/// Arrow schema as specified in
/// <https://arrow.apache.org/docs/python/api/datatypes.html>
/// and serialized to bytes using IPC:
/// <https://arrow.apache.org/docs/format/Columnar.html#serialization-and-interprocess-communication-ipc>
///
/// See code samples on how this message can be deserialized.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct ArrowSchema {
    /// IPC serialized Arrow schema.
    #[prost(bytes = "vec", tag = "1")]
    pub serialized_schema: ::prost::alloc::vec::Vec<u8>,
}
/// Arrow RecordBatch.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct ArrowRecordBatch {
    /// IPC-serialized Arrow RecordBatch.
    #[prost(bytes = "vec", tag = "1")]
    pub serialized_record_batch: ::prost::alloc::vec::Vec<u8>,
    /// The count of rows in `serialized_record_batch`.
    #[prost(int64, tag = "2")]
    pub row_count: i64,
}
/// Contains options specific to Arrow Serialization.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct ArrowSerializationOptions {
    /// The compression codec to use for Arrow buffers in serialized record
    /// batches.
    #[prost(enumeration = "arrow_serialization_options::CompressionCodec", tag = "2")]
    pub buffer_compression: i32,
}
/// Nested message and enum types in `ArrowSerializationOptions`.
pub mod arrow_serialization_options {
    /// Compression codec's supported by Arrow.
    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
    #[repr(i32)]
    pub enum CompressionCodec {
        /// If unspecified no compression will be used.
        CompressionUnspecified = 0,
        /// LZ4 Frame (<https://github.com/lz4/lz4/blob/dev/doc/lz4_Frame_format.md>)
        Lz4Frame = 1,
        /// Zstandard compression.
        Zstd = 2,
    }
}
/// Avro schema.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct AvroSchema {
    /// Json serialized schema, as described at
    /// <https://avro.apache.org/docs/1.8.1/spec.html.>
    #[prost(string, tag = "1")]
    pub schema: ::prost::alloc::string::String,
}
/// Avro rows.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct AvroRows {
    /// Binary serialized rows in a block.
    #[prost(bytes = "vec", tag = "1")]
    pub serialized_binary_rows: ::prost::alloc::vec::Vec<u8>,
    /// The count of rows in the returning block.
    #[prost(int64, tag = "2")]
    pub row_count: i64,
}
/// ProtoSchema describes the schema of the serialized protocol buffer data rows.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct ProtoSchema {
    /// Descriptor for input message.  The provided descriptor must be self
    /// contained, such that data rows sent can be fully decoded using only the
    /// single descriptor.  For data rows that are compositions of multiple
    /// independent messages, this means the descriptor may need to be transformed
    /// to only use nested types:
    /// <https://developers.google.com/protocol-buffers/docs/proto#nested>
    ///
    /// For additional information for how proto types and values map onto BigQuery
    /// see: <https://cloud.google.com/bigquery/docs/write-api#data_type_conversions>
    #[prost(message, optional, tag = "1")]
    pub proto_descriptor: ::core::option::Option<::prost_types::DescriptorProto>,
}
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct ProtoRows {
    /// A sequence of rows serialized as a Protocol Buffer.
    ///
    /// See <https://developers.google.com/protocol-buffers/docs/overview> for more
    /// information on deserializing this field.
    #[prost(bytes = "vec", repeated, tag = "1")]
    pub serialized_rows: ::prost::alloc::vec::Vec<::prost::alloc::vec::Vec<u8>>,
}
/// Schema of a table.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct TableSchema {
    /// Describes the fields in a table.
    #[prost(message, repeated, tag = "1")]
    pub fields: ::prost::alloc::vec::Vec<TableFieldSchema>,
}
/// TableFieldSchema defines a single field/column within a table schema.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct TableFieldSchema {
    /// Required. The field name. The name must contain only letters (a-z, A-Z),
    /// numbers (0-9), or underscores (_), and must start with a letter or
    /// underscore. The maximum length is 128 characters.
    #[prost(string, tag = "1")]
    pub name: ::prost::alloc::string::String,
    /// Required. The field data type.
    #[prost(enumeration = "table_field_schema::Type", tag = "2")]
    pub r#type: i32,
    /// Optional. The field mode. The default value is NULLABLE.
    #[prost(enumeration = "table_field_schema::Mode", tag = "3")]
    pub mode: i32,
    /// Optional. Describes the nested schema fields if the type property is set to STRUCT.
    #[prost(message, repeated, tag = "4")]
    pub fields: ::prost::alloc::vec::Vec<TableFieldSchema>,
    /// Optional. The field description. The maximum length is 1,024 characters.
    #[prost(string, tag = "6")]
    pub description: ::prost::alloc::string::String,
    /// Optional. Maximum length of values of this field for STRINGS or BYTES.
    ///
    /// If max_length is not specified, no maximum length constraint is imposed
    /// on this field.
    ///
    /// If type = "STRING", then max_length represents the maximum UTF-8
    /// length of strings in this field.
    ///
    /// If type = "BYTES", then max_length represents the maximum number of
    /// bytes in this field.
    ///
    /// It is invalid to set this field if type is not "STRING" or "BYTES".
    #[prost(int64, tag = "7")]
    pub max_length: i64,
    /// Optional. Precision (maximum number of total digits in base 10) and scale
    /// (maximum number of digits in the fractional part in base 10) constraints
    /// for values of this field for NUMERIC or BIGNUMERIC.
    ///
    /// It is invalid to set precision or scale if type is not "NUMERIC" or
    /// "BIGNUMERIC".
    ///
    /// If precision and scale are not specified, no value range constraint is
    /// imposed on this field insofar as values are permitted by the type.
    ///
    /// Values of this NUMERIC or BIGNUMERIC field must be in this range when:
    ///
    /// * Precision (P) and scale (S) are specified:
    ///   [-10^(P-S) + 10^(-S), 10^(P-S) - 10^(-S)]
    /// * Precision (P) is specified but not scale (and thus scale is
    ///   interpreted to be equal to zero):
    ///   [-10^P + 1, 10^P - 1].
