mz_repr::relation

Struct VersionedRelationDesc

Source
pub struct VersionedRelationDesc {
    inner: RelationDesc,
}
Expand description

A wrapper around RelationDesc that provides an interface for adding columns and generating new versions.

TODO(parkmycar): Using an immutable data structure for RelationDesc would be great.

Fields§

§inner: RelationDesc

Implementations§

Source§

impl VersionedRelationDesc

Source

pub fn new(inner: RelationDesc) -> Self

Source

pub fn add_column<N, T>(&mut self, name: N, typ: T) -> RelationVersion
where N: Into<ColumnName>, T: Into<ColumnType>,

Adds a new column to this RelationDesc, creating a new version of the RelationDesc.

§Panics
  • Panics if a column with name already exists that hasn’t been dropped.

Note: For building a RelationDesc see RelationDescBuilder::with_column.

Source

pub fn drop_column<N>(&mut self, name: N) -> RelationVersion
where N: Into<ColumnName>,

Drops the column name from this RelationDesc. If there are multiple columns with name drops the left-most one that hasn’t already been dropped.

TODO(parkmycar): Add handling for dropping a column that is currently used as a key.

§Panics

Panics if a column with name does not exist or the dropped column was used as a key.

Source

pub fn latest(&self) -> RelationDesc

Returns the RelationDesc at the latest version.

Source

pub fn at_version(&self, version: RelationVersionSelector) -> RelationDesc

Returns this RelationDesc at the specified version.

Source

pub fn latest_version(&self) -> RelationVersion

Source

fn validate(&self)

Validates internal contraints of the RelationDesc are correct.

§Panics

Panics if a constraint is not satisfied.

Trait Implementations§

Source§

impl Clone for VersionedRelationDesc

Source§

fn clone(&self) -> VersionedRelationDesc

Returns a copy of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
Source§

impl Debug for VersionedRelationDesc

Source§

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

Formats the value using the given formatter. Read more
Source§

impl Serialize for VersionedRelationDesc

Source§

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more

Auto Trait Implementations§

Blanket Implementations§

Source§

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

Source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
Source§

impl<T> Borrow<T> for T
where T: ?Sized,

Source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
Source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

Source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
Source§

impl<T, U> CastInto<U> for T
where U: CastFrom<T>,

Source§

fn cast_into(self) -> U

Performs the cast.
Source§

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

Source§

unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
Source§

impl<T> From<T> for T

Source§

fn from(t: T) -> T

Returns the argument unchanged.

Source§

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

Source§

fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.
Source§

impl<T> FutureExt for T

Source§

fn with_context(self, otel_cx: Context) -> WithContext<Self>

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
Source§

fn with_current_context(self) -> WithContext<Self>

Attaches the current Context to this type, returning a WithContext wrapper. Read more
Source§

impl<T> Instrument for T

Source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
Source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
Source§

impl<T, U> Into<U> for T
where U: From<T>,

Source§

fn into(self) -> U

Calls U::from(self).

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

Source§

impl<T> IntoRequest<T> for T

Source§

fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
Source§

impl<T, U> OverrideFrom<Option<&T>> for U
where U: OverrideFrom<T>,

Source§

fn override_from(self, layer: &Option<&T>) -> U

Override the configuration represented by Self with values from the given layer.
Source§

impl<T> Pointable for T

Source§

const ALIGN: usize = _

The alignment of pointer.
Source§

type Init = T

The type for initializers.
Source§

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

Initializes a with the given initializer. Read more
Source§

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
Source§

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
Source§

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
Source§

impl<T> ProgressEventTimestamp for T
where T: Data + Debug + Any,

Source§

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

Upcasts this ProgressEventTimestamp to Any. Read more
Source§

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

Returns the name of the concrete type of this object. Read more
Source§

impl<P, R> ProtoType<R> for P
where R: RustType<P>,

Source§

impl<T> Same for T

Source§

type Output = T

Should always be Self
Source§

impl<'a, S, T> Semigroup<&'a S> for T
where T: Semigroup<S>,

Source§

fn plus_equals(&mut self, rhs: &&'a S)

The method of std::ops::AddAssign, for types that do not implement AddAssign.
Source§

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

Source§

type Owned = T

The resulting type after obtaining ownership.
Source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
Source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
Source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

Source§

type Error = Infallible

The type returned in the event of a conversion error.
Source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
Source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

Source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
Source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
Source§

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

Source§

fn vzip(self) -> V

Source§

impl<T> WithSubscriber for T

Source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
Source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
Source§

impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

Source§

impl<T> Data for T
where T: Clone + 'static,