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OrderedChangeSet

Struct OrderedChangeSet 

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pub struct OrderedChangeSet {
    pub creates_and_adds: Vec<ChangeEntry>,
    pub modifies: Vec<ChangeEntry>,
    pub drops: Vec<ChangeEntry>,
    pub deferred_fks: Vec<DeferredFkAdd>,
}
Expand description

A ChangeSet partitioned and sorted by the planner.

Bucket semantics:

  • creates_and_adds: CreateSchema/Table/Index/Sequence, in dependency order (dependencies before dependents).
  • modifies: AlterSchema/Table/Sequence, ReplaceIndex, in dependency order over the source-side graph.
  • drops: DropSchema/Table/Index/Sequence, in reverse dependency order over the target-side graph.
  • deferred_fks: FK constraints removed from the create graph to break a cycle; emitted after creates_and_adds as ALTER TABLE ... ADD CONSTRAINT.

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§creates_and_adds: Vec<ChangeEntry>

Creates and additive operations, in dependency order.

§modifies: Vec<ChangeEntry>

Modify-in-place operations, in dependency order.

§drops: Vec<ChangeEntry>

Drops, in reverse dependency order.

§deferred_fks: Vec<DeferredFkAdd>

FK constraints deferred to break create-graph cycles.

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impl OrderedChangeSet

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pub const fn is_empty(&self) -> bool

True iff every bucket is empty.

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pub const fn len(&self) -> usize

Total entries across all buckets, including deferred FKs.

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impl Clone for OrderedChangeSet

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fn clone(&self) -> OrderedChangeSet

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 OrderedChangeSet

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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 OrderedChangeSet

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fn default() -> OrderedChangeSet

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

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

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 StructuralPartialEq for OrderedChangeSet

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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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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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.