    ///
    /// Acceptable values for precision and scale if both are specified:
    ///
    /// * If type = "NUMERIC":
    ///   1 <= precision - scale <= 29 and 0 <= scale <= 9.
    /// * If type = "BIGNUMERIC":
    ///   1 <= precision - scale <= 38 and 0 <= scale <= 38.
    ///
    /// Acceptable values for precision if only precision is specified but not
    /// scale (and thus scale is interpreted to be equal to zero):
    ///
    /// * If type = "NUMERIC": 1 <= precision <= 29.
    /// * If type = "BIGNUMERIC": 1 <= precision <= 38.
    ///
    /// If scale is specified but not precision, then it is invalid.
    #[prost(int64, tag = "8")]
    pub precision: i64,
    /// Optional. See documentation for precision.
    #[prost(int64, tag = "9")]
    pub scale: i64,
}
/// Nested message and enum types in `TableFieldSchema`.
pub mod table_field_schema {
    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
    #[repr(i32)]
    pub enum Type {
        /// Illegal value
        Unspecified = 0,
        /// 64K, UTF8
        String = 1,
        /// 64-bit signed
        Int64 = 2,
        /// 64-bit IEEE floating point
        Double = 3,
        /// Aggregate type
        Struct = 4,
        /// 64K, Binary
        Bytes = 5,
        /// 2-valued
        Bool = 6,
        /// 64-bit signed usec since UTC epoch
        Timestamp = 7,
        /// Civil date - Year, Month, Day
        Date = 8,
        /// Civil time - Hour, Minute, Second, Microseconds
        Time = 9,
        /// Combination of civil date and civil time
        Datetime = 10,
        /// Geography object
        Geography = 11,
        /// Numeric value
        Numeric = 12,
        /// BigNumeric value
        Bignumeric = 13,
        /// Interval
        Interval = 14,
        /// JSON, String
        Json = 15,
    }
    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
    #[repr(i32)]
    pub enum Mode {
        /// Illegal value
        Unspecified = 0,
        Nullable = 1,
        Required = 2,
        Repeated = 3,
    }
}
/// Information about the ReadSession.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct ReadSession {
    /// Output only. Unique identifier for the session, in the form
    /// `projects/{project_id}/locations/{location}/sessions/{session_id}`.
    #[prost(string, tag = "1")]
    pub name: ::prost::alloc::string::String,
    /// Output only. Time at which the session becomes invalid. After this time, subsequent
    /// requests to read this Session will return errors. The expire_time is
    /// automatically assigned and currently cannot be specified or updated.
    #[prost(message, optional, tag = "2")]
    pub expire_time: ::core::option::Option<::prost_types::Timestamp>,
    /// Immutable. Data format of the output data.
    #[prost(enumeration = "DataFormat", tag = "3")]
    pub data_format: i32,
    /// Immutable. Table that this ReadSession is reading from, in the form
    /// `projects/{project_id}/datasets/{dataset_id}/tables/{table_id}`
    #[prost(string, tag = "6")]
    pub table: ::prost::alloc::string::String,
    /// Optional. Any modifiers which are applied when reading from the specified table.
    #[prost(message, optional, tag = "7")]
    pub table_modifiers: ::core::option::Option<read_session::TableModifiers>,
    /// Optional. Read options for this session (e.g. column selection, filters).
    #[prost(message, optional, tag = "8")]
    pub read_options: ::core::option::Option<read_session::TableReadOptions>,
    /// Output only. A list of streams created with the session.
    ///
    /// At least one stream is created with the session. In the future, larger
    /// request_stream_count values *may* result in this list being unpopulated,
    /// in that case, the user will need to use a List method to get the streams
    /// instead, which is not yet available.
    #[prost(message, repeated, tag = "10")]
    pub streams: ::prost::alloc::vec::Vec<ReadStream>,
    /// Output only. An estimate on the number of bytes this session will scan when
    /// all streams are completely consumed. This estimate is based on
    /// metadata from the table which might be incomplete or stale.
    #[prost(int64, tag = "12")]
    pub estimated_total_bytes_scanned: i64,
    /// The schema for the read. If read_options.selected_fields is set, the
    /// schema may be different from the table schema as it will only contain
    /// the selected fields.
    #[prost(oneof = "read_session::Schema", tags = "4, 5")]
    pub schema: ::core::option::Option<read_session::Schema>,
}
/// Nested message and enum types in `ReadSession`.
pub mod read_session {
    /// Additional attributes when reading a table.
    #[derive(Clone, PartialEq, ::prost::Message)]
    pub struct TableModifiers {
        /// The snapshot time of the table. If not set, interpreted as now.
        #[prost(message, optional, tag = "1")]
        pub snapshot_time: ::core::option::Option<::prost_types::Timestamp>,
    }
    /// Options dictating how we read a table.
    #[derive(Clone, PartialEq, ::prost::Message)]
    pub struct TableReadOptions {
        /// Names of the fields in the table that should be read. If empty, all
        /// fields will be read. If the specified field is a nested field, all
        /// the sub-fields in the field will be selected. The output field order is
        /// unrelated to the order of fields in selected_fields.
        #[prost(string, repeated, tag = "1")]
        pub selected_fields: ::prost::alloc::vec::Vec<::prost::alloc::string::String>,
        /// SQL text filtering statement, similar to a WHERE clause in a query.
        /// Aggregates are not supported.
        ///
        /// Examples: "int_field > 5"
        ///           "date_field = CAST('2014-9-27' as DATE)"
        ///           "nullable_field is not NULL"
        ///           "st_equals(geo_field, st_geofromtext("POINT(2, 2)"))"
        ///           "numeric_field BETWEEN 1.0 AND 5.0"
        ///
        /// Restricted to a maximum length for 1 MB.
