Struct mz_repr::relation::RelationDescBuilder

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pub struct RelationDescBuilder {
    columns: Vec<(ColumnName, ColumnType)>,
    keys: Vec<Vec<usize>>,
}
Expand description

A builder for a RelationDesc.

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§columns: Vec<(ColumnName, ColumnType)>

Columns of the relation.

§keys: Vec<Vec<usize>>

Sets of indices that are “keys” for the collection.

Implementations§

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impl RelationDescBuilder

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pub fn with_column<N: Into<ColumnName>>( self, name: N, ty: ColumnType, ) -> RelationDescBuilder

Appends a column with the specified name and type.

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pub fn with_columns<I, T, N>(self, iter: I) -> Self
where I: IntoIterator<Item = (N, T)>, T: Into<ColumnType>, N: Into<ColumnName>,

Appends the provided columns to the builder.

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pub fn with_key(self, indices: Vec<usize>) -> RelationDescBuilder

Adds a new key for the relation.

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pub fn without_keys(self) -> RelationDescBuilder

Removes all previously inserted keys.

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pub fn concat(self, other: Self) -> Self

Concatenates a RelationDescBuilder onto the end of this RelationDescBuilder.

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pub fn finish(self) -> RelationDesc

Finish the builder, returning a RelationDesc.

Trait Implementations§

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impl Clone for RelationDescBuilder

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fn clone(&self) -> RelationDescBuilder

Returns a copy 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 RelationDescBuilder

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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 Default for RelationDescBuilder

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fn default() -> RelationDescBuilder

Returns the “default value” for a type. Read more
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impl PartialEq for RelationDescBuilder

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fn eq(&self, other: &RelationDescBuilder) -> 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 RelationDescBuilder

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impl StructuralPartialEq for RelationDescBuilder

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

🔬This is a nightly-only experimental API. (clone_to_uninit)
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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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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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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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