pub struct ReadRequest {
pub session: String,
pub transaction: Option<TransactionSelector>,
pub table: String,
pub index: String,
pub columns: Vec<String>,
pub key_set: Option<KeySet>,
pub limit: i64,
pub resume_token: Vec<u8>,
pub partition_token: Vec<u8>,
}
Expand description
The request for [Read][google.spanner.v1.Spanner.Read] and [StreamingRead][google.spanner.v1.Spanner.StreamingRead].
Fields§
§session: String
Required. The session in which the read should be performed.
transaction: Option<TransactionSelector>
The transaction to use. If none is provided, the default is a temporary read-only transaction with strong concurrency.
table: String
Required. The name of the table in the database to be read.
index: String
If non-empty, the name of an index on [table][google.spanner.v1.ReadRequest.table]. This index is used instead of the table primary key when interpreting [key_set][google.spanner.v1.ReadRequest.key_set] and sorting result rows. See [key_set][google.spanner.v1.ReadRequest.key_set] for further information.
columns: Vec<String>
Required. The columns of [table][google.spanner.v1.ReadRequest.table] to be returned for each row matching this request.
key_set: Option<KeySet>
Required. key_set
identifies the rows to be yielded. key_set
names the
primary keys of the rows in [table][google.spanner.v1.ReadRequest.table] to be yielded, unless [index][google.spanner.v1.ReadRequest.index]
is present. If [index][google.spanner.v1.ReadRequest.index] is present, then [key_set][google.spanner.v1.ReadRequest.key_set] instead names
index keys in [index][google.spanner.v1.ReadRequest.index].
If the [partition_token][google.spanner.v1.ReadRequest.partition_token] field is empty, rows are yielded in table primary key order (if [index][google.spanner.v1.ReadRequest.index] is empty) or index key order (if [index][google.spanner.v1.ReadRequest.index] is non-empty). If the [partition_token][google.spanner.v1.ReadRequest.partition_token] field is not empty, rows will be yielded in an unspecified order.
It is not an error for the key_set
to name rows that do not
exist in the database. Read yields nothing for nonexistent rows.
limit: i64
If greater than zero, only the first limit
rows are yielded. If limit
is zero, the default is no limit. A limit cannot be specified if
partition_token
is set.
resume_token: Vec<u8>
If this request is resuming a previously interrupted read,
resume_token
should be copied from the last
[PartialResultSet][google.spanner.v1.PartialResultSet] yielded before the interruption. Doing this
enables the new read to resume where the last read left off. The
rest of the request parameters must exactly match the request
that yielded this token.
partition_token: Vec<u8>
If present, results will be restricted to the specified partition previously created using PartitionRead(). There must be an exact match for the values of fields common to this message and the PartitionReadRequest message used to create this partition_token.
Trait Implementations§
Source§impl Clone for ReadRequest
impl Clone for ReadRequest
Source§fn clone(&self) -> ReadRequest
fn clone(&self) -> ReadRequest
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreSource§impl Debug for ReadRequest
impl Debug for ReadRequest
Source§impl Default for ReadRequest
impl Default for ReadRequest
Source§fn default() -> ReadRequest
fn default() -> ReadRequest
Source§impl Message for ReadRequest
impl Message for ReadRequest
Source§fn encoded_len(&self) -> usize
fn encoded_len(&self) -> usize
Source§fn encode<B>(&self, buf: &mut B) -> Result<(), EncodeError>
fn encode<B>(&self, buf: &mut B) -> Result<(), EncodeError>
Source§fn encode_length_delimited<B>(&self, buf: &mut B) -> Result<(), EncodeError>
fn encode_length_delimited<B>(&self, buf: &mut B) -> Result<(), EncodeError>
Source§fn decode<B>(buf: B) -> Result<Self, DecodeError>
fn decode<B>(buf: B) -> Result<Self, DecodeError>
Source§fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError>
fn decode_length_delimited<B>(buf: B) -> Result<Self, DecodeError>
Source§fn merge<B>(&mut self, buf: B) -> Result<(), DecodeError>
fn merge<B>(&mut self, buf: B) -> Result<(), DecodeError>
self
. Read moreSource§fn merge_length_delimited<B>(&mut self, buf: B) -> Result<(), DecodeError>
fn merge_length_delimited<B>(&mut self, buf: B) -> Result<(), DecodeError>
self
.Source§impl PartialEq for ReadRequest
impl PartialEq for ReadRequest
impl StructuralPartialEq for ReadRequest
Auto Trait Implementations§
impl Freeze for ReadRequest
impl RefUnwindSafe for ReadRequest
impl Send for ReadRequest
impl Sync for ReadRequest
impl Unpin for ReadRequest
impl UnwindSafe for ReadRequest
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> IntoRequest<T> for T
impl<T> IntoRequest<T> for T
Source§fn into_request(self) -> Request<T>
fn into_request(self) -> Request<T>
T
in a tonic::Request