        #[prost(string, tag = "2")]
        pub row_restriction: ::prost::alloc::string::String,
        #[prost(oneof = "table_read_options::OutputFormatSerializationOptions", tags = "3")]
        pub output_format_serialization_options:
            ::core::option::Option<table_read_options::OutputFormatSerializationOptions>,
    }
    /// Nested message and enum types in `TableReadOptions`.
    pub mod table_read_options {
        #[derive(Clone, PartialEq, ::prost::Oneof)]
        pub enum OutputFormatSerializationOptions {
            /// Optional. Options specific to the Apache Arrow output format.
            #[prost(message, tag = "3")]
            ArrowSerializationOptions(super::super::ArrowSerializationOptions),
        }
    }
    /// The schema for the read. If read_options.selected_fields is set, the
    /// schema may be different from the table schema as it will only contain
    /// the selected fields.
    #[derive(Clone, PartialEq, ::prost::Oneof)]
    pub enum Schema {
        /// Output only. Avro schema.
        #[prost(message, tag = "4")]
        AvroSchema(super::AvroSchema),
        /// Output only. Arrow schema.
        #[prost(message, tag = "5")]
        ArrowSchema(super::ArrowSchema),
    }
}
/// Information about a single stream that gets data out of the storage system.
/// Most of the information about `ReadStream` instances is aggregated, making
/// `ReadStream` lightweight.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct ReadStream {
    /// Output only. Name of the stream, in the form
    /// `projects/{project_id}/locations/{location}/sessions/{session_id}/streams/{stream_id}`.
    #[prost(string, tag = "1")]
    pub name: ::prost::alloc::string::String,
}
/// Information about a single stream that gets data inside the storage system.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct WriteStream {
    /// Output only. Name of the stream, in the form
    /// `projects/{project}/datasets/{dataset}/tables/{table}/streams/{stream}`.
    #[prost(string, tag = "1")]
    pub name: ::prost::alloc::string::String,
    /// Immutable. Type of the stream.
    #[prost(enumeration = "write_stream::Type", tag = "2")]
    pub r#type: i32,
    /// Output only. Create time of the stream. For the _default stream, this is the
    /// creation_time of the table.
    #[prost(message, optional, tag = "3")]
    pub create_time: ::core::option::Option<::prost_types::Timestamp>,
    /// Output only. Commit time of the stream.
    /// If a stream is of `COMMITTED` type, then it will have a commit_time same as
    /// `create_time`. If the stream is of `PENDING` type, empty commit_time
    /// means it is not committed.
    #[prost(message, optional, tag = "4")]
    pub commit_time: ::core::option::Option<::prost_types::Timestamp>,
    /// Output only. The schema of the destination table. It is only returned in
    /// `CreateWriteStream` response. Caller should generate data that's
    /// compatible with this schema to send in initial `AppendRowsRequest`.
    /// The table schema could go out of date during the life time of the stream.
    #[prost(message, optional, tag = "5")]
    pub table_schema: ::core::option::Option<TableSchema>,
}
/// Nested message and enum types in `WriteStream`.
pub mod write_stream {
    /// Type enum of the stream.
    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
    #[repr(i32)]
    pub enum Type {
        /// Unknown type.
        Unspecified = 0,
        /// Data will commit automatically and appear as soon as the write is
        /// acknowledged.
        Committed = 1,
        /// Data is invisible until the stream is committed.
        Pending = 2,
        /// Data is only visible up to the offset to which it was flushed.
        Buffered = 3,
    }
}
/// Data format for input or output data.
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
#[repr(i32)]
pub enum DataFormat {
    Unspecified = 0,
    /// Avro is a standard open source row based file format.
    /// See <https://avro.apache.org/> for more details.
    Avro = 1,
    /// Arrow is a standard open source column-based message format.
    /// See <https://arrow.apache.org/> for more details.
    Arrow = 2,
}
/// Request message for `CreateReadSession`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct CreateReadSessionRequest {
    /// Required. The request project that owns the session, in the form of
    /// `projects/{project_id}`.
    #[prost(string, tag = "1")]
    pub parent: ::prost::alloc::string::String,
    /// Required. Session to be created.
    #[prost(message, optional, tag = "2")]
    pub read_session: ::core::option::Option<ReadSession>,
    /// Max initial number of streams. If unset or zero, the server will
    /// provide a value of streams so as to produce reasonable throughput. Must be
    /// non-negative. The number of streams may be lower than the requested number,
    /// depending on the amount parallelism that is reasonable for the table. Error
    /// will be returned if the max count is greater than the current system
    /// max limit of 1,000.
    ///
    /// Streams must be read starting from offset 0.
    #[prost(int32, tag = "3")]
    pub max_stream_count: i32,
}
/// Request message for `ReadRows`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct ReadRowsRequest {
    /// Required. Stream to read rows from.
    #[prost(string, tag = "1")]
    pub read_stream: ::prost::alloc::string::String,
    /// The offset requested must be less than the last row read from Read.
    /// Requesting a larger offset is undefined. If not specified, start reading
    /// from offset zero.
    #[prost(int64, tag = "2")]
    pub offset: i64,
}
/// Information on if the current connection is being throttled.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct ThrottleState {
    /// How much this connection is being throttled. Zero means no throttling,
    /// 100 means fully throttled.
    #[prost(int32, tag = "1")]
    pub throttle_percent: i32,
}
/// Estimated stream statistics for a given read Stream.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct StreamStats {
    /// Represents the progress of the current stream.
    #[prost(message, optional, tag = "2")]
    pub progress: ::core::option::Option<stream_stats::Progress>,
}
/// Nested message and enum types in `StreamStats`.
pub mod stream_stats {
    #[derive(Clone, PartialEq, ::prost::Message)]
    pub struct Progress {
        /// The fraction of rows assigned to the stream that have been processed by
        /// the server so far, not including the rows in the current response
        /// message.
        ///
        /// This value, along with `at_response_end`, can be used to interpolate
        /// the progress made as the rows in the message are being processed using
        /// the following formula: `at_response_start + (at_response_end -
        /// at_response_start) * rows_processed_from_response / rows_in_response`.
