Struct AppendRowsRequest

pub struct AppendRowsRequest {
    pub write_stream: String,
    pub offset: Option<i64>,
    pub trace_id: String,
    pub missing_value_interpretations: HashMap<String, i32>,
    pub default_missing_value_interpretation: i32,
    pub rows: Option<Rows>,
}

Request message for AppendRows.

Because AppendRows is a bidirectional streaming RPC, certain parts of the AppendRowsRequest need only be specified for the first request before switching table destinations. You can also switch table destinations within the same connection for the default stream.

The size of a single AppendRowsRequest must be less than 10 MB in size. Requests larger than this return an error, typically INVALID_ARGUMENT.

Fields

write_stream: String

Required. The write_stream identifies the append operation. It must be provided in the following scenarios:

• In the first request to an AppendRows connection.

• In all subsequent requests to an AppendRows connection, if you use the same connection to write to multiple tables or change the input schema for default streams.

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}/streams/_default.

An example of a possible sequence of requests with write_stream fields within a single connection:

• r1: {write_stream: stream_name_1}

• r2: {write_stream: /omit/}

• r3: {write_stream: /omit/}

• r4: {write_stream: stream_name_2}

• r5: {write_stream: stream_name_2}

The destination changed in request_4, so the write_stream field must be populated in all subsequent requests in this stream.

offset: Option<i64>

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.

trace_id: String

Id set by client to annotate its identity. Only initial request setting is respected.

missing_value_interpretations: HashMap<String, i32>

A map to indicate how to interpret missing value for some fields. Missing values are fields present in user schema but missing in rows. The key is the field name. The value is the interpretation of missing values for the field.

For example, a map {‘foo’: NULL_VALUE, ‘bar’: DEFAULT_VALUE} means all missing values in field foo are interpreted as NULL, all missing values in field bar are interpreted as the default value of field bar in table schema.

If a field is not in this map and has missing values, the missing values in this field are interpreted as NULL.

This field only applies to the current request, it won’t affect other requests on the connection.

Currently, field name can only be top-level column name, can’t be a struct field path like ‘foo.bar’.

default_missing_value_interpretation: i32

Optional. Default missing value interpretation for all columns in the table. When a value is specified on an AppendRowsRequest, it is applied to all requests on the connection from that point forward, until a subsequent AppendRowsRequest sets it to a different value. missing_value_interpretation can override default_missing_value_interpretation. For example, if you want to write NULL instead of using default values for some columns, you can set default_missing_value_interpretation to DEFAULT_VALUE and at the same time, set missing_value_interpretations to NULL_VALUE on those columns.

rows: Option<Rows>

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.

Implementations

impl AppendRowsRequest

pub fn get_missing_value_interpretations( &self, key: &str, ) -> Option<MissingValueInterpretation>

Returns the enum value for the corresponding key in missing_value_interpretations, or None if the entry does not exist or it is not a valid enum value.

pub fn insert_missing_value_interpretations( &mut self, key: String, value: MissingValueInterpretation, ) -> Option<MissingValueInterpretation>

Inserts a key value pair into missing_value_interpretations.

pub fn default_missing_value_interpretation(&self) -> MissingValueInterpretation

Returns the enum value of default_missing_value_interpretation, or the default if the field is set to an invalid enum value.

pub fn set_default_missing_value_interpretation( &mut self, value: MissingValueInterpretation, )

Sets default_missing_value_interpretation to the provided enum value.

Trait Implementations

impl Clone for AppendRowsRequest

fn clone(&self) -> AppendRowsRequest

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AppendRowsRequest

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for AppendRowsRequest

fn default() -> Self

Returns the “default value” for a type.

impl Message for AppendRowsRequest

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for AppendRowsRequest

fn eq(&self, other: &AppendRowsRequest) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for AppendRowsRequest