Struct Values

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pub struct Values<'a> { /* private fields */ }
Expand description

An in-memory temporary table. Can be used in some of the databases in a place of an actual table. Doesn’t work in MySQL 5.7.

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impl<'a> Values<'a>

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pub fn empty() -> Self

Create a new empty in-memory set of values.

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pub fn new(rows: Vec<Row<'a>>) -> Self

Create a new in-memory set of values.

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pub fn with_capacity(capacity: usize) -> Self

Create a new in-memory set of values with an allocated capacity.

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pub fn push<T>(&mut self, row: T)
where T: Into<Row<'a>>,

Add value to the temporary table.

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pub fn len(&self) -> usize

The number of rows in the in-memory table.

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pub fn is_empty(&self) -> bool

True if has no rows.

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pub fn row_len(&self) -> usize

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pub fn flatten_row(self) -> Option<Row<'a>>

Trait Implementations§

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impl<'a> Clone for Values<'a>

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fn clone(&self) -> Values<'a>

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<'a> Debug for Values<'a>

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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<'a> Default for Values<'a>

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fn default() -> Values<'a>

Returns the “default value” for a type. Read more
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impl<'a, I, R> From<I> for Values<'a>
where I: Iterator<Item = R>, R: Into<Row<'a>>,

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fn from(rows: I) -> Self

Converts to this type from the input type.
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impl<'a> From<Values<'a>> for Expression<'a>

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fn from(value: Values<'a>) -> Self

Converts to this type from the input type.
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impl<'a> IntoIterator for Values<'a>

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type Item = Row<'a>

The type of the elements being iterated over.
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type IntoIter = IntoIter<<Values<'a> as IntoIterator>::Item>

Which kind of iterator are we turning this into?
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fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more
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impl<'a> PartialEq for Values<'a>

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fn eq(&self, other: &Values<'a>) -> 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<'a> StructuralPartialEq for Values<'a>

Auto Trait Implementations§

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impl<'a> Freeze for Values<'a>

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impl<'a> RefUnwindSafe for Values<'a>

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impl<'a> Send for Values<'a>

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impl<'a> Sync for Values<'a>

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impl<'a> Unpin for Values<'a>

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impl<'a> UnwindSafe for Values<'a>

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

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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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impl<'a, T> Conjunctive<'a> for T
where T: Into<Expression<'a>>,

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fn and<E>(self, other: E) -> ConditionTree<'a>
where E: Into<Expression<'a>>,

Builds an AND condition having self as the left leaf and other as the right.
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fn or<E>(self, other: E) -> ConditionTree<'a>
where E: Into<Expression<'a>>,

Builds an OR condition having self as the left leaf and other as the right.
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fn not(self) -> ConditionTree<'a>

Builds a NOT condition having self as the condition.
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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, U> Into<U> for T
where U: From<T>,

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

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
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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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

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

Performs the conversion.