&gt;
    DROP_EXTERNAL_TABLE = 33;

    // DROP VIEW &lt;View&gt;
    DROP_VIEW = 11;

    // DROP MODEL &lt;Model&gt;
    DROP_MODEL = 12;

    // DROP MATERIALIZED VIEW &lt;View&gt;
    DROP_MATERIALIZED_VIEW = 15;

    // DROP FUNCTION &lt;Function&gt;
    DROP_FUNCTION = 16;

    // DROP PROCEDURE &lt;Procedure&gt;
    DROP_PROCEDURE = 21;

    // DROP SCHEMA &lt;Schema&gt;
    DROP_SCHEMA = 54;

    // DROP ROW ACCESS POLICY &lt;RowAccessPolicy&gt ON &lt;Table&gt; <or> DROP
    // ALL ROW ACCESS POLICIES ON ON &lt;Table&gt;
    DROP_ROW_ACCESS_POLICY = 25;

    // DROP SNAPSHOT TABLE &lt;Snapshot&gt;
    DROP_SNAPSHOT_TABLE = 62;

    // ALTER TABLE &lt;Table&gt;
    ALTER_TABLE = 17;

    // ALTER VIEW &lt;View&gt;
    ALTER_VIEW = 18;

    // ALTER MATERIALIZED_VIEW &lt;view&gt;
    ALTER_MATERIALIZED_VIEW = 22;

    // ALTER SCHEMA &lt;Schema&gt;
    ALTER_SCHEMA = 55;

    // Script
    SCRIPT = 19;

    // TRUNCATE TABLE &lt;Table&gt;
    TRUNCATE_TABLE = 26;

    // CREATE EXTERNAL TABLE &lt;TABLE&gt;
    CREATE_EXTERNAL_TABLE = 27;

    // EXPORT DATA;
    EXPORT_DATA = 28;

    // CALL &lt;stored procedure&gt;
    CALL = 29;
  }

  // Status of a job.
  message JobStatus {
    // State of the job.
    JobState job_state = 1;

    // Job error, if the job failed.
    google.rpc.Status error_result = 2;

    // Errors encountered during the running of the job. Does not necessarily
    // mean that the job has completed or was unsuccessful.
    repeated google.rpc.Status errors = 3;
  }

  // Job statistics.
  message JobStats {
    // Query job statistics.
    message Query {
      // Total bytes processed by the query job.
      int64 total_processed_bytes = 1;

      // Total bytes billed by the query job.
      int64 total_billed_bytes = 2;

      // The tier assigned by the CPU-based billing.
      int32 billing_tier = 3;

      // Tables accessed by the query job.
      repeated string referenced_tables = 6;

      // Views accessed by the query job.
      repeated string referenced_views = 7;

      // Routines accessed by the query job.
      repeated string referenced_routines = 10;

      // Number of output rows produced by the query job.
      int64 output_row_count = 8;

      // True if the query job results were read from the query cache.
      bool cache_hit = 9;
    }

    // Load job statistics.
    message Load {
      // Total bytes loaded by the import job.
      int64 total_output_bytes = 1;
    }

    // Extract job statistics.
    message Extract {
      // Total bytes exported by the extract job.
      int64 total_input_bytes = 1;
    }

    // Job resource usage breakdown by reservation.
    message ReservationResourceUsage {
      // Reservation name or "unreserved" for on-demand resources usage.
      string name = 1;

      // Total slot milliseconds used by the reservation for a particular job.
      int64 slot_ms = 2;
    }

    // Job creation time.
    google.protobuf.Timestamp create_time = 1;

    // Job execution start time.
    google.protobuf.Timestamp start_time = 2;

    // Job completion time.
    google.protobuf.Timestamp end_time = 3;

    // Statistics specific to the job type.
    oneof extended {
      // Query job statistics.
      Query query_stats = 8;

      // Load job statistics.
      Load load_stats = 9;

      // Extract job statistics.
      Extract extract_stats = 13;
    }

    // The total number of slot-ms consumed by the query job.
    int64 total_slot_ms = 10;

    // Reservation usage attributed from each tier of a reservation hierarchy.
    // This field reported misleading information and will no longer be
    // populated. Aggregate usage of all jobs submitted to a reservation
    // should provide a more reliable indicator of reservation imbalance.
    repeated ReservationResourceUsage reservation_usage = 11
        [deprecated = true];

    // Parent job name. Only present for child jobs.
    string parent_job_name = 12;
  }

  // BigQuery table.
  message Table {
    // Table URI.
    //
    // Format: `projects/<project_id>/datasets/<dataset_id>/tables/<table_id>`.
    string table_name = 1;

    // User-provided metadata for the table.
    EntityInfo table_info = 10;

    // A JSON representation of the table's schema. Entire field is truncated
    // if exceeds 40K.
    string schema_json = 3;

    // True if the schema_json field was truncated.
    bool schema_json_truncated = 11;

    // View metadata. Only present for views.
    TableViewDefinition view = 4;

    // Table expiration time.
    google.protobuf.Timestamp expire_time = 5;

    // The table creation time.
    google.protobuf.Timestamp create_time = 6;

    // The last time metadata update time.
    google.protobuf.Timestamp update_time = 7;

    // The last table truncation time.
    google.protobuf.Timestamp truncate_time = 8;

    // Table encryption information. Set when non-default encryption is used.
    EncryptionInfo encryption = 9;
  }

