risingwave_expr::aggregate

Trait AggStateDyn

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pub trait AggStateDyn:
    Send
    + Sync
    + Debug
    + EstimateSize
    + Downcast { }

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impl dyn AggStateDyn

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pub fn is<__T: AggStateDyn>(&self) -> bool

Returns true if the trait object wraps an object of type __T.

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pub fn downcast<__T: AggStateDyn>( self: Box<Self>, ) -> Result<Box<__T>, Box<Self>>

Returns a boxed object from a boxed trait object if the underlying object is of type __T. Returns the original boxed trait if it isn’t.

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pub fn downcast_rc<__T: AggStateDyn>( self: Rc<Self>, ) -> Result<Rc<__T>, Rc<Self>>

Returns an Rc-ed object from an Rc-ed trait object if the underlying object is of type __T. Returns the original Rc-ed trait if it isn’t.

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pub fn downcast_ref<__T: AggStateDyn>(&self) -> Option<&__T>

Returns a reference to the object within the trait object if it is of type __T, or None if it isn’t.

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pub fn downcast_mut<__T: AggStateDyn>(&mut self) -> Option<&mut __T>

Returns a mutable reference to the object within the trait object if it is of type __T, or None if it isn’t.

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impl AggStateDyn for risingwave_expr::aggregate::scalar_wrapper::State

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impl AggStateDyn for risingwave_expr::aggregate::user_defined::State