[−][src]Struct google_spanner1::ChildLink
Metadata associated with a parent-child relationship appearing in a PlanNode.
This type is not used in any activity, and only used as part of another schema.
Fields
variable: Option<String>
Only present if the child node is SCALAR and corresponds
to an output variable of the parent node. The field carries the name of
the output variable.
For example, a TableScan
operator that reads rows from a table will
have child links to the SCALAR
nodes representing the output variables
created for each column that is read by the operator. The corresponding
variable
fields will be set to the variable names assigned to the
columns.
child_index: Option<i32>
The node to which the link points.
type_: Option<String>
The type of the link. For example, in Hash Joins this could be used to distinguish between the build child and the probe child, or in the case of the child being an output variable, to represent the tag associated with the output variable.
Trait Implementations
impl Part for ChildLink
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impl Clone for ChildLink
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impl Default for ChildLink
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impl Debug for ChildLink
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impl Serialize for ChildLink
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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 ChildLink
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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 ChildLink
impl Sync for ChildLink
impl Unpin for ChildLink
impl UnwindSafe for ChildLink
impl RefUnwindSafe for ChildLink
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>,