  // Trained BigQuery ML model.
  message Model {
    // Model URI.
    //
    // Format: `projects/<project_id>/datasets/<dataset_id>/models/<model_id>`.
    string model_name = 1;

    // User-provided metadata for the model.
    EntityInfo model_info = 2;

    // Model expiration time.
    google.protobuf.Timestamp expire_time = 5;

    // Model creation time.
    google.protobuf.Timestamp create_time = 6;

    // Model last update time.
    google.protobuf.Timestamp update_time = 7;

    // Model encryption information. Set when non-default encryption is used.
    EncryptionInfo encryption = 8;
  }

  // User Defined Function (UDF) or Stored Procedure.
  message Routine {
    // Routine URI.
    //
    // Format:
    // `projects/<project_id>/datasets/<dataset_id>/routines/<routine_id>`.
    string routine_name = 1;

    // Routine creation time.
    google.protobuf.Timestamp create_time = 5;

    // Routine last update time.
    google.protobuf.Timestamp update_time = 6;
  }

  // User-provided metadata for an entity, for e.g. dataset, table or model.
  message EntityInfo {
    // A short name for the entity.
    string friendly_name = 1;

    // A long description for the entity.
    string description = 2;

    // Labels provided for the entity.
    map<string, string> labels = 3;
  }

  // View definition.
  message TableViewDefinition {
    // SQL query defining the view. Truncated if exceeds 40K.
    string query = 1;

    // True if the schema_json field was truncated.
    bool query_truncated = 2;
  }

  // BigQuery dataset.
  message Dataset {
    // Dataset URI.
    //
    // Format: `projects/<project_id>/datasets/<dataset_id>`.
    string dataset_name = 1;

    // User-provided metadata for the dataset.
    EntityInfo dataset_info = 7;

    // Dataset creation time.
    google.protobuf.Timestamp create_time = 3;

    // Dataset metadata last update time.
    google.protobuf.Timestamp update_time = 4;

    // The access control list for the dataset.
    BigQueryAcl acl = 5;

    // Default expiration time for tables in the dataset.
    google.protobuf.Duration default_table_expire_duration = 6;

    // Default encryption for tables in the dataset.
    EncryptionInfo default_encryption = 8;

    // Default collation for the dataset.
    string default_collation = 9;
  }

  // An access control list.
  message BigQueryAcl {
    // IAM policy for the resource.
    google.iam.v1.Policy policy = 1;

    // List of authorized views for a dataset.
    //
    // Format: `projects/<project_id>/datasets/<dataset_id>/tables/<view_id>`.
    repeated string authorized_views = 2;
  }

  // Encryption properties for a table or a job
  message EncryptionInfo {
    // Cloud kms key identifier.
    //
    // Format:
    // `projects/<project_id>/locations/<location>/keyRings/<key_ring_name>/cryptoKeys/<key_name>`
    string kms_key_name = 1;
  }

  // BigQuery row access policy.
  message RowAccessPolicy {
    // Row access policy URI.
    //
    // Format:
    // `projects/<project_id>/datasets/<dataset_id>/tables/<table_id>/rowAccessPolicies/<row_access_policy_id>`
    string row_access_policy_name = 1;
  }

  // First party (Google) application specific request metadata.
  message FirstPartyAppMetadata {
    oneof metadata {
      // Google Sheets metadata.
      SheetsMetadata sheets_metadata = 1;
    }
  }

  // Google Sheets specific request metadata.
  message SheetsMetadata {
    // The ID of the spreadsheet from which the request is sent.
    string doc_id = 1;
  }

  // BigQuery event information.
  oneof event {
    // Job insertion event.
    JobInsertion job_insertion = 1;

    // Job state change event.
    JobChange job_change = 2;

    // Job deletion event.
    JobDeletion job_deletion = 23;

    // Dataset creation event.
    DatasetCreation dataset_creation = 3;

    // Dataset change event.
    DatasetChange dataset_change = 4;

    // Dataset deletion event.
    DatasetDeletion dataset_deletion = 5;

    // Table creation event.
    TableCreation table_creation = 6;

    // Table metadata change event.
    TableChange table_change = 8;

    // Table deletion event.
    TableDeletion table_deletion = 9;

    // Table data read event.
    TableDataRead table_data_read = 10;

    // Table data change event.
    TableDataChange table_data_change = 11;

    // Model deletion event.
    ModelDeletion model_deletion = 12;

    // Model creation event.
    ModelCreation model_creation = 13;

    // Model metadata change event.
    ModelMetadataChange model_metadata_change = 14;

    // Model data change event.
    ModelDataChange model_data_change = 15;

    // Model data read event.
    ModelDataRead model_data_read = 19;

    // Routine creation event.
    RoutineCreation routine_creation = 16;

    // Routine change event.
    RoutineChange routine_change = 17;

    // Routine deletion event.
    RoutineDeletion routine_deletion = 18;

    // Row access policy create event.
    RowAccessPolicyCreation row_access_policy_creation = 20;

    // Row access policy change event.
    RowAccessPolicyChange row_access_policy_change = 21;

    // Row access policy deletion event.
    RowAccessPolicyDeletion row_access_policy_deletion = 22;

    // Unlink linked dataset from its source dataset event
    UnlinkDataset unlink_dataset = 25;
  }

  // First party (Google) application specific metadata.
  FirstPartyAppMetadata first_party_app_metadata = 24;
}