Enum tidb_query_aggr::impl_first::AggrFnStateFirst[][src]

pub enum AggrFnStateFirst<T> where
    T: EvaluableRef<'static> + 'static,
    VectorValue: VectorValueExt<T::EvaluableType>, 
{ Empty, Valued(Option<T::EvaluableType>), }

The state of the FIRST aggregate function.

Variants

Empty
Valued(Option<T::EvaluableType>)

Implementations

impl<T> AggrFnStateFirst<T> where
    T: EvaluableRef<'static> + 'static,
    VectorValue: VectorValueExt<T::EvaluableType>, 
[src]

pub fn new() -> Self[src]

fn update<'a, TT>(
    &mut self,
    _ctx: &mut EvalContext,
    value: Option<TT>
) -> Result<()> where
    TT: EvaluableRef<'a, EvaluableType = T::EvaluableType>, 
[src]

fn update_repeat<'a, TT>(
    &mut self,
    ctx: &mut EvalContext,
    value: Option<TT>,
    repeat_times: usize
) -> Result<()> where
    TT: EvaluableRef<'a, EvaluableType = T::EvaluableType>, 
[src]

fn update_vector<'a, TT, CC>(
    &mut self,
    ctx: &mut EvalContext,
    _phantom_data: Option<TT>,
    physical_values: CC,
    logical_rows: &[usize]
) -> Result<()> where
    TT: EvaluableRef<'a, EvaluableType = T::EvaluableType>,
    CC: ChunkRef<'a, TT>, 
[src]

Trait Implementations

impl<T> AggrFunctionState for AggrFnStateFirst<T> where
    T: EvaluableRef<'static> + 'static,
    VectorValue: VectorValueExt<T::EvaluableType>, 
[src]

impl<T> AggrFunctionStateUpdatePartial<T> for AggrFnStateFirst<T> where
    T: EvaluableRef<'static> + 'static,
    VectorValue: VectorValueExt<T::EvaluableType>, 
[src]

impl<T1, T> AggrFunctionStateUpdatePartial<T1> for AggrFnStateFirst<T> where
    T1: EvaluableRef<'static> + 'static,
    T: EvaluableRef<'static> + 'static,
    VectorValue: VectorValueExt<T::EvaluableType>, 
[src]

impl<T: Debug> Debug for AggrFnStateFirst<T> where
    T: EvaluableRef<'static> + 'static,
    VectorValue: VectorValueExt<T::EvaluableType>,
    T::EvaluableType: Debug
[src]

Auto Trait Implementations

impl<T> RefUnwindSafe for AggrFnStateFirst<T> where
    <T as EvaluableRef<'static>>::EvaluableType: RefUnwindSafe

impl<T> Send for AggrFnStateFirst<T>

impl<T> Sync for AggrFnStateFirst<T>

impl<T> Unpin for AggrFnStateFirst<T> where
    <T as EvaluableRef<'static>>::EvaluableType: Unpin

impl<T> UnwindSafe for AggrFnStateFirst<T> where
    <T as EvaluableRef<'static>>::EvaluableType: UnwindSafe

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
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impl<T> Borrow<T> for T where
    T: ?Sized
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impl<T> BorrowMut<T> for T where
    T: ?Sized
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impl<V, W> ConvertFrom<W> for V where
    W: ConvertTo<V>, 
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impl<T> From<T> for T[src]

impl<T> Instrument for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> Pointable for T[src]

type Init = T

The type for initializers.

impl<T> Same<T> for T[src]

type Output = T

Should always be Self

impl<T> Sealed<T> for T where
    T: ?Sized
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impl<T> SendSyncUnwindSafe for T where
    T: Send + Sync + UnwindSafe + ?Sized
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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.

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.

impl<V, T> VZip<V> for T where
    V: MultiLane<T>, 
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