pub struct WindowFrame {
    pub units: WindowFrameUnits,
    pub start_bound: WindowFrameBound,
    pub end_bound: WindowFrameBound,
}
Expand description

The frame-spec determines which output rows are read by an aggregate window function.

The ending frame boundary can be omitted (if the BETWEEN and AND keywords that surround the starting frame boundary are also omitted), in which case the ending frame boundary defaults to CURRENT ROW.

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§units: WindowFrameUnits

A frame type - either ROWS, RANGE or GROUPS

§start_bound: WindowFrameBound

A starting frame boundary

§end_bound: WindowFrameBound

An ending frame boundary

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impl WindowFrame

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pub fn new(has_order_by: bool) -> Self

Creates a new, default window frame (with the meaning of default depending on whether the frame contains an ORDER BY clause.

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pub fn reverse(&self) -> Self

Get reversed window frame. For example 3 ROWS PRECEDING AND 2 ROWS FOLLOWING –> 2 ROWS PRECEDING AND 3 ROWS FOLLOWING

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impl Clone for WindowFrame

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fn clone(&self) -> WindowFrame

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 WindowFrame

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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 Display for WindowFrame

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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 Hash for WindowFrame

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq<WindowFrame> for WindowFrame

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

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl TryFrom<WindowFrame> for WindowFrame

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type Error = DataFusionError

The type returned in the event of a conversion error.
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fn try_from(value: WindowFrame) -> Result<Self>

Performs the conversion.
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impl Eq for WindowFrame

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impl StructuralEq for WindowFrame

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impl StructuralPartialEq for WindowFrame

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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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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impl<Q, K> Equivalent<K> for Qwhere Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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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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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 Twhere 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 Twhere 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> ToString for Twhere T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for Twhere 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 Twhere 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.
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impl<T> Allocation for Twhere T: RefUnwindSafe + Send + Sync,