Enum google_api_proto::google::datastore::v1::read_options::ConsistencyType
source · pub enum ConsistencyType {
ReadConsistency(i32),
Transaction(Bytes),
NewTransaction(TransactionOptions),
ReadTime(Timestamp),
}
Expand description
For Cloud Datastore, if read_consistency is not specified, then lookups and
ancestor queries default to read_consistency
=STRONG
, global queries
default to read_consistency
=EVENTUAL
.
For Cloud Firestore in Datastore mode, if read_consistency is not specified
then lookups and all queries default to read_consistency
=STRONG
.
Explicitly setting read_consistency
=EVENTUAL
will result in eventually
consistent lookups & queries in both Cloud Datastore & Cloud Firestore in
Datastore mode.
Variants§
ReadConsistency(i32)
The non-transactional read consistency to use.
Transaction(Bytes)
The identifier of the transaction in which to read. A transaction identifier is returned by a call to [Datastore.BeginTransaction][google.datastore.v1.Datastore.BeginTransaction].
NewTransaction(TransactionOptions)
Options for beginning a new transaction for this request.
The new transaction identifier will be returned in the corresponding response as either [LookupResponse.transaction][google.datastore.v1.LookupResponse.transaction] or [RunQueryResponse.transaction][google.datastore.v1.RunQueryResponse.transaction].
ReadTime(Timestamp)
Reads entities as they were at the given time. This value is only supported for Cloud Firestore in Datastore mode.
This must be a microsecond precision timestamp within the past one hour, or if Point-in-Time Recovery is enabled, can additionally be a whole minute timestamp within the past 7 days.
Implementations§
source§impl ConsistencyType
impl ConsistencyType
sourcepub fn merge<B>(
field: &mut Option<ConsistencyType>,
tag: u32,
wire_type: WireType,
buf: &mut B,
ctx: DecodeContext
) -> Result<(), DecodeError>where
B: Buf,
pub fn merge<B>(
field: &mut Option<ConsistencyType>,
tag: u32,
wire_type: WireType,
buf: &mut B,
ctx: DecodeContext
) -> Result<(), DecodeError>where
B: Buf,
Decodes an instance of the message from a buffer, and merges it into self.
sourcepub fn encoded_len(&self) -> usize
pub fn encoded_len(&self) -> usize
Returns the encoded length of the message without a length delimiter.
Trait Implementations§
source§impl Clone for ConsistencyType
impl Clone for ConsistencyType
source§fn clone(&self) -> ConsistencyType
fn clone(&self) -> ConsistencyType
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for ConsistencyType
impl Debug for ConsistencyType
source§impl PartialEq for ConsistencyType
impl PartialEq for ConsistencyType
source§fn eq(&self, other: &ConsistencyType) -> bool
fn eq(&self, other: &ConsistencyType) -> bool
self
and other
values to be equal, and is used
by ==
.impl StructuralPartialEq for ConsistencyType
Auto Trait Implementations§
impl !Freeze for ConsistencyType
impl RefUnwindSafe for ConsistencyType
impl Send for ConsistencyType
impl Sync for ConsistencyType
impl Unpin for ConsistencyType
impl UnwindSafe for ConsistencyType
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
§impl<T> Instrument for T
impl<T> Instrument for T
§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
§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