Struct DenseRankFunction

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pub struct DenseRankFunction;

Expand description

DENSE_RANK window function

Returns the rank of the current row within the partition, without gaps. Rows with equal values receive the same rank, and the next rank is incremented by 1 (no gaps).

Example: If two rows tie for rank 1, the next row gets rank 2.

Trait Implementations§

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impl Default for DenseRankFunction

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fn default() -> DenseRankFunction

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

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impl WindowFunction for DenseRankFunction

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fn name(&self) -> &str

Get the function name

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fn info(&self) -> FunctionInfo

Get function information

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fn process( &self, partition: &[Value], _order_by: &[Value], current_row: usize, ) -> Result<Value>

Process the window function Read more

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fn clone_box(&self) -> Box<dyn WindowFunction>

Clone the function into a new instance

Auto Trait Implementations§

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impl UnwindSafe for DenseRankFunction

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> CompactArcDrop for T

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unsafe fn drop_and_dealloc(ptr: *mut u8)

Drop the contained data and deallocate the header+data allocation. 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 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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