        ///
        /// Note that if a filter is provided, the `at_response_end` value of the
        /// previous response may not necessarily be equal to the
        /// `at_response_start` value of the current response.
        #[prost(double, tag = "1")]
        pub at_response_start: f64,
        /// Similar to `at_response_start`, except that this value includes the
        /// rows in the current response.
        #[prost(double, tag = "2")]
        pub at_response_end: f64,
    }
}
/// Response from calling `ReadRows` may include row data, progress and
/// throttling information.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct ReadRowsResponse {
    /// Number of serialized rows in the rows block.
    #[prost(int64, tag = "6")]
    pub row_count: i64,
    /// Statistics for the stream.
    #[prost(message, optional, tag = "2")]
    pub stats: ::core::option::Option<StreamStats>,
    /// Throttling state. If unset, the latest response still describes
    /// the current throttling status.
    #[prost(message, optional, tag = "5")]
    pub throttle_state: ::core::option::Option<ThrottleState>,
    /// Row data is returned in format specified during session creation.
    #[prost(oneof = "read_rows_response::Rows", tags = "3, 4")]
    pub rows: ::core::option::Option<read_rows_response::Rows>,
    /// The schema for the read. If read_options.selected_fields is set, the
    /// schema may be different from the table schema as it will only contain
    /// the selected fields. This schema is equivelant to the one returned by
    /// CreateSession. This field is only populated in the first ReadRowsResponse
    /// RPC.
    #[prost(oneof = "read_rows_response::Schema", tags = "7, 8")]
    pub schema: ::core::option::Option<read_rows_response::Schema>,
}
/// Nested message and enum types in `ReadRowsResponse`.
pub mod read_rows_response {
    /// Row data is returned in format specified during session creation.
    #[derive(Clone, PartialEq, ::prost::Oneof)]
    pub enum Rows {
        /// Serialized row data in AVRO format.
        #[prost(message, tag = "3")]
        AvroRows(super::AvroRows),
        /// Serialized row data in Arrow RecordBatch format.
        #[prost(message, tag = "4")]
        ArrowRecordBatch(super::ArrowRecordBatch),
    }
    /// The schema for the read. If read_options.selected_fields is set, the
    /// schema may be different from the table schema as it will only contain
    /// the selected fields. This schema is equivelant to the one returned by
    /// CreateSession. This field is only populated in the first ReadRowsResponse
    /// RPC.
    #[derive(Clone, PartialEq, ::prost::Oneof)]
    pub enum Schema {
        /// Output only. Avro schema.
        #[prost(message, tag = "7")]
        AvroSchema(super::AvroSchema),
        /// Output only. Arrow schema.
        #[prost(message, tag = "8")]
        ArrowSchema(super::ArrowSchema),
    }
}
/// Request message for `SplitReadStream`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct SplitReadStreamRequest {
    /// Required. Name of the stream to split.
    #[prost(string, tag = "1")]
    pub name: ::prost::alloc::string::String,
    /// A value in the range (0.0, 1.0) that specifies the fractional point at
    /// which the original stream should be split. The actual split point is
    /// evaluated on pre-filtered rows, so if a filter is provided, then there is
    /// no guarantee that the division of the rows between the new child streams
    /// will be proportional to this fractional value. Additionally, because the
    /// server-side unit for assigning data is collections of rows, this fraction
    /// will always map to a data storage boundary on the server side.
    #[prost(double, tag = "2")]
    pub fraction: f64,
}
/// Response message for `SplitReadStream`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct SplitReadStreamResponse {
    /// Primary stream, which contains the beginning portion of
    /// |original_stream|. An empty value indicates that the original stream can no
    /// longer be split.
    #[prost(message, optional, tag = "1")]
    pub primary_stream: ::core::option::Option<ReadStream>,
    /// Remainder stream, which contains the tail of |original_stream|. An empty
    /// value indicates that the original stream can no longer be split.
    #[prost(message, optional, tag = "2")]
    pub remainder_stream: ::core::option::Option<ReadStream>,
}
/// Request message for `CreateWriteStream`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct CreateWriteStreamRequest {
    /// Required. Reference to the table to which the stream belongs, in the format
    /// of `projects/{project}/datasets/{dataset}/tables/{table}`.
    #[prost(string, tag = "1")]
    pub parent: ::prost::alloc::string::String,
    /// Required. Stream to be created.
    #[prost(message, optional, tag = "2")]
    pub write_stream: ::core::option::Option<WriteStream>,
}
/// Request message for `AppendRows`.
///
/// Due to the nature of AppendRows being a bidirectional streaming RPC, certain
/// parts of the AppendRowsRequest need only be specified for the first request
/// sent each time the gRPC network connection is opened/reopened.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct AppendRowsRequest {
    /// Required. The write_stream identifies the target of the append operation, and only
    /// needs to be specified as part of the first request on the gRPC connection.
    /// If provided for subsequent requests, it must match the value of the first
    /// request.
    ///
    /// For explicitly created write streams, the format is:
    /// `projects/{project}/datasets/{dataset}/tables/{table}/streams/{id}`
    ///
    /// For the special default stream, the format is:
    /// `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
    #[prost(string, tag = "1")]
    pub write_stream: ::prost::alloc::string::String,
    /// If present, the write is only performed if the next append offset is same
    /// as the provided value. If not present, the write is performed at the
    /// current end of stream. Specifying a value for this field is not allowed
    /// when calling AppendRows for the '_default' stream.
    #[prost(message, optional, tag = "2")]
    pub offset: ::core::option::Option<i64>,
    /// Id set by client to annotate its identity. Only initial request setting is
    /// respected.
    #[prost(string, tag = "6")]
    pub trace_id: ::prost::alloc::string::String,
    /// Input rows. The `writer_schema` field must be specified at the initial
    /// request and currently, it will be ignored if specified in following
    /// requests. Following requests must have data in the same format as the
    /// initial request.
