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ReturnTypeArgs in datafusion_expr - Rust
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Struct ReturnTypeArgs

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pub struct ReturnTypeArgs<'a> {
    pub arg_types: &'a [DataType],
    pub scalar_arguments: &'a [Option<&'a ScalarValue>],
    pub nullables: &'a [bool],
}
Expand description

Information about arguments passed to the function

This structure contains metadata about how the function was called such as the type of the arguments, any scalar arguments and if the arguments can (ever) be null

See ScalarUDFImpl::return_type_from_args for more information

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§arg_types: &'a [DataType]

The data types of the arguments to the function

§scalar_arguments: &'a [Option<&'a ScalarValue>]

Is argument i to the function a scalar (constant)

If argument i is not a scalar, it will be None

For example, if a function is called like my_function(column_a, 5) this field will be [None, Some(ScalarValue::Int32(Some(5)))]

§nullables: &'a [bool]

Can argument i (ever) null?

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impl<'a> Debug for ReturnTypeArgs<'a>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'a> Freeze for ReturnTypeArgs<'a>

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impl<'a> !RefUnwindSafe for ReturnTypeArgs<'a>

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impl<'a> Send for ReturnTypeArgs<'a>

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impl<'a> Sync for ReturnTypeArgs<'a>

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impl<'a> Unpin for ReturnTypeArgs<'a>

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impl<'a> !UnwindSafe for ReturnTypeArgs<'a>

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<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, 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.