[−][src]Struct google_spanner1::PartitionQueryRequest
The request for PartitionQuery
Activities
This type is used in activities, which are methods you may call on this type or where this type is involved in. The list links the activity name, along with information about where it is used (one of request and response).
Fields
param_types: Option<HashMap<String, Type>>
It is not always possible for Cloud Spanner to infer the right SQL type
from a JSON value. For example, values of type BYTES
and values
of type STRING
both appear in params as JSON strings.
In these cases, param_types
can be used to specify the exact
SQL type for some or all of the SQL query parameters. See the
definition of Type for more information
about SQL types.
partition_options: Option<PartitionOptions>
Additional options that affect how many partitions are created.
transaction: Option<TransactionSelector>
Read only snapshot transactions are supported, read/write and single use transactions are not.
params: Option<HashMap<String, String>>
The SQL query string can contain parameter placeholders. A parameter
placeholder consists of '@'
followed by the parameter
name. Parameter names consist of any combination of letters,
numbers, and underscores.
Parameters can appear anywhere that a literal value is expected. The same
parameter name can be used more than once, for example:
"WHERE id > @msg_id AND id < @msg_id + 100"
It is an error to execute an SQL query with unbound parameters.
Parameter values are specified using params
, which is a JSON
object whose keys are parameter names, and whose values are the
corresponding parameter values.
sql: Option<String>
The query request to generate partitions for. The request will fail if the query is not root partitionable. The query plan of a root partitionable query has a single distributed union operator. A distributed union operator conceptually divides one or more tables into multiple splits, remotely evaluates a subquery independently on each split, and then unions all results.
This must not contain DML commands, such as INSERT, UPDATE, or DELETE. Use ExecuteStreamingSql with a PartitionedDml transaction for large, partition-friendly DML operations.
Trait Implementations
impl RequestValue for PartitionQueryRequest
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impl Clone for PartitionQueryRequest
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fn clone(&self) -> PartitionQueryRequest
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fn clone_from(&mut self, source: &Self)
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impl Default for PartitionQueryRequest
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fn default() -> PartitionQueryRequest
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impl Debug for PartitionQueryRequest
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impl Serialize for PartitionQueryRequest
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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
__S: Serializer,
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__S: Serializer,
impl<'de> Deserialize<'de> for PartitionQueryRequest
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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
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__D: Deserializer<'de>,
Auto Trait Implementations
impl Send for PartitionQueryRequest
impl Sync for PartitionQueryRequest
impl Unpin for PartitionQueryRequest
impl UnwindSafe for PartitionQueryRequest
impl RefUnwindSafe for PartitionQueryRequest
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = !
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Typeable for T where
T: Any,
T: Any,
impl<T> DeserializeOwned for T where
T: Deserialize<'de>,
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T: Deserialize<'de>,