    #[prost(oneof = "append_rows_request::Rows", tags = "4")]
    pub rows: ::core::option::Option<append_rows_request::Rows>,
}
/// Nested message and enum types in `AppendRowsRequest`.
pub mod append_rows_request {
    /// ProtoData contains the data rows and schema when constructing append
    /// requests.
    #[derive(Clone, PartialEq, ::prost::Message)]
    pub struct ProtoData {
        /// Proto schema used to serialize the data.  This value only needs to be
        /// provided as part of the first request on a gRPC network connection,
        /// and will be ignored for subsequent requests on the connection.
        #[prost(message, optional, tag = "1")]
        pub writer_schema: ::core::option::Option<super::ProtoSchema>,
        /// Serialized row data in protobuf message format.
        /// Currently, the backend expects the serialized rows to adhere to
        /// proto2 semantics when appending rows, particularly with respect to
        /// how default values are encoded.
        #[prost(message, optional, tag = "2")]
        pub rows: ::core::option::Option<super::ProtoRows>,
    }
    /// Input rows. The `writer_schema` field must be specified at the initial
    /// request and currently, it will be ignored if specified in following
    /// requests. Following requests must have data in the same format as the
    /// initial request.
    #[derive(Clone, PartialEq, ::prost::Oneof)]
    pub enum Rows {
        /// Rows in proto format.
        #[prost(message, tag = "4")]
        ProtoRows(ProtoData),
    }
}
/// Response message for `AppendRows`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct AppendRowsResponse {
    /// If backend detects a schema update, pass it to user so that user can
    /// use it to input new type of message. It will be empty when no schema
    /// updates have occurred.
    #[prost(message, optional, tag = "3")]
    pub updated_schema: ::core::option::Option<TableSchema>,
    #[prost(oneof = "append_rows_response::Response", tags = "1, 2")]
    pub response: ::core::option::Option<append_rows_response::Response>,
}
/// Nested message and enum types in `AppendRowsResponse`.
pub mod append_rows_response {
    /// AppendResult is returned for successful append requests.
    #[derive(Clone, PartialEq, ::prost::Message)]
    pub struct AppendResult {
        /// The row offset at which the last append occurred. The offset will not be
        /// set if appending using default streams.
        #[prost(message, optional, tag = "1")]
        pub offset: ::core::option::Option<i64>,
    }
    #[derive(Clone, PartialEq, ::prost::Oneof)]
    pub enum Response {
        /// Result if the append is successful.
        #[prost(message, tag = "1")]
        AppendResult(AppendResult),
        /// Error returned when problems were encountered.  If present,
        /// it indicates rows were not accepted into the system.
        /// Users can retry or continue with other append requests within the
        /// same connection.
        ///
        /// Additional information about error signalling:
        ///
        /// ALREADY_EXISTS: Happens when an append specified an offset, and the
        /// backend already has received data at this offset.  Typically encountered
        /// in retry scenarios, and can be ignored.
        ///
        /// OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
        /// the current end of the stream.
        ///
        /// INVALID_ARGUMENT: Indicates a malformed request or data.
        ///
        /// ABORTED: Request processing is aborted because of prior failures.  The
        /// request can be retried if previous failure is addressed.
        ///
        /// INTERNAL: Indicates server side error(s) that can be retried.
        #[prost(message, tag = "2")]
        Error(super::super::super::super::super::rpc::Status),
    }
}
/// Request message for `GetWriteStreamRequest`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct GetWriteStreamRequest {
    /// Required. Name of the stream to get, in the form of
    /// `projects/{project}/datasets/{dataset}/tables/{table}/streams/{stream}`.
    #[prost(string, tag = "1")]
    pub name: ::prost::alloc::string::String,
}
/// Request message for `BatchCommitWriteStreams`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct BatchCommitWriteStreamsRequest {
    /// Required. Parent table that all the streams should belong to, in the form of
    /// `projects/{project}/datasets/{dataset}/tables/{table}`.
    #[prost(string, tag = "1")]
    pub parent: ::prost::alloc::string::String,
    /// Required. The group of streams that will be committed atomically.
    #[prost(string, repeated, tag = "2")]
    pub write_streams: ::prost::alloc::vec::Vec<::prost::alloc::string::String>,
}
/// Response message for `BatchCommitWriteStreams`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct BatchCommitWriteStreamsResponse {
    /// The time at which streams were committed in microseconds granularity.
    /// This field will only exist when there are no stream errors.
    /// **Note** if this field is not set, it means the commit was not successful.
    #[prost(message, optional, tag = "1")]
    pub commit_time: ::core::option::Option<::prost_types::Timestamp>,
    /// Stream level error if commit failed. Only streams with error will be in
    /// the list.
    /// If empty, there is no error and all streams are committed successfully.
    /// If non empty, certain streams have errors and ZERO stream is committed due
    /// to atomicity guarantee.
    #[prost(message, repeated, tag = "2")]
    pub stream_errors: ::prost::alloc::vec::Vec<StorageError>,
}
/// Request message for invoking `FinalizeWriteStream`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct FinalizeWriteStreamRequest {
    /// Required. Name of the stream to finalize, in the form of
    /// `projects/{project}/datasets/{dataset}/tables/{table}/streams/{stream}`.
    #[prost(string, tag = "1")]
    pub name: ::prost::alloc::string::String,
}
/// Response message for `FinalizeWriteStream`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct FinalizeWriteStreamResponse {
    /// Number of rows in the finalized stream.
    #[prost(int64, tag = "1")]
    pub row_count: i64,
}
/// Request message for `FlushRows`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct FlushRowsRequest {
    /// Required. The stream that is the target of the flush operation.
    #[prost(string, tag = "1")]
    pub write_stream: ::prost::alloc::string::String,
    /// Ending offset of the flush operation. Rows before this offset(including
    /// this offset) will be flushed.
    #[prost(message, optional, tag = "2")]
    pub offset: ::core::option::Option<i64>,
}
/// Respond message for `FlushRows`.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct FlushRowsResponse {
    /// The rows before this offset (including this offset) are flushed.
