MapType

risingwave_common::types::map_type

Struct MapType 

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pub struct MapType(Box<(DataType, DataType)>);
Expand description

Refer to super::super::array::MapArray for the invariants of a map value.

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§0: Box<(DataType, DataType)>

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impl MapType

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pub fn from_kv(key: DataType, value: DataType) -> Self

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Panics if the key type is not valid for a map.

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pub fn try_from_kv(key: DataType, value: DataType) -> Result<Self, String>

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pub fn try_from_entries(list_entries_type: DataType) -> Result<Self, String>

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pub fn from_entries(list_entries_type: DataType) -> Self

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Panics if the key type is not valid for a map, or the entries type is not a valid struct type.

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pub fn struct_type_for_map( key_type: DataType, value_type: DataType, ) -> StructType

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Panics if the key type is not valid for a map.

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pub fn key(&self) -> &DataType

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pub fn value(&self) -> &DataType

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pub fn into_kv(self) -> (DataType, DataType)

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pub fn into_struct(self) -> DataType

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pub fn into_list(self) -> DataType

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pub fn into_list_type(self) -> ListType

Sames as Self::into_list but returns ListType.

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pub fn check_key_type_valid(data_type: &DataType) -> Result<(), String>

String and integral types are allowed.

This is similar to Protobuf’s decision.

Note that this isn’t definitive. Just be conservative at the beginning, but not too restrictive (like only allowing strings).

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impl Clone for MapType

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fn clone(&self) -> MapType

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for MapType

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

Formats the value using the given formatter. Read more
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impl Display for MapType

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

Formats the value using the given formatter. Read more
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impl From<MapType> for DataType

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fn from(value: MapType) -> Self

Converts to this type from the input type.
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impl FromStr for MapType

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type Err = Error

The associated error which can be returned from parsing.
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fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type. Read more
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impl Hash for MapType

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for MapType

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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impl StructuralPartialEq for MapType

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> AsAny for T
where T: Any,

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fn as_any(&self) -> &(dyn Any + 'static)

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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

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fn type_name(&self) -> &'static str

Gets the type name of self
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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Forward to the method defined on the type Any.
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fn __clone_box(&self, _: Private) -> *mut ()

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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FromRef<T> for T
where T: Clone,

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fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.
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Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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Wrap the input message T in a tonic::Request
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type Err = Infallible

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fn into_result(self) -> Result<T, <T as IntoResult<T>>::Err>

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impl<M> MetricVecRelabelExt for M

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fn relabel( self, metric_level: MetricLevel, relabel_threshold: MetricLevel, ) -> RelabeledMetricVec<M>

Equivalent to RelabeledMetricVec::with_metric_level.
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fn relabel_n( self, metric_level: MetricLevel, relabel_threshold: MetricLevel, relabel_num: usize, ) -> RelabeledMetricVec<M>

Equivalent to RelabeledMetricVec::with_metric_level_relabel_n.
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fn relabel_debug_1( self, relabel_threshold: MetricLevel, ) -> RelabeledMetricVec<M>

Equivalent to RelabeledMetricVec::with_metric_level_relabel_n with metric_level set to MetricLevel::Debug and relabel_num set to 1.
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const ALIGN: usize

The alignment of pointer.
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type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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type Output = T

Should always be Self
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fn same_or_else(self, other: T, f: impl FnOnce() -> T) -> T

Check if self and other are equal, if so, return self, otherwise return the result of f().
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Scoped with ownership.
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Converts the given value to a String. Read more
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fn try_to_string(&self) -> Result<String, TryReserveError>

ToString::to_string, but without panic on OOM.

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where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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type Error = <U as TryFrom<T>>::Error

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Performs the conversion.
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fn vzip(self) -> V

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