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DmlOrderLimit

Struct DmlOrderLimit 

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pub struct DmlOrderLimit {
    pub order_by: Vec<OrderBy>,
    pub limit: Option<u32>,
}
Expand description

UPDATE <table> SET col = expr [, ...] [WHERE cond]. v4.4 — the engine evaluates expr per matched row in the table’s row order and rewrites cells in place. Indexed columns are dropped + re- inserted into the affected B-tree on each row change. v7.39 (round 413) — the boxed payload for MySQL’s ORDER BY [LIMIT] tail on a DML statement. Boxed off the statement struct so the PG-only common path stays at its pre-r413 size (see the round-305 nesting-stack lesson). v7.39 (round 431+1) — DELETE carries the identical clause with the identical meaning, so both share this one payload rather than each growing its own.

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§order_by: Vec<OrderBy>§limit: Option<u32>

Trait Implementations§

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impl Clone for DmlOrderLimit

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fn clone(&self) -> DmlOrderLimit

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

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

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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 PartialEq for DmlOrderLimit

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for DmlOrderLimit

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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<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.