    #[prost(int64, tag = "1")]
    pub offset: i64,
}
/// Structured custom BigQuery Storage error message. The error can be attached
/// as error details in the returned rpc Status. In particular, the use of error
/// codes allows more structured error handling, and reduces the need to evaluate
/// unstructured error text strings.
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct StorageError {
    /// BigQuery Storage specific error code.
    #[prost(enumeration = "storage_error::StorageErrorCode", tag = "1")]
    pub code: i32,
    /// Name of the failed entity.
    #[prost(string, tag = "2")]
    pub entity: ::prost::alloc::string::String,
    /// Message that describes the error.
    #[prost(string, tag = "3")]
    pub error_message: ::prost::alloc::string::String,
}
/// Nested message and enum types in `StorageError`.
pub mod storage_error {
    /// Error code for `StorageError`.
    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, ::prost::Enumeration)]
    #[repr(i32)]
    pub enum StorageErrorCode {
        /// Default error.
        Unspecified = 0,
        /// Table is not found in the system.
        TableNotFound = 1,
        /// Stream is already committed.
        StreamAlreadyCommitted = 2,
        /// Stream is not found.
        StreamNotFound = 3,
        /// Invalid Stream type.
        /// For example, you try to commit a stream that is not pending.
        InvalidStreamType = 4,
        /// Invalid Stream state.
        /// For example, you try to commit a stream that is not finalized or is
        /// garbaged.
        InvalidStreamState = 5,
        /// Stream is finalized.
        StreamFinalized = 6,
        /// There is a schema mismatch and it is caused by user schema has extra
        /// field than bigquery schema.
        SchemaMismatchExtraFields = 7,
    }
}
#[doc = r" Generated client implementations."]
pub mod big_query_read_client {
    #![allow(unused_variables, dead_code, missing_docs, clippy::let_unit_value)]
    use tonic::codegen::*;
    #[doc = " BigQuery Read API."]
    #[doc = ""]
    #[doc = " The Read API can be used to read data from BigQuery."]
    #[derive(Debug, Clone)]
    pub struct BigQueryReadClient<T> {
        inner: tonic::client::Grpc<T>,
    }
    impl<T> BigQueryReadClient<T>
    where
        T: tonic::client::GrpcService<tonic::body::BoxBody>,
        T::ResponseBody: Body + Send + 'static,
        T::Error: Into<StdError>,
        <T::ResponseBody as Body>::Error: Into<StdError> + Send,
    {
        pub fn new(inner: T) -> Self {
            let inner = tonic::client::Grpc::new(inner);
            Self { inner }
        }
        pub fn with_interceptor<F>(
            inner: T,
            interceptor: F,
        ) -> BigQueryReadClient<InterceptedService<T, F>>
        where
            F: tonic::service::Interceptor,
            T: tonic::codegen::Service<
                http::Request<tonic::body::BoxBody>,
                Response = http::Response<
                    <T as tonic::client::GrpcService<tonic::body::BoxBody>>::ResponseBody,
                >,
            >,
            <T as tonic::codegen::Service<http::Request<tonic::body::BoxBody>>>::Error:
                Into<StdError> + Send + Sync,
        {
            BigQueryReadClient::new(InterceptedService::new(inner, interceptor))
        }
        #[doc = r" Compress requests with `gzip`."]
        #[doc = r""]
        #[doc = r" This requires the server to support it otherwise it might respond with an"]
        #[doc = r" error."]
        pub fn send_gzip(mut self) -> Self {
            self.inner = self.inner.send_gzip();
            self
        }
        #[doc = r" Enable decompressing responses with `gzip`."]
        pub fn accept_gzip(mut self) -> Self {
            self.inner = self.inner.accept_gzip();
            self
        }
        #[doc = " Creates a new read session. A read session divides the contents of a"]
        #[doc = " BigQuery table into one or more streams, which can then be used to read"]
        #[doc = " data from the table. The read session also specifies properties of the"]
        #[doc = " data to be read, such as a list of columns or a push-down filter describing"]
        #[doc = " the rows to be returned."]
        #[doc = ""]
        #[doc = " A particular row can be read by at most one stream. When the caller has"]
        #[doc = " reached the end of each stream in the session, then all the data in the"]
        #[doc = " table has been read."]
        #[doc = ""]
        #[doc = " Data is assigned to each stream such that roughly the same number of"]
        #[doc = " rows can be read from each stream. Because the server-side unit for"]
        #[doc = " assigning data is collections of rows, the API does not guarantee that"]
        #[doc = " each stream will return the same number or rows. Additionally, the"]
        #[doc = " limits are enforced based on the number of pre-filtered rows, so some"]
        #[doc = " filters can lead to lopsided assignments."]
        #[doc = ""]
        #[doc = " Read sessions automatically expire 6 hours after they are created and do"]
        #[doc = " not require manual clean-up by the caller."]
        pub async fn create_read_session(
            &mut self,
            request: impl tonic::IntoRequest<super::CreateReadSessionRequest>,
        ) -> Result<tonic::Response<super::ReadSession>, tonic::Status> {
            self.inner.ready().await.map_err(|e| {
                tonic::Status::new(
                    tonic::Code::Unknown,
                    format!("Service was not ready: {}", e.into()),
                )
            })?;
            let codec = tonic::codec::ProstCodec::default();
            let path = http::uri::PathAndQuery::from_static(
                "/google.cloud.bigquery.storage.v1.BigQueryRead/CreateReadSession",
            );
            self.inner.unary(request.into_request(), path, codec).await
        }
        #[doc = " Reads rows from the stream in the format prescribed by the ReadSession."]
        #[doc = " Each response contains one or more table rows, up to a maximum of 100 MiB"]
        #[doc = " per response; read requests which attempt to read individual rows larger"]
        #[doc = " than 100 MiB will fail."]
        #[doc = ""]
        #[doc = " Each request also returns a set of stream statistics reflecting the current"]
        #[doc = " state of the stream."]
        pub async fn read_rows(
            &mut self,
            request: impl tonic::IntoRequest<super::ReadRowsRequest>,
        ) -> Result<tonic::Response<tonic::codec::Streaming<super::ReadRowsResponse>>, tonic::Status>
        {
            self.inner.ready().await.map_err(|e| {
                tonic::Status::new(
                    tonic::Code::Unknown,
                    format!("Service was not ready: {}", e.into()),
                )
            })?;
            let codec = tonic::codec::ProstCodec::default();
            let path = http::uri::PathAndQuery::from_static(
                "/google.cloud.bigquery.storage.v1.BigQueryRead/ReadRows",
            );
            self.inner.server_streaming(request.into_request(), path, codec).await
        }
        #[doc = " Splits a given `ReadStream` into two `ReadStream` objects. These"]
        #[doc = " `ReadStream` objects are referred to as the primary and the residual"]
        #[doc = " streams of the split. The original `ReadStream` can still be read from in"]
        #[doc = " the same manner as before. Both of the returned `ReadStream` objects can"]
        #[doc = " also be read from, and the rows returned by both child streams will be"]
        #[doc = " the same as the rows read from the original stream."]
        #[doc = ""]
        #[doc = " Moreover, the two child streams will be allocated back-to-back in the"]
        #[doc = " original `ReadStream`. Concretely, it is guaranteed that for streams"]
        #[doc = " original, primary, and residual, that original[0-j] = primary[0-j] and"]
        #[doc = " original[j-n] = residual[0-m] once the streams have been read to"]
        #[doc = " completion."]
        pub async fn split_read_stream(
            &mut self,
            request: impl tonic::IntoRequest<super::SplitReadStreamRequest>,
        ) -> Result<tonic::Response<super::SplitReadStreamResponse>, tonic::Status> {
            self.inner.ready().await.map_err(|e| {
                tonic::Status::new(
                    tonic::Code::Unknown,
                    format!("Service was not ready: {}", e.into()),
                )
            })?;
            let codec = tonic::codec::ProstCodec::default();
            let path = http::uri::PathAndQuery::from_static(
                "/google.cloud.bigquery.storage.v1.BigQueryRead/SplitReadStream",
            );
            self.inner.unary(request.into_request(), path, codec).await
        }
    }
}
#[doc = r" Generated client implementations."]
pub mod big_query_write_client {
    #![allow(unused_variables, dead_code, missing_docs, clippy::let_unit_value)]
    use tonic::codegen::*;
    #[doc = " BigQuery Write API."]
    #[doc = ""]
    #[doc = " The Write API can be used to write data to BigQuery."]
    #[doc = ""]
    #[doc = " For supplementary information about the Write API, see:"]
    #[doc = " https://cloud.google.com/bigquery/docs/write-api"]
    #[derive(Debug, Clone)]
    pub struct BigQueryWriteClient<T> {
        inner: tonic::client::Grpc<T>,
    }
    impl<T> BigQueryWriteClient<T>
    where
        T: tonic::client::GrpcService<tonic::body::BoxBody>,
        T::ResponseBody: Body + Send + 'static,
        T::Error: Into<StdError>,
        <T::ResponseBody as Body>::Error: Into<StdError> + Send,
    {
        pub fn new(inner: T) -> Self {
            let inner = tonic::client::Grpc::new(inner);
            Self { inner }
        }
        pub fn with_interceptor<F>(
            inner: T,
            interceptor: F,
        ) -> BigQueryWriteClient<InterceptedService<T, F>>
        where
            F: tonic::service::Interceptor,
            T: tonic::codegen::Service<
                http::Request<tonic::body::BoxBody>,
                Response = http::Response<
                    <T as tonic::client::GrpcService<tonic::body::BoxBody>>::ResponseBody,
                >,
            >,
            <T as tonic::codegen::Service<http::Request<tonic::body::BoxBody>>>::Error:
                Into<StdError> + Send + Sync,
        {
            BigQueryWriteClient::new(InterceptedService::new(inner, interceptor))
        }
        #[doc = r" Compress requests with `gzip`."]
        #[doc = r""]
        #[doc = r" This requires the server to support it otherwise it might respond with an"]
        #[doc = r" error."]
        pub fn send_gzip(mut self) -> Self {
            self.inner = self.inner.send_gzip();
            self
        }
        #[doc = r" Enable decompressing responses with `gzip`."]
        pub fn accept_gzip(mut self) -> Self {
            self.inner = self.inner.accept_gzip();
            self
        }
        #[doc = " Creates a write stream to the given table."]
        #[doc = " Additionally, every table has a special stream named '_default'"]
        #[doc = " to which data can be written. This stream doesn't need to be created using"]
        #[doc = " CreateWriteStream. It is a stream that can be used simultaneously by any"]
        #[doc = " number of clients. Data written to this stream is considered committed as"]
        #[doc = " soon as an acknowledgement is received."]
        pub async fn create_write_stream(
            &mut self,
            request: impl tonic::IntoRequest<super::CreateWriteStreamRequest>,
        ) -> Result<tonic::Response<super::WriteStream>, tonic::Status> {
            self.inner.ready().await.map_err(|e| {
                tonic::Status::new(
                    tonic::Code::Unknown,
                    format!("Service was not ready: {}", e.into()),
                )
            })?;
            let codec = tonic::codec::ProstCodec::default();
            let path = http::uri::PathAndQuery::from_static(
                "/google.cloud.bigquery.storage.v1.BigQueryWrite/CreateWriteStream",
            );
            self.inner.unary(request.into_request(), path, codec).await
        }
        #[doc = " Appends data to the given stream."]
        #[doc = ""]
        #[doc = " If `offset` is specified, the `offset` is checked against the end of"]
        #[doc = " stream. The server returns `OUT_OF_RANGE` in `AppendRowsResponse` if an"]
        #[doc = " attempt is made to append to an offset beyond the current end of the stream"]
        #[doc = " or `ALREADY_EXISTS` if user provides an `offset` that has already been"]
        #[doc = " written to. User can retry with adjusted offset within the same RPC"]
        #[doc = " connection. If `offset` is not specified, append happens at the end of the"]
        #[doc = " stream."]
        #[doc = ""]
        #[doc = " The response contains an optional offset at which the append"]
        #[doc = " happened.  No offset information will be returned for appends to a"]
        #[doc = " default stream."]
        #[doc = ""]
        #[doc = " Responses are received in the same order in which requests are sent."]
        #[doc = " There will be one response for each successful inserted request.  Responses"]
        #[doc = " may optionally embed error information if the originating AppendRequest was"]
        #[doc = " not successfully processed."]
        #[doc = ""]
        #[doc = " The specifics of when successfully appended data is made visible to the"]
        #[doc = " table are governed by the type of stream:"]
        #[doc = ""]
        #[doc = " * For COMMITTED streams (which includes the default stream), data is"]
        #[doc = " visible immediately upon successful append."]
        #[doc = ""]
        #[doc = " * For BUFFERED streams, data is made visible via a subsequent `FlushRows`"]
        #[doc = " rpc which advances a cursor to a newer offset in the stream."]
        #[doc = ""]
        #[doc = " * For PENDING streams, data is not made visible until the stream itself is"]
        #[doc = " finalized (via the `FinalizeWriteStream` rpc), and the stream is explicitly"]
        #[doc = " committed via the `BatchCommitWriteStreams` rpc."]
        pub async fn append_rows(
            &mut self,
            request: impl tonic::IntoStreamingRequest<Message = super::AppendRowsRequest>,
        ) -> Result<
            tonic::Response<tonic::codec::Streaming<super::AppendRowsResponse>>,
            tonic::Status,
        > {
            self.inner.ready().await.map_err(|e| {
                tonic::Status::new(
                    tonic::Code::Unknown,
                    format!("Service was not ready: {}", e.into()),
                )
            })?;
            let codec = tonic::codec::ProstCodec::default();
            let path = http::uri::PathAndQuery::from_static(
                "/google.cloud.bigquery.storage.v1.BigQueryWrite/AppendRows",
            );
            self.inner.streaming(request.into_streaming_request(), path, codec).await
        }
        #[doc = " Gets information about a write stream."]
        pub async fn get_write_stream(
            &mut self,
            request: impl tonic::IntoRequest<super::GetWriteStreamRequest>,
        ) -> Result<tonic::Response<super::WriteStream>, tonic::Status> {
            self.inner.ready().await.map_err(|e| {
                tonic::Status::new(
                    tonic::Code::Unknown,
                    format!("Service was not ready: {}", e.into()),
                )
            })?;
            let codec = tonic::codec::ProstCodec::default();
            let path = http::uri::PathAndQuery::from_static(
                "/google.cloud.bigquery.storage.v1.BigQueryWrite/GetWriteStream",
            );
            self.inner.unary(request.into_request(), path, codec).await
        }
        #[doc = " Finalize a write stream so that no new data can be appended to the"]
        #[doc = " stream. Finalize is not supported on the '_default' stream."]
        pub async fn finalize_write_stream(
            &mut self,
            request: impl tonic::IntoRequest<super::FinalizeWriteStreamRequest>,
        ) -> Result<tonic::Response<super::FinalizeWriteStreamResponse>, tonic::Status> {
            self.inner.ready().await.map_err(|e| {
                tonic::Status::new(
                    tonic::Code::Unknown,
                    format!("Service was not ready: {}", e.into()),
                )
            })?;
            let codec = tonic::codec::ProstCodec::default();
            let path = http::uri::PathAndQuery::from_static(
                "/google.cloud.bigquery.storage.v1.BigQueryWrite/FinalizeWriteStream",
            );
            self.inner.unary(request.into_request(), path, codec).await
        }
        #[doc = " Atomically commits a group of `PENDING` streams that belong to the same"]
        #[doc = " `parent` table."]
        #[doc = ""]
        #[doc = " Streams must be finalized before commit and cannot be committed multiple"]
        #[doc = " times. Once a stream is committed, data in the stream becomes available"]
        #[doc = " for read operations."]
        pub async fn batch_commit_write_streams(
            &mut self,
            request: impl tonic::IntoRequest<super::BatchCommitWriteStreamsRequest>,
        ) -> Result<tonic::Response<super::BatchCommitWriteStreamsResponse>, tonic::Status>
        {
            self.inner.ready().await.map_err(|e| {
                tonic::Status::new(
                    tonic::Code::Unknown,
                    format!("Service was not ready: {}", e.into()),
                )
            })?;
            let codec = tonic::codec::ProstCodec::default();
            let path = http::uri::PathAndQuery::from_static(
                "/google.cloud.bigquery.storage.v1.BigQueryWrite/BatchCommitWriteStreams",
            );
            self.inner.unary(request.into_request(), path, codec).await
        }
        #[doc = " Flushes rows to a BUFFERED stream."]
        #[doc = ""]
        #[doc = " If users are appending rows to BUFFERED stream, flush operation is"]
        #[doc = " required in order for the rows to become available for reading. A"]
        #[doc = " Flush operation flushes up to any previously flushed offset in a BUFFERED"]
        #[doc = " stream, to the offset specified in the request."]
        #[doc = ""]
        #[doc = " Flush is not supported on the _default stream, since it is not BUFFERED."]
        pub async fn flush_rows(
            &mut self,
            request: impl tonic::IntoRequest<super::FlushRowsRequest>,
        ) -> Result<tonic::Response<super::FlushRowsResponse>, tonic::Status> {
            self.inner.ready().await.map_err(|e| {
                tonic::Status::new(
                    tonic::Code::Unknown,
                    format!("Service was not ready: {}", e.into()),
                )
            })?;
            let codec = tonic::codec::ProstCodec::default();
            let path = http::uri::PathAndQuery::from_static(
                "/google.cloud.bigquery.storage.v1.BigQueryWrite/FlushRows",
            );
            self.inner.unary(request.into_request(), path, codec).await
        }
    }
}