Struct PhysicalIoHelper

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pub struct PhysicalIoHelper {
    pub expr: Arc<dyn PhysicalExpr>,
    pub has_window_function: bool,
}

Expand description

Wrapper struct that allow us to use a PhysicalExpr in polars-io.

This is used to filter rows during the scan of file.

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§expr: Arc<dyn PhysicalExpr>§has_window_function: bool

Trait Implementations§

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impl PhysicalIoExpr for PhysicalIoHelper

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fn evaluate_io(&self, df: &DataFrame) -> PolarsResult<Series>

Take a DataFrame and produces a boolean Series that serves as a predicate mask

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fn live_variables(&self) -> Option<Vec<PlSmallStr>>

Get the variables that are used in the expression i.e. live variables. This can contain duplicates.

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fn as_stats_evaluator(&self) -> Option<&dyn StatsEvaluator>

Can take &dyn Statistics and determine of a file should be read -> true or not -> false

Auto Trait Implementations§

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impl !UnwindSafe for PhysicalIoHelper